diff --git a/.env.example b/.env.example
index b08736cdf..b3db68bd1 100644
--- a/.env.example
+++ b/.env.example
@@ -30,7 +30,19 @@ SWAGGER_ADDRESS_PORT=
 
 # Server
 SITE_ADDR=0.0.0.0:3000
+# Comma-separated reverse proxy IPs/CIDRs. Use "none" when directly exposed.
+TRUSTED_PROXIES=127.0.0.1,::1
 
 # Logging
 LOG_LEVEL=INFO
 LOG_PATH=
+
+# Cache
+CACHE_TYPE=redis
+REDIS_HOST=127.0.0.1
+REDIS_PORT=6379
+REDIS_USERNAME=
+REDIS_PASSWORD=
+REDIS_DB=0
+REDIS_KEY_PREFIX=hnu-forum:
+REDIS_POOL_SIZE=20
diff --git a/.github/workflows/build-production-image.yml b/.github/workflows/build-production-image.yml
new file mode 100644
index 000000000..bc5fb4294
--- /dev/null
+++ b/.github/workflows/build-production-image.yml
@@ -0,0 +1,70 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: Build Production Image
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+  packages: write
+
+concurrency:
+  group: production-image
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 90
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64
+          push: true
+          pull: true
+          tags: |
+            ghcr.io/irofahaxikk/hnu-forum:production
+            ghcr.io/irofahaxikk/hnu-forum:sha-${{ github.sha }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/IroFahaxikk/hnu-forum
+            org.opencontainers.image.revision=${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          build-args: |
+            GOPROXY=https://proxy.golang.org,direct
diff --git a/.gitignore b/.gitignore
index ba66f51a0..52165d6c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,7 @@ dist/
 .husky/
 
 # Environment variables
-.env
\ No newline at end of file
+.env
+/deploy/production/.env
+
+AGENT.md
diff --git a/cmd/main.go b/cmd/main.go
index 1f8153001..d36c59626 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -95,6 +95,9 @@ func runApp() {
 }
 
 func newApplication(serverConf *conf.Server, server *gin.Engine, manager *cron.ScheduledTaskManager) *pacman.Application {
+	if err := server.SetTrustedProxies(serverConf.HTTP.TrustedProxies); err != nil {
+		panic(err)
+	}
 	manager.Run()
 	return pacman.NewApp(
 		pacman.WithName(Name),
diff --git a/cmd/wire_gen.go b/cmd/wire_gen.go
index 446f6cc0b..e96fa362b 100644
--- a/cmd/wire_gen.go
+++ b/cmd/wire_gen.go
@@ -51,6 +51,7 @@ import (
 	"github.com/apache/answer/internal/repo/config"
 	"github.com/apache/answer/internal/repo/export"
 	"github.com/apache/answer/internal/repo/file_record"
+	"github.com/apache/answer/internal/repo/forum_section"
 	"github.com/apache/answer/internal/repo/limit"
 	"github.com/apache/answer/internal/repo/meta"
 	notification2 "github.com/apache/answer/internal/repo/notification"
@@ -58,6 +59,7 @@ import (
 	"github.com/apache/answer/internal/repo/question"
 	"github.com/apache/answer/internal/repo/rank"
 	"github.com/apache/answer/internal/repo/reason"
+	"github.com/apache/answer/internal/repo/registration"
 	"github.com/apache/answer/internal/repo/report"
 	"github.com/apache/answer/internal/repo/review"
 	"github.com/apache/answer/internal/repo/revision"
@@ -93,6 +95,7 @@ import (
 	"github.com/apache/answer/internal/service/feature_toggle"
 	file_record2 "github.com/apache/answer/internal/service/file_record"
 	"github.com/apache/answer/internal/service/follow"
+	forum_section2 "github.com/apache/answer/internal/service/forum_section"
 	"github.com/apache/answer/internal/service/importer"
 	meta2 "github.com/apache/answer/internal/service/meta"
 	"github.com/apache/answer/internal/service/meta_common"
@@ -147,6 +150,8 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 		cleanup()
 		return nil, nil, err
 	}
+	forumSectionRepo := forum_section.NewForumSectionRepo(dataData)
+	forumSectionService := forum_section2.NewForumSectionService(forumSectionRepo)
 	siteInfoRepo := site_info.NewSiteInfo(dataData)
 	siteInfoCommonService := siteinfo_common.NewSiteInfoCommonService(siteInfoRepo)
 	langController := controller.NewLangController(i18nTranslator, siteInfoCommonService)
@@ -191,7 +196,8 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	eventqueueService := eventqueue.NewService()
 	fileRecordRepo := file_record.NewFileRecordRepo(dataData)
 	fileRecordService := file_record2.NewFileRecordService(fileRecordRepo, revisionRepo, serviceConf, siteInfoCommonService, userCommon)
-	userService := content.NewUserService(userRepo, userActiveActivityRepo, activityRepo, emailService, authService, siteInfoCommonService, userRoleRelService, userCommon, userExternalLoginService, userNotificationConfigRepo, userNotificationConfigService, questionCommon, eventqueueService, fileRecordService)
+	registrationSecurityRepo := registration.NewRegistrationRepo(dataData)
+	userService := content.NewUserService(userRepo, userActiveActivityRepo, activityRepo, emailService, authService, siteInfoCommonService, userRoleRelService, userCommon, userExternalLoginService, userNotificationConfigRepo, userNotificationConfigService, questionCommon, eventqueueService, fileRecordService, registrationSecurityRepo)
 	captchaRepo := captcha.NewCaptchaRepo(dataData)
 	captchaService := action.NewCaptchaService(captchaRepo)
 	userController := controller.NewUserController(authService, userService, captchaService, emailService, siteInfoCommonService, userNotificationConfigService)
@@ -215,7 +221,7 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	answerActivityRepo := activity.NewAnswerActivityRepo(dataData, activityRepo, userRankRepo, noticequeueService)
 	answerActivityService := activity2.NewAnswerActivityService(answerActivityRepo, configService)
 	externalNotificationService := notification.NewExternalNotificationService(dataData, userNotificationConfigRepo, followRepo, emailService, userRepo, externalService, userExternalLoginRepo, siteInfoCommonService)
-	questionService := content.NewQuestionService(activityRepo, questionRepo, answerRepo, tagCommonService, tagService, questionCommon, userCommon, userRepo, userRoleRelService, revisionService, metaCommonService, collectionCommon, answerActivityService, emailService, noticequeueService, externalService, service, siteInfoCommonService, externalNotificationService, reviewService, configService, eventqueueService, reviewRepo, vector_syncService)
+	questionService := content.NewQuestionService(activityRepo, questionRepo, answerRepo, tagCommonService, tagService, questionCommon, userCommon, userRepo, userRoleRelService, revisionService, metaCommonService, collectionCommon, answerActivityService, emailService, noticequeueService, externalService, service, siteInfoCommonService, externalNotificationService, reviewService, configService, eventqueueService, reviewRepo, vector_syncService, forumSectionService)
 	answerService := content.NewAnswerService(answerRepo, questionRepo, questionCommon, userCommon, collectionCommon, userRepo, revisionService, answerActivityService, answerCommon, voteRepo, emailService, userRoleRelService, noticequeueService, externalService, service, reviewService, eventqueueService, vector_syncService)
 	reportHandle := report_handle.NewReportHandle(questionService, answerService, commentService)
 	reportService := report2.NewReportService(reportRepo, objService, userCommon, answerRepo, questionRepo, commentCommonRepo, reportHandle, configService, eventqueueService)
@@ -231,6 +237,7 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	collectionService := collection2.NewCollectionService(collectionRepo, collectionGroupRepo, questionCommon)
 	collectionController := controller.NewCollectionController(collectionService)
 	questionController := controller.NewQuestionController(questionService, answerService, rankService, siteInfoCommonService, captchaService, rateLimitMiddleware)
+	forumSectionController := controller.NewForumSectionController(forumSectionService)
 	answerController := controller.NewAnswerController(answerService, rankService, captchaService, siteInfoCommonService, rateLimitMiddleware)
 	searchParser := search_parser.NewSearchParser(tagCommonService, userCommon)
 	searchRepo := search_common.NewSearchRepo(dataData, uniqueIDRepo, userCommon, tagCommonService)
@@ -293,7 +300,7 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	aiController := controller.NewAIController(searchService, siteInfoCommonService, tagCommonService, questionCommon, commentRepo, userCommon, answerRepo, mcpController, aiConversationService, featureToggleService)
 	aiConversationController := controller.NewAIConversationController(aiConversationService, featureToggleService)
 	aiConversationAdminController := controller_admin.NewAIConversationAdminController(aiConversationService, featureToggleService)
-	answerAPIRouter := router.NewAnswerAPIRouter(langController, userController, commentController, reportController, voteController, tagController, followController, collectionController, questionController, answerController, searchController, revisionController, rankController, userAdminController, reasonController, themeController, siteInfoController, controllerSiteInfoController, notificationController, dashboardController, uploadController, activityController, roleController, pluginController, permissionController, userPluginController, reviewController, metaController, badgeController, controller_adminBadgeController, adminAPIKeyController, aiController, aiConversationController, aiConversationAdminController, mcpController)
+	answerAPIRouter := router.NewAnswerAPIRouter(langController, userController, commentController, reportController, voteController, tagController, followController, collectionController, questionController, answerController, searchController, revisionController, rankController, userAdminController, reasonController, themeController, siteInfoController, controllerSiteInfoController, notificationController, dashboardController, uploadController, activityController, roleController, pluginController, permissionController, userPluginController, reviewController, metaController, badgeController, controller_adminBadgeController, adminAPIKeyController, aiController, aiConversationController, aiConversationAdminController, mcpController, forumSectionController)
 	swaggerRouter := router.NewSwaggerRouter(swaggerConf)
 	uiRouter := router.NewUIRouter(controllerSiteInfoController, siteInfoCommonService)
 	authUserMiddleware := middleware.NewAuthUserMiddleware(authService, siteInfoCommonService)
diff --git a/configs/config.yaml b/configs/config.yaml
index d14072785..36c6fbafe 100644
--- a/configs/config.yaml
+++ b/configs/config.yaml
@@ -18,12 +18,25 @@
 server:
   http:
     addr: 0.0.0.0:80
+    # Trust only the reverse proxy that directly connects to Answer.
+    trusted_proxies:
+      - 127.0.0.1
+      - ::1
 data:
   database:
     driver: "sqlite3"
     connection: "/data/sqlite3/answer.db"
   cache:
+    type: "redis"
     file_path: "/data/cache/cache.db"
+    redis:
+      host: "127.0.0.1"
+      port: 6379
+      username: ""
+      password: ""
+      db: 0
+      key_prefix: "hnu-forum:"
+      pool_size: 20
 i18n:
   bundle_dir: "/data/i18n"
 swaggerui:
@@ -41,4 +54,3 @@ ui:
   api_url: '/'
   base_url: ''
   api_base_url: ''
-
diff --git a/deploy/production/.env.example b/deploy/production/.env.example
new file mode 100644
index 000000000..55ae8f345
--- /dev/null
+++ b/deploy/production/.env.example
@@ -0,0 +1,13 @@
+DOMAIN=dongpolakeside.com
+HNU_DATA_ROOT=/srv/hnu-forum
+ANSWER_IMAGE=ghcr.io/irofahaxikk/hnu-forum
+IMAGE_TAG=production
+
+GOPROXY=https://proxy.golang.org,direct
+
+MYSQL_DATABASE=answer
+MYSQL_USER=answer
+MYSQL_PASSWORD=replace_with_generated_secret
+MYSQL_ROOT_PASSWORD=replace_with_generated_secret
+
+REDIS_PASSWORD=replace_with_generated_secret
diff --git a/deploy/production/docker-compose.yml b/deploy/production/docker-compose.yml
new file mode 100644
index 000000000..eea581cd9
--- /dev/null
+++ b/deploy/production/docker-compose.yml
@@ -0,0 +1,120 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: hnu-forum
+
+x-logging: &default-logging
+  driver: json-file
+  options:
+    max-size: "10m"
+    max-file: "3"
+
+services:
+  mysql:
+    image: mysql:8.4
+    restart: unless-stopped
+    environment:
+      TZ: Asia/Hong_Kong
+      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:?MYSQL_ROOT_PASSWORD is required}
+      MYSQL_DATABASE: ${MYSQL_DATABASE:-answer}
+      MYSQL_USER: ${MYSQL_USER:-answer}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD:?MYSQL_PASSWORD is required}
+    command:
+      - --character-set-server=utf8mb4
+      - --collation-server=utf8mb4_unicode_ci
+      - --default-time-zone=+08:00
+      - --innodb-buffer-pool-size=384M
+      - --max-connections=100
+    volumes:
+      - ${HNU_DATA_ROOT:-/srv/hnu-forum}/mysql:/var/lib/mysql
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - mysqladmin ping -h 127.0.0.1 -uroot -p"$${MYSQL_ROOT_PASSWORD}" --silent
+      interval: 10s
+      timeout: 5s
+      retries: 20
+    networks:
+      - backend
+    mem_limit: 768m
+    logging: *default-logging
+
+  redis:
+    image: redis:7.4-alpine
+    restart: unless-stopped
+    environment:
+      TZ: Asia/Hong_Kong
+      REDIS_PASSWORD: ${REDIS_PASSWORD:?REDIS_PASSWORD is required}
+    command:
+      - sh
+      - -c
+      - exec redis-server --appendonly yes --requirepass "$$REDIS_PASSWORD" --maxmemory 128mb --maxmemory-policy allkeys-lru
+    volumes:
+      - ${HNU_DATA_ROOT:-/srv/hnu-forum}/redis:/data
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - redis-cli -a "$${REDIS_PASSWORD}" ping | grep -q PONG
+      interval: 10s
+      timeout: 5s
+      retries: 20
+    networks:
+      - backend
+    mem_limit: 256m
+    logging: *default-logging
+
+  answer:
+    image: ${ANSWER_IMAGE:-ghcr.io/irofahaxikk/hnu-forum}:${IMAGE_TAG:-production}
+    pull_policy: always
+    restart: unless-stopped
+    environment:
+      TZ: Asia/Hong_Kong
+      SITE_ADDR: 0.0.0.0:80
+      CACHE_TYPE: redis
+      REDIS_HOST: redis
+      REDIS_PORT: 6379
+      REDIS_PASSWORD: ${REDIS_PASSWORD:?REDIS_PASSWORD is required}
+      REDIS_DB: 0
+      REDIS_KEY_PREFIX: "hnu-forum:"
+      REDIS_POOL_SIZE: 10
+      TRUSTED_PROXIES: 172.16.0.0/12
+      SWAGGER_HOST: ${DOMAIN:-dongpolakeside.com}
+      SWAGGER_ADDRESS_PORT: ":443"
+    ports:
+      - 127.0.0.1:9080:80
+    volumes:
+      - ${HNU_DATA_ROOT:-/srv/hnu-forum}/answer:/data
+    depends_on:
+      mysql:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - curl -fsS http://127.0.0.1/ >/dev/null || exit 1
+      interval: 15s
+      timeout: 5s
+      retries: 20
+    networks:
+      - backend
+    mem_limit: 1g
+    logging: *default-logging
+
+networks:
+  backend:
+    driver: bridge
diff --git a/docs/docs.go b/docs/docs.go
index 4e48c88d0..95b82d8ec 100644
--- a/docs/docs.go
+++ b/docs/docs.go
@@ -4249,6 +4249,41 @@ const docTemplate = `{
                 }
             }
         },
+        "/answer/api/v1/forum/sections": {
+            "get": {
+                "description": "returns parent sections and their child sections",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Forum Section"
+                ],
+                "summary": "list campus forum sections",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/handler.RespBody"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "data": {
+                                            "type": "array",
+                                            "items": {
+                                                "$ref": "#/definitions/schema.ForumSectionResp"
+                                            }
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
         "/answer/api/v1/language/config": {
             "get": {
                 "description": "get language config mapping",
@@ -7999,6 +8034,58 @@ const docTemplate = `{
                 }
             }
         },
+        "/answer/api/v1/user/register/email/code": {
+            "post": {
+                "description": "Sends a six-digit registration code after captcha and rate-limit checks",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "User"
+                ],
+                "summary": "Send registration email verification code",
+                "parameters": [
+                    {
+                        "description": "UserRegisterEmailCodeReq",
+                        "name": "data",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/schema.UserRegisterEmailCodeReq"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.RespBody"
+                        }
+                    },
+                    "429": {
+                        "description": "Too Many Requests",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/handler.RespBody"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "data": {
+                                            "$ref": "#/definitions/schema.RetryAfterResp"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
         "/answer/api/v1/user/staff": {
             "get": {
                 "description": "get user staff",
@@ -9567,6 +9654,32 @@ const docTemplate = `{
                 }
             }
         },
+        "schema.ForumSectionResp": {
+            "type": "object",
+            "properties": {
+                "admin_only": {
+                    "type": "boolean"
+                },
+                "children": {
+                    "type": "array",
+                    "items": {
+                        "$ref": "#/definitions/schema.ForumSectionResp"
+                    }
+                },
+                "id": {
+                    "type": "integer"
+                },
+                "name": {
+                    "type": "string"
+                },
+                "parent_id": {
+                    "type": "integer"
+                },
+                "slug": {
+                    "type": "string"
+                }
+            }
+        },
         "schema.GetAIModelResp": {
             "type": "object",
             "properties": {
@@ -10984,6 +11097,7 @@ const docTemplate = `{
         "schema.QuestionAdd": {
             "type": "object",
             "required": [
+                "section_id",
                 "title"
             ],
             "properties": {
@@ -11000,6 +11114,11 @@ const docTemplate = `{
                     "maxLength": 65535,
                     "minLength": 0
                 },
+                "section_id": {
+                    "description": "campus forum section (leaf section only)",
+                    "type": "integer",
+                    "minimum": 1
+                },
                 "tags": {
                     "description": "tags",
                     "type": "array",
@@ -11019,6 +11138,7 @@ const docTemplate = `{
             "type": "object",
             "required": [
                 "answer_content",
+                "section_id",
                 "title"
             ],
             "properties": {
@@ -11046,6 +11166,10 @@ const docTemplate = `{
                         "type": "string"
                     }
                 },
+                "section_id": {
+                    "type": "integer",
+                    "minimum": 1
+                },
                 "tags": {
                     "description": "tags",
                     "type": "array",
@@ -11131,6 +11255,9 @@ const docTemplate = `{
                 "pin": {
                     "type": "integer"
                 },
+                "section_id": {
+                    "type": "integer"
+                },
                 "show": {
                     "type": "integer"
                 },
@@ -11199,6 +11326,10 @@ const docTemplate = `{
                     "type": "integer",
                     "minimum": 1
                 },
+                "section": {
+                    "type": "string",
+                    "maxLength": 50
+                },
                 "tag": {
                     "type": "string",
                     "maxLength": 100
@@ -11251,6 +11382,9 @@ const docTemplate = `{
                     "description": "1: unpin, 2: pin",
                     "type": "integer"
                 },
+                "section_id": {
+                    "type": "integer"
+                },
                 "show": {
                     "description": "0: show, 1: hide",
                     "type": "integer"
@@ -11529,6 +11663,14 @@ const docTemplate = `{
                 }
             }
         },
+        "schema.RetryAfterResp": {
+            "type": "object",
+            "properties": {
+                "retry_after": {
+                    "type": "integer"
+                }
+            }
+        },
         "schema.ReviewReportReq": {
             "type": "object",
             "required": [
@@ -13375,12 +13517,10 @@ const docTemplate = `{
                 }
             }
         },
-        "schema.UserRegisterReq": {
+        "schema.UserRegisterEmailCodeReq": {
             "type": "object",
             "required": [
-                "e_mail",
-                "name",
-                "pass"
+                "e_mail"
             ],
             "properties": {
                 "captcha_code": {
@@ -13392,6 +13532,25 @@ const docTemplate = `{
                 "e_mail": {
                     "type": "string",
                     "maxLength": 500
+                }
+            }
+        },
+        "schema.UserRegisterReq": {
+            "type": "object",
+            "required": [
+                "e_mail",
+                "email_code",
+                "name",
+                "pass",
+                "pass_confirm"
+            ],
+            "properties": {
+                "e_mail": {
+                    "type": "string",
+                    "maxLength": 500
+                },
+                "email_code": {
+                    "type": "string"
                 },
                 "name": {
                     "type": "string",
@@ -13402,6 +13561,11 @@ const docTemplate = `{
                     "type": "string",
                     "maxLength": 32,
                     "minLength": 8
+                },
+                "pass_confirm": {
+                    "type": "string",
+                    "maxLength": 32,
+                    "minLength": 8
                 }
             }
         },
diff --git a/docs/swagger.json b/docs/swagger.json
index a075dfe45..e0cebe5ad 100644
--- a/docs/swagger.json
+++ b/docs/swagger.json
@@ -4222,6 +4222,41 @@
                 }
             }
         },
+        "/answer/api/v1/forum/sections": {
+            "get": {
+                "description": "returns parent sections and their child sections",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Forum Section"
+                ],
+                "summary": "list campus forum sections",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/handler.RespBody"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "data": {
+                                            "type": "array",
+                                            "items": {
+                                                "$ref": "#/definitions/schema.ForumSectionResp"
+                                            }
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
         "/answer/api/v1/language/config": {
             "get": {
                 "description": "get language config mapping",
@@ -7972,6 +8007,58 @@
                 }
             }
         },
+        "/answer/api/v1/user/register/email/code": {
+            "post": {
+                "description": "Sends a six-digit registration code after captcha and rate-limit checks",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "User"
+                ],
+                "summary": "Send registration email verification code",
+                "parameters": [
+                    {
+                        "description": "UserRegisterEmailCodeReq",
+                        "name": "data",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/schema.UserRegisterEmailCodeReq"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/handler.RespBody"
+                        }
+                    },
+                    "429": {
+                        "description": "Too Many Requests",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/handler.RespBody"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "data": {
+                                            "$ref": "#/definitions/schema.RetryAfterResp"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
         "/answer/api/v1/user/staff": {
             "get": {
                 "description": "get user staff",
@@ -9540,6 +9627,32 @@
                 }
             }
         },
+        "schema.ForumSectionResp": {
+            "type": "object",
+            "properties": {
+                "admin_only": {
+                    "type": "boolean"
+                },
+                "children": {
+                    "type": "array",
+                    "items": {
+                        "$ref": "#/definitions/schema.ForumSectionResp"
+                    }
+                },
+                "id": {
+                    "type": "integer"
+                },
+                "name": {
+                    "type": "string"
+                },
+                "parent_id": {
+                    "type": "integer"
+                },
+                "slug": {
+                    "type": "string"
+                }
+            }
+        },
         "schema.GetAIModelResp": {
             "type": "object",
             "properties": {
@@ -10957,6 +11070,7 @@
         "schema.QuestionAdd": {
             "type": "object",
             "required": [
+                "section_id",
                 "title"
             ],
             "properties": {
@@ -10973,6 +11087,11 @@
                     "maxLength": 65535,
                     "minLength": 0
                 },
+                "section_id": {
+                    "description": "campus forum section (leaf section only)",
+                    "type": "integer",
+                    "minimum": 1
+                },
                 "tags": {
                     "description": "tags",
                     "type": "array",
@@ -10992,6 +11111,7 @@
             "type": "object",
             "required": [
                 "answer_content",
+                "section_id",
                 "title"
             ],
             "properties": {
@@ -11019,6 +11139,10 @@
                         "type": "string"
                     }
                 },
+                "section_id": {
+                    "type": "integer",
+                    "minimum": 1
+                },
                 "tags": {
                     "description": "tags",
                     "type": "array",
@@ -11104,6 +11228,9 @@
                 "pin": {
                     "type": "integer"
                 },
+                "section_id": {
+                    "type": "integer"
+                },
                 "show": {
                     "type": "integer"
                 },
@@ -11172,6 +11299,10 @@
                     "type": "integer",
                     "minimum": 1
                 },
+                "section": {
+                    "type": "string",
+                    "maxLength": 50
+                },
                 "tag": {
                     "type": "string",
                     "maxLength": 100
@@ -11224,6 +11355,9 @@
                     "description": "1: unpin, 2: pin",
                     "type": "integer"
                 },
+                "section_id": {
+                    "type": "integer"
+                },
                 "show": {
                     "description": "0: show, 1: hide",
                     "type": "integer"
@@ -11502,6 +11636,14 @@
                 }
             }
         },
+        "schema.RetryAfterResp": {
+            "type": "object",
+            "properties": {
+                "retry_after": {
+                    "type": "integer"
+                }
+            }
+        },
         "schema.ReviewReportReq": {
             "type": "object",
             "required": [
@@ -13348,12 +13490,10 @@
                 }
             }
         },
-        "schema.UserRegisterReq": {
+        "schema.UserRegisterEmailCodeReq": {
             "type": "object",
             "required": [
-                "e_mail",
-                "name",
-                "pass"
+                "e_mail"
             ],
             "properties": {
                 "captcha_code": {
@@ -13365,6 +13505,25 @@
                 "e_mail": {
                     "type": "string",
                     "maxLength": 500
+                }
+            }
+        },
+        "schema.UserRegisterReq": {
+            "type": "object",
+            "required": [
+                "e_mail",
+                "email_code",
+                "name",
+                "pass",
+                "pass_confirm"
+            ],
+            "properties": {
+                "e_mail": {
+                    "type": "string",
+                    "maxLength": 500
+                },
+                "email_code": {
+                    "type": "string"
                 },
                 "name": {
                     "type": "string",
@@ -13375,6 +13534,11 @@
                     "type": "string",
                     "maxLength": 32,
                     "minLength": 8
+                },
+                "pass_confirm": {
+                    "type": "string",
+                    "maxLength": 32,
+                    "minLength": 8
                 }
             }
         },
diff --git a/docs/swagger.yaml b/docs/swagger.yaml
index b3416a10e..3c7a7490c 100644
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@@ -766,6 +766,23 @@ definitions:
         description: if user is followed object will be true,otherwise false
         type: boolean
     type: object
+  schema.ForumSectionResp:
+    properties:
+      admin_only:
+        type: boolean
+      children:
+        items:
+          $ref: '#/definitions/schema.ForumSectionResp'
+        type: array
+      id:
+        type: integer
+      name:
+        type: string
+      parent_id:
+        type: integer
+      slug:
+        type: string
+    type: object
   schema.GetAIModelResp:
     properties:
       created:
@@ -1761,6 +1778,10 @@ definitions:
         maxLength: 65535
         minLength: 0
         type: string
+      section_id:
+        description: campus forum section (leaf section only)
+        minimum: 1
+        type: integer
       tags:
         description: tags
         items:
@@ -1772,6 +1793,7 @@ definitions:
         minLength: 6
         type: string
     required:
+    - section_id
     - title
     type: object
   schema.QuestionAddByAnswer:
@@ -1794,6 +1816,9 @@ definitions:
         items:
           type: string
         type: array
+      section_id:
+        minimum: 1
+        type: integer
       tags:
         description: tags
         items:
@@ -1806,6 +1831,7 @@ definitions:
         type: string
     required:
     - answer_content
+    - section_id
     - title
     type: object
   schema.QuestionInfoResp:
@@ -1855,6 +1881,8 @@ definitions:
         $ref: '#/definitions/schema.Operation'
       pin:
         type: integer
+      section_id:
+        type: integer
       show:
         type: integer
       status:
@@ -1903,6 +1931,9 @@ definitions:
       page_size:
         minimum: 1
         type: integer
+      section:
+        maxLength: 50
+        type: string
       tag:
         maxLength: 100
         type: string
@@ -1939,6 +1970,8 @@ definitions:
       pin:
         description: '1: unpin, 2: pin'
         type: integer
+      section_id:
+        type: integer
       show:
         description: '0: show, 1: hide'
         type: integer
@@ -2127,6 +2160,11 @@ definitions:
       question_id:
         type: string
     type: object
+  schema.RetryAfterResp:
+    properties:
+      retry_after:
+        type: integer
+    type: object
   schema.ReviewReportReq:
     properties:
       close_msg:
@@ -3401,7 +3439,7 @@ definitions:
     - code
     - pass
     type: object
-  schema.UserRegisterReq:
+  schema.UserRegisterEmailCodeReq:
     properties:
       captcha_code:
         type: string
@@ -3410,6 +3448,16 @@ definitions:
       e_mail:
         maxLength: 500
         type: string
+    required:
+    - e_mail
+    type: object
+  schema.UserRegisterReq:
+    properties:
+      e_mail:
+        maxLength: 500
+        type: string
+      email_code:
+        type: string
       name:
         maxLength: 30
         minLength: 2
@@ -3418,10 +3466,16 @@ definitions:
         maxLength: 32
         minLength: 8
         type: string
+      pass_confirm:
+        maxLength: 32
+        minLength: 8
+        type: string
     required:
     - e_mail
+    - email_code
     - name
     - pass
+    - pass_confirm
     type: object
   schema.UserRetrievePassWordRequest:
     properties:
@@ -5983,6 +6037,26 @@ paths:
       summary: update user follow tags
       tags:
       - Activity
+  /answer/api/v1/forum/sections:
+    get:
+      description: returns parent sections and their child sections
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            allOf:
+            - $ref: '#/definitions/handler.RespBody'
+            - properties:
+                data:
+                  items:
+                    $ref: '#/definitions/schema.ForumSectionResp'
+                  type: array
+              type: object
+      summary: list campus forum sections
+      tags:
+      - Forum Section
   /answer/api/v1/language/config:
     get:
       description: get language config mapping
@@ -8260,6 +8334,38 @@ paths:
       summary: UserRegisterByEmail
       tags:
       - User
+  /answer/api/v1/user/register/email/code:
+    post:
+      consumes:
+      - application/json
+      description: Sends a six-digit registration code after captcha and rate-limit
+        checks
+      parameters:
+      - description: UserRegisterEmailCodeReq
+        in: body
+        name: data
+        required: true
+        schema:
+          $ref: '#/definitions/schema.UserRegisterEmailCodeReq'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/handler.RespBody'
+        "429":
+          description: Too Many Requests
+          schema:
+            allOf:
+            - $ref: '#/definitions/handler.RespBody'
+            - properties:
+                data:
+                  $ref: '#/definitions/schema.RetryAfterResp'
+              type: object
+      summary: Send registration email verification code
+      tags:
+      - User
   /answer/api/v1/user/staff:
     get:
       consumes:
diff --git a/go.mod b/go.mod
index 5787c8b18..a10f92505 100644
--- a/go.mod
+++ b/go.mod
@@ -22,6 +22,7 @@ go 1.25.0
 require (
 	github.com/Machiel/slugify v1.0.1
 	github.com/Masterminds/semver/v3 v3.3.0
+	github.com/alicebob/miniredis/v2 v2.38.0
 	github.com/anargu/gin-brotli v0.0.0-20220116052358-12bf532d5267
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2
 	github.com/bwmarrin/snowflake v0.3.0
@@ -45,6 +46,7 @@ require (
 	github.com/mozillazg/go-pinyin v0.20.0
 	github.com/mozillazg/go-unidecode v0.2.0
 	github.com/ory/dockertest/v3 v3.11.0
+	github.com/redis/go-redis/v9 v9.21.0
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/sashabaranov/go-openai v1.41.2
 	github.com/scottleedavis/go-exif-remove v0.0.0-20230314195146-7e059d593405
@@ -88,6 +90,7 @@ require (
 	github.com/bytedance/sonic v1.12.2 // indirect
 	github.com/bytedance/sonic/loader v0.2.0 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.4 // indirect
 	github.com/cloudwego/iasm v0.2.0 // indirect
 	github.com/containerd/continuity v0.4.3 // indirect
@@ -126,7 +129,7 @@ require (
 	github.com/invopop/jsonschema v0.13.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/lestrrat-go/file-rotatelogs v2.4.0+incompatible // indirect
 	github.com/lestrrat-go/strftime v1.1.0 // indirect
@@ -166,6 +169,8 @@ require (
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
 	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
+	github.com/yuin/gopher-lua v1.1.1 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/arch v0.10.0 // indirect
diff --git a/go.sum b/go.sum
index 1001f1da0..c94fc21bc 100644
--- a/go.sum
+++ b/go.sum
@@ -36,6 +36,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alicebob/miniredis/v2 v2.38.0 h1:nZAzCR+Lj+Vxk4ZXzm2NuKq2O33RXj1XxJ2e2uP9jiw=
+github.com/alicebob/miniredis/v2 v2.38.0/go.mod h1:TcL7YfarKPGDAthEtl5NBeHZfeUQj6OXMm/+iu5cLMM=
 github.com/anargu/gin-brotli v0.0.0-20220116052358-12bf532d5267 h1:vDHsaEcs/Q0dwetADENtwus6W1ccaZ9h3KBTm0d2X0g=
 github.com/anargu/gin-brotli v0.0.0-20220116052358-12bf532d5267/go.mod h1:Yj3yPP/vi87JjwylUTCMyd6FrOfGqP1AHk0305hDm2o=
 github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
@@ -60,6 +62,10 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
 github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
 github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/bwmarrin/snowflake v0.3.0 h1:xm67bEhkKh6ij1790JB83OujPR5CzNe8QuQqAgISZN0=
@@ -75,6 +81,8 @@ github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK3
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
@@ -382,8 +390,8 @@ github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvW
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/klauspost/cpuid/v2 v2.2.8 h1:+StwCXwm9PdpiEkPyzBXIy+M9KUb4ODm0Zarf1kS5BM=
-github.com/klauspost/cpuid/v2 v2.2.8/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
+github.com/klauspost/cpuid/v2 v2.2.10 h1:tBs3QSyvjDyFTq3uoc/9xFpCuOsJQFNPiAhYdw2skhE=
+github.com/klauspost/cpuid/v2 v2.2.10/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
 github.com/knz/go-libedit v1.10.1/go.mod h1:MZTVkCWyz0oBc7JOWP3wNAzd002ZbM/5hgShxwh4x8M=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -535,6 +543,8 @@ github.com/prometheus/procfs v0.0.0-20190117184657-bf6a532e95b1/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
+github.com/redis/go-redis/v9 v9.21.0 h1:FPBE4hhbAke+TLmcY3WkpbDffJEomdqPn3HYiqAtL9E=
+github.com/redis/go-redis/v9 v9.21.0/go.mod h1:v/M13XI1PVCDcm01VtPFOADfZtHf8YW3baQf57KlIkA=
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
@@ -661,6 +671,10 @@ github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9dec
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yuin/goldmark v1.7.4 h1:BDXOHExt+A7gwPCJgPIIq7ENvceR7we7rOS9TNoLZeg=
 github.com/yuin/goldmark v1.7.4/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
+github.com/yuin/gopher-lua v1.1.1 h1:kYKnWBjvbNP4XLT3+bPEwAXJx262OhaHDWDVOPjL46M=
+github.com/yuin/gopher-lua v1.1.1/go.mod h1:GBR0iDaNXjAgGg9zfCvksxSRnQx76gclCIb7kdAd1Pw=
+github.com/zeebo/xxh3 v1.1.0 h1:s7DLGDK45Dyfg7++yxI0khrfwq9661w9EN78eP/UZVs=
+github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
 github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
 github.com/ziutek/mymysql v1.5.4/go.mod h1:LMSpPZ6DbqWFxNCHW77HeMg9I646SAhApZ/wKdgO/C0=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
@@ -672,6 +686,8 @@ go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
+go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
diff --git a/i18n/en_US.yaml b/i18n/en_US.yaml
index 5d1faa3e0..58c45acfc 100644
--- a/i18n/en_US.yaml
+++ b/i18n/en_US.yaml
@@ -155,6 +155,8 @@ backend:
     password:
       space_invalid:
         other: Password cannot contain spaces.
+      confirmation_mismatch:
+        other: The two passwords do not match.
     admin:
       cannot_update_their_password:
         other: You cannot modify your password.
@@ -187,6 +189,10 @@ backend:
     email:
       duplicate:
         other: Email already exists.
+      verification_code_invalid:
+        other: The email verification code is invalid or has expired.
+      send_too_frequent:
+        other: Email verification codes are being sent too frequently. Please try again later.
       need_to_be_verified:
         other: Email should be verified.
       verify_url_expired:
@@ -237,6 +243,11 @@ backend:
         other: Content cannot be empty.
       content_less_than_minimum:
         other: Not enough content entered.
+    forum_section:
+      invalid:
+        other: Please select a valid campus section.
+      admin_only:
+        other: Only administrators can publish site announcements.
     rank:
       fail_to_meet_the_condition:
         other: Reputation rank fail to meet the condition.
@@ -518,6 +529,11 @@ backend:
         other: "[{{.SiteName}}] Confirm your new account"
       body:
         other: "Welcome to {{.SiteName}}!<br><br>\n\nClick the following link to confirm and activate your new account:<br>\n<a href='{{.RegisterUrl}}' target='_blank'>{{.RegisterUrl}}</a><br><br>\n\nIf the above link is not clickable, try copying and pasting it into the address bar of your web browser.\n<br><br>\n\n--<br>\nNote: This is an automatic system email, please do not reply to this message as your response will not be seen."
+    register_code:
+      title:
+        other: "[{{.SiteName}}] Registration verification code"
+      body:
+        other: "Welcome to {{.SiteName}}!<br><br>\n\nYour registration verification code is:<br>\n<strong style='font-size:24px;letter-spacing:4px'>{{.Code}}</strong><br><br>\n\nThis code expires in {{.ExpiresMinutes}} minutes. If you did not request it, please ignore this email."
     test:
       title:
         other: "[{{.SiteName}}] Test Email"
@@ -1107,7 +1123,7 @@ ui:
     react_emoji: react with {{ emoji }}
     unreact_emoji: unreact with {{ emoji }}
   comment:
-    btn_add_comment: Add comment
+    btn_add_comment: Add reply
     reply_to: Reply to
     btn_reply: Reply
     btn_edit: Edit
@@ -1115,24 +1131,23 @@ ui:
     btn_flag: Flag
     btn_save_edits: Save edits
     btn_cancel: Cancel
-    show_more: "{{count}} more comments"
+    show_more: "{{count}} more replies"
     tip_question: >-
-      Use comments to ask for more information or suggest improvements. Avoid
-      answering questions in comments.
+      Use replies to add information or suggest improvements.
     tip_answer: >-
-      Use comments to reply to other users or notify them of changes. If you are
-      adding new information, edit your post instead of commenting.
+      Use replies to join the discussion. Edit the original comment to improve
+      its main content.
     tip_vote: It adds something useful to the post
   edit_answer:
-    title: Edit Answer
-    default_reason: Edit answer
-    default_first_reason: Add answer
+    title: Edit Comment
+    default_reason: Edit comment
+    default_first_reason: Add comment
     form:
       fields:
         revision:
           label: Revision
         answer:
-          label: Answer
+          label: Comment
           feedback:
             characters: content must be at least 6 characters in length.
         edit_summary:
@@ -1155,6 +1170,11 @@ ui:
     no_desc: The tag has no description.
     more: More
     wiki: Wiki
+  campus_forum:
+    sections: Campus sections
+    all_sections: All posts
+    admin_only: Admin only
+    last_30_days: Last 30 days
   ask:
     title: Create Question
     edit_title: Edit Question
@@ -1163,11 +1183,17 @@ ui:
     similar_questions: Similar questions
     form:
       fields:
+        section:
+          label: Campus section
+          placeholder: Select a section
+          hint: Your post will appear in the selected campus section.
+          msg:
+            empty: Please select a campus section.
         revision:
           label: Revision
         title:
           label: Title
-          placeholder: What's your topic? Be specific.
+          placeholder: Enter a post title
           msg:
             empty: Title cannot be empty.
             range: Title up to 150 characters
@@ -1179,7 +1205,8 @@ ui:
             optional_body: Describe what the question is about.
             minimum_characters: "Describe what the question is about, at least {{min_content_length}} characters are required."
         tags:
-          label: Tags
+          label: Tags (optional)
+          hint: Add relevant tags when possible to help others discover and browse your post.
           msg:
             empty: Tags cannot be empty.
         answer:
@@ -1191,10 +1218,10 @@ ui:
           placeholder: >-
             Briefly explain your changes (corrected spelling, fixed grammar,
             improved formatting)
-    btn_post_question: Post your question
+    btn_post_question: Publish post
     btn_save_edits: Save edits
     answer_question: Answer your own question
-    post_question&answer: Post your question and answer
+    post_question&answer: Publish post and answer
   tag_selector:
     add_btn: Add tag
     create_btn: Create new tag
@@ -1203,10 +1230,10 @@ ui:
     hint_zero_tags: Describe what your content is about.
     hint_more_than_one_tag: "Describe what your content is about, at least {{min_tags_number}} tags are required."
     no_result: No tags matched
-    tag_required_text: Required tag (at least one)
+    tag_required_text: Recommended tags
   header:
     nav:
-      question: Questions
+      question: Home
       tag: Tags
       user: Users
       badges: Badges
@@ -1260,11 +1287,29 @@ ui:
       label: Email
       msg:
         empty: Email cannot be empty.
+        invalid: Please enter a valid email address.
+        domain: Only hainanu.edu.cn and alumni.hainanu.edu.cn email addresses are allowed.
     password:
       label: Password
       msg:
         empty: Password cannot be empty.
+        range: Password must be between 8 and 32 characters.
         different: The passwords entered on both sides are inconsistent
+    password_confirm:
+      label: Confirm password
+      msg:
+        empty: Please enter the password again.
+        different: The two passwords do not match.
+    verification_code:
+      label: Email verification code
+      placeholder: 6-digit code
+      send: Send code
+      sending: Sending...
+      resend: Resend in {{seconds}}s
+      sent: Verification code sent. Please check your email.
+      msg:
+        empty: Verification code cannot be empty.
+        invalid: Please enter the 6-digit verification code.
   account_forgot:
     page_title: Forgot Your Password
     btn_name: Send me recovery email
@@ -1356,7 +1401,8 @@ ui:
         label: Location
         placeholder: "City, Country"
     notification:
-      heading: Email Notifications
+      heading: Notifications
+      email_disabled: Replies, comments, mentions, and invitations are shown only as in-app notifications and are not sent by email.
       turn_on: Turn on
       inbox:
         label: Inbox notifications
@@ -1413,8 +1459,8 @@ ui:
     review: Your revision will show after review.
     sent_success: Sent successfully
   related_question:
-    title: Related
-    answers: answers
+    title: Related Posts
+    answers: comments
   linked_question:
     title: Linked
     description: Posts linked to
@@ -1428,50 +1474,50 @@ ui:
   question_detail:
     action: Action
     created: Created
-    Asked: Asked
-    asked: asked
+    Asked: Posted
+    asked: posted
     update: Modified
     Edited: Edited
     edit: edited
     commented: commented
     Views: Viewed
-    Follow: Follow
+    Follow: Follow this post
     Following: Following
-    follow_tip: Follow this question to receive notifications
-    answered: answered
+    follow_tip: Follow this post to receive notifications
+    answered: commented
     closed_in: Closed in
-    show_exist: Show existing question.
+    show_exist: Show related posts.
     useful: Useful
-    question_useful: It is useful and clear
-    question_un_useful: It is unclear or not useful
-    question_bookmark: Bookmark this question
-    answer_useful: It is useful
-    answer_un_useful: It is not useful
+    question_useful: This post is useful and clear
+    question_un_useful: This post is unclear or not useful
+    question_bookmark: Bookmark this post
+    answer_useful: This comment is useful
+    answer_un_useful: This comment is not useful
     answers:
-      title: Answers
+      title: Comments
       score: Score
       newest: Newest
       oldest: Oldest
       btn_accept: Accept
       btn_accepted: Accepted
     write_answer:
-      title: Your Answer
-      edit_answer: Edit my existing answer
-      btn_name: Post your answer
-      add_another_answer: Add another answer
-      confirm_title: Continue to answer
+      title: Add a Comment
+      edit_answer: Edit my comment
+      btn_name: Post Comment
+      add_another_answer: Add another comment
+      confirm_title: Continue commenting
       continue: Continue
       confirm_info: >-
-        <p>Are you sure you want to add another answer?</p><p>You could use the
-        edit link to refine and improve your existing answer, instead.</p>
-      empty: Answer cannot be empty.
+        <p>Are you sure you want to add another comment?</p><p>You could also
+        edit and improve your existing comment.</p>
+      empty: Comment cannot be empty.
       characters: content must be at least 6 characters in length.
       tips:
-        header_1: Thanks for your answer
-        li1_1: Please be sure to <strong>answer the question</strong>. Provide details and share your research.
+        header_1: Thanks for your comment
+        li1_1: Keep your comment relevant to the post and provide helpful information.
         li1_2: Back up any statements you make with references or personal experience.
         header_2: But <strong>avoid</strong> ...
-        li2_1: Asking for help, seeking clarification, or responding to other answers.
+        li2_1: Posting off-topic content or duplicate comments.
     reopen:
       confirm_btn: Reopen
       title: Reopen this post
@@ -1617,18 +1663,18 @@ ui:
     save: Save
     follow_tag_tip: Follow tags to curate your list of questions.
     hot_questions: Hot Questions
-    all_questions: All Questions
+    all_questions: Campus posts
     x_questions: "{{ count }} Questions"
     x_answers: "{{ count }} answers"
     x_posts: "{{ count }} Posts"
     questions: Questions
     answers: Answers
-    newest: Newest
-    active: Active
+    newest: New posts
+    active: Latest replies
     hot: Hot
     frequent: Frequent
     recommend: Recommend
-    score: Score
+    score: Most liked
     unanswered: Unanswered
     modified: modified
     answered: answered
@@ -1642,9 +1688,14 @@ ui:
     answer: answer
     questions: Questions
     question: question
+    posts: Posts
+    post: post
     bookmarks: Bookmarks
     reputation: Reputation
     comments: Comments
+    comment: comment
+    replies: Replies
+    reply: reply
     votes: Votes
     badges: Badges
     newest: Newest
@@ -1659,6 +1710,8 @@ ui:
     about_me_empty: "// Hello, World !"
     top_answers: Top Answers
     top_questions: Top Questions
+    top_comments: Top Comments
+    top_posts: Top Posts
     stats: Stats
     list_empty: No posts found.<br />Perhaps you'd like to select a different tab?
     content_empty: No posts found.
@@ -1672,6 +1725,8 @@ ui:
     x_votes: votes received
     x_answers: answers
     x_questions: questions
+    x_comments: comments
+    x_posts: posts
     recent_badges: Recent Badges
   install:
     title: Installation
@@ -1793,6 +1848,7 @@ ui:
     views: views
     votes: votes
     answers: answers
+    comments: comments
     accepted: Accepted
   page_error:
     http_error: HTTP Error {{ code }}
@@ -1999,6 +2055,12 @@ ui:
       edit_profile: Edit profile
       change_status: Change status
       change_role: Change role
+      make_admin:
+        action: Make forum administrator
+        title: Make forum administrator
+        content: Are you sure you want to make this user a forum administrator? They will receive full access to the administration area and will need to sign in again.
+        confirm: Make administrator
+        success: The user is now a forum administrator.
       show_logs: Show logs
       add_user: Add user
       deactivate_user:
@@ -2488,4 +2550,3 @@ ui:
     copy: Copy to clipboard
     copied: Copied
     external_content_warning: External images/media are not displayed.
-
diff --git a/i18n/zh_CN.yaml b/i18n/zh_CN.yaml
index f16ed9fad..69635348f 100644
--- a/i18n/zh_CN.yaml
+++ b/i18n/zh_CN.yaml
@@ -154,6 +154,8 @@ backend:
     password:
       space_invalid:
         other: 密码不得含有空格。
+      confirmation_mismatch:
+        other: 两次输入的密码不一致。
     admin:
       cannot_update_their_password:
         other: 你无法修改自己的密码。
@@ -186,6 +188,10 @@ backend:
     email:
       duplicate:
         other: 邮箱已存在。
+      verification_code_invalid:
+        other: 邮箱验证码错误或已过期。
+      send_too_frequent:
+        other: 邮箱验证码发送过于频繁，请稍后再试。
       need_to_be_verified:
         other: 邮箱需要验证。
       verify_url_expired:
@@ -236,6 +242,11 @@ backend:
         other: 内容不能为空。
       content_less_than_minimum:
         other: 输入的内容不足。
+    forum_section:
+      invalid:
+        other: 请选择有效的校园板块。
+      admin_only:
+        other: 站务公告仅允许管理员发布。
     rank:
       fail_to_meet_the_condition:
         other: 声望值未达到要求。
@@ -517,6 +528,11 @@ backend:
         other: "[{{.SiteName}}] 确认你的新账户"
       body:
         other: "欢迎加入 {{.SiteName}}！<br><br>\n\n请点击以下链接确认并激活你的新账户：<br>\n<a href='{{.RegisterUrl}}' target='_blank'>{{.RegisterUrl}}</a><br><br>\n\n如果上面的链接不能点击，请将其复制并粘贴到你的浏览器地址栏中。\n<br><br>\n\n--<br>\n这是系统自动发送的电子邮件，请勿回复，因为您的回复将不会被看到"
+    register_code:
+      title:
+        other: "[{{.SiteName}}] 注册验证码"
+      body:
+        other: "欢迎加入 {{.SiteName}}！<br><br>\n\n你的注册验证码是：<br>\n<strong style='font-size:24px;letter-spacing:4px'>{{.Code}}</strong><br><br>\n\n验证码在 {{.ExpiresMinutes}} 分钟内有效。如果不是你本人操作，请忽略此邮件。"
     test:
       title:
         other: "[{{.SiteName}}] 测试邮件"
@@ -1091,7 +1107,7 @@ ui:
     react_emoji: 用 {{ emoji }} 回应
     unreact_emoji: 撤销 {{ emoji }}
   comment:
-    btn_add_comment: 添加评论
+    btn_add_comment: 添加回复
     reply_to: 回复
     btn_reply: 回复
     btn_edit: 编辑
@@ -1099,22 +1115,22 @@ ui:
     btn_flag: 举报
     btn_save_edits: 保存更改
     btn_cancel: 取消
-    show_more: "{{count}} 条剩余评论"
+    show_more: "{{count}} 条剩余回复"
     tip_question: >-
-      使用评论提问更多信息或者提出改进意见。避免在评论里回答问题。
+      使用回复补充信息或提出改进建议。
     tip_answer: >-
-      使用评论对回答者进行回复，或者通知回答者你已更新了问题的内容。如果要补充或者完善问题的内容，请在原问题中更改。
+      使用回复参与讨论；如果要完善主要内容，请编辑原评论。
     tip_vote: 它给帖子添加了一些有用的内容
   edit_answer:
-    title: 编辑回答
-    default_reason: 编辑回答
-    default_first_reason: 添加答案
+    title: 编辑评论
+    default_reason: 编辑评论
+    default_first_reason: 添加评论
     form:
       fields:
         revision:
           label: 编辑历史
         answer:
-          label: 回答内容
+          label: 评论内容
           feedback:
             characters: 内容长度至少 6 个字符
         edit_summary:
@@ -1136,6 +1152,11 @@ ui:
     no_desc: 此标签无描述。
     more: 更多
     wiki: 维基
+  campus_forum:
+    sections: 校园板块
+    all_sections: 全部帖子
+    admin_only: 管理员发布
+    last_30_days: 最近 30 天
   ask:
     title: 创建问题
     edit_title: 编辑问题
@@ -1144,11 +1165,17 @@ ui:
     similar_questions: 相似问题
     form:
       fields:
+        section:
+          label: 校园板块
+          placeholder: 请选择发帖板块
+          hint: 帖子发布后会展示在所选板块中。
+          msg:
+            empty: 请选择一个校园板块
         revision:
           label: 修订版本
         title:
           label: 标题
-          placeholder: 你的主题是什么？请具体说明。
+          placeholder: 请输入帖子标题
           msg:
             empty: 标题不能为空。
             range: 标题最多 150 个字符
@@ -1160,7 +1187,8 @@ ui:
             optional_body: 描述这个问题是什么。
             minimum_characters: "详细描述这个问题，至少需要 {{min_content_length}} 字符。"
         tags:
-          label: 标签
+          label: 标签（选填）
+          hint: 建议尽量添加相关标签，方便其他用户发现和浏览帖子。
           msg:
             empty: 必须选择一个标签
         answer:
@@ -1171,10 +1199,10 @@ ui:
           label: 编辑备注
           placeholder: >-
             简单描述更改原因（更正拼写、修复语法、改进格式）
-    btn_post_question: 提交问题
+    btn_post_question: 发布帖子
     btn_save_edits: 保存更改
     answer_question: 回答自己的问题
-    post_question&answer: 提交问题和回答
+    post_question&answer: 发布帖子和回答
   tag_selector:
     add_btn: 添加标签
     create_btn: 创建新标签
@@ -1183,10 +1211,10 @@ ui:
     hint_zero_tags: 描述您的内容与什么有关。
     hint_more_than_one_tag: "描述您的内容是关于什么，至少需要{{min_tags_number}}个标签。"
     no_result: 没有匹配的标签
-    tag_required_text: 必选标签（至少一个）
+    tag_required_text: 推荐标签
   header:
     nav:
-      question: 问题
+      question: 首页
       tag: 标签
       user: 用户
       badges: 徽章
@@ -1238,11 +1266,29 @@ ui:
       label: 邮箱
       msg:
         empty: 邮箱不能为空
+        invalid: 请输入有效的邮箱地址
+        domain: 仅支持 hainanu.edu.cn 学生邮箱和 alumni.hainanu.edu.cn 校友邮箱
     password:
       label: 密码
       msg:
         empty: 密码不能为空
+        range: 密码长度必须在 8 至 32 个字符之间
         different: 两次输入密码不一致
+    password_confirm:
+      label: 确认密码
+      msg:
+        empty: 请再次输入密码
+        different: 两次输入密码不一致
+    verification_code:
+      label: 邮箱验证码
+      placeholder: 请输入 6 位验证码
+      send: 发送验证码
+      sending: 发送中...
+      resend: "{{seconds}} 秒后重发"
+      sent: 验证码已发送，请检查邮箱
+      msg:
+        empty: 邮箱验证码不能为空
+        invalid: 请输入 6 位数字验证码
   account_forgot:
     page_title: 忘记密码
     btn_name: 发送恢复邮件
@@ -1330,7 +1376,8 @@ ui:
         label: 位置
         placeholder: "城市，国家"
     notification:
-      heading: 邮件通知
+      heading: 消息通知
+      email_disabled: 回复、评论、提及和邀请等消息仅通过站内通知展示，不会发送邮件。
       turn_on: 开启
       inbox:
         label: 收件箱通知
@@ -1386,8 +1433,8 @@ ui:
     review: 您的修订将在审阅通过后显示。
     sent_success: 发送成功
   related_question:
-    title: 相似
-    answers: 个回答
+    title: 相关帖子
+    answers: 条评论
   linked_question:
     title: 关联
     description: 帖子关联到
@@ -1401,49 +1448,49 @@ ui:
   question_detail:
     action: 操作
     created: 创建于
-    Asked: 提问于
-    asked: 提问于
+    Asked: 发布于
+    asked: 发布于
     update: 修改于
     Edited: 编辑于
     edit: 编辑于
     commented: 评论
     Views: 阅读次数
-    Follow: 关注此问题
+    Follow: 关注此帖子
     Following: 已关注
-    follow_tip: 关注此问题以接收通知
-    answered: 回答于
+    follow_tip: 关注此帖子以接收通知
+    answered: 评论于
     closed_in: 关闭于
-    show_exist: 查看类似问题。
+    show_exist: 查看相关帖子。
     useful: 有用的
-    question_useful: 它是有用和明确的
-    question_un_useful: 它不明确或没用的
-    question_bookmark: 收藏该问题
-    answer_useful: 这是有用的
-    answer_un_useful: 它是没有用的
+    question_useful: 这个帖子有用且内容明确
+    question_un_useful: 这个帖子内容不明确或没有帮助
+    question_bookmark: 收藏该帖子
+    answer_useful: 这条评论有用
+    answer_un_useful: 这条评论没有用
     answers:
-      title: 个回答
+      title: 条评论
       score: 评分
       newest: 最新
       oldest: 最旧
       btn_accept: 采纳
       btn_accepted: 已被采纳
     write_answer:
-      title: 你的回答
-      edit_answer: 编辑我的回答
-      btn_name: 提交你的回答
-      add_another_answer: 添加另一个回答
-      confirm_title: 继续回答
+      title: 发表评论
+      edit_answer: 编辑我的评论
+      btn_name: 提交评论
+      add_another_answer: 添加另一条评论
+      confirm_title: 继续发表评论
       continue: 继续
       confirm_info: >-
-        <p>你确定要提交一个新的回答吗？</p><p>作为替代，你可以通过编辑来完善和改进之前的回答。</p>
-      empty: 回答内容不能为空。
+        <p>你确定要提交一条新评论吗？</p><p>你也可以编辑并完善之前发表的评论。</p>
+      empty: 评论内容不能为空。
       characters: 内容长度至少 6 个字符。
       tips:
-        header_1: 感谢你的回答
-        li1_1: 请务必确定在 <strong>回答问题</strong>。提供详细信息并分享你的研究。
+        header_1: 感谢你的评论
+        li1_1: 请围绕帖子主题发表评论，并提供有帮助的信息。
         li1_2: 用参考资料或个人经历来支持你所做的任何陈述。
         header_2: 但是 <strong>请避免</strong>...
-        li2_1: 请求帮助，寻求澄清，或答复其他答案。
+        li2_1: 发布与帖子主题无关的内容或重复评论。
     reopen:
       confirm_btn: 重新打开
       title: 重新打开这个帖子
@@ -1582,18 +1629,18 @@ ui:
     save: 保存
     follow_tag_tip: 关注标签来筛选你的问题列表。
     hot_questions: 热门问题
-    all_questions: 全部问题
+    all_questions: 校园帖子
     x_questions: "{{ count }} 个问题"
     x_answers: "{{ count }} 个回答"
     x_posts: "{{ count }} 个帖子"
     questions: 问题
     answers: 回答
-    newest: 最新
-    active: 活跃
+    newest: 最新发表
+    active: 最新回复
     hot: 热门
     frequent: 频繁的
     recommend: 推荐
-    score: 评分
+    score: 点赞热门
     unanswered: 未回答
     modified: 更新于
     answered: 回答于
@@ -1607,9 +1654,14 @@ ui:
     answer: 回答
     questions: 问题
     question: 问题
+    posts: 帖子
+    post: 帖子
     bookmarks: 收藏
     reputation: 声望
     comments: 评论
+    comment: 评论
+    replies: 回复
+    reply: 回复
     votes: 得票
     badges: 徽章
     newest: 最新
@@ -1624,6 +1676,8 @@ ui:
     about_me_empty: "// Hello, World!"
     top_answers: 高分回答
     top_questions: 高分问题
+    top_comments: 热门评论
+    top_posts: 热门帖子
     stats: 状态
     list_empty: 没有找到相关的内容。<br />试试看其他选项卡？
     content_empty: 未找到帖子。
@@ -1637,6 +1691,8 @@ ui:
     x_votes: 得票
     x_answers: 个回答
     x_questions: 个问题
+    x_comments: 条评论
+    x_posts: 篇帖子
     recent_badges: 最近的徽章
   install:
     title: 安装
@@ -1753,6 +1809,7 @@ ui:
     views: 次浏览
     votes: 个点赞
     answers: 个回答
+    comments: 条评论
     accepted: 已被采纳
   page_error:
     http_error: HTTP 错误 {{ code }}
@@ -1958,6 +2015,12 @@ ui:
       edit_profile: 编辑资料
       change_status: 更改状态
       change_role: 更改角色
+      make_admin:
+        action: 设为论坛管理员
+        title: 设为论坛管理员
+        content: 确定要将该用户设为论坛管理员吗？该用户将获得完整的后台管理权限，并且需要重新登录。
+        confirm: 确认设为管理员
+        success: 已将该用户设为论坛管理员。
       show_logs: 显示日志
       add_user: 添加用户
       deactivate_user:
@@ -2353,7 +2416,7 @@ ui:
     proposed: 提案
     question_edit: 问题编辑
     answer_edit: 回答编辑
-    tag_edit: '标签管理: 编辑标签'
+    tag_edit: "标签管理: 编辑标签"
     edit_summary: 编辑备注
     edit_question: 编辑问题
     edit_answer: 编辑回答
@@ -2382,7 +2445,7 @@ ui:
     upvote: 点赞
     accept: 采纳
     cancelled: 已取消
-    commented: '评论:'
+    commented: "评论:"
     rollback: 回滚
     edited: 最后编辑于
     answered: 回答于
@@ -2446,5 +2509,3 @@ ui:
     copy: 复制到剪贴板
     copied: 已复制
     external_content_warning: 外部图像/媒体未显示。
-
-
diff --git a/internal/base/conf/conf.go b/internal/base/conf/conf.go
index 04e3a19ba..ac269822f 100644
--- a/internal/base/conf/conf.go
+++ b/internal/base/conf/conf.go
@@ -21,8 +21,11 @@ package conf
 
 import (
 	"bytes"
+	"fmt"
 	"os"
 	"path/filepath"
+	"strconv"
+	"strings"
 
 	"github.com/apache/answer/internal/base/data"
 	"github.com/apache/answer/internal/base/path"
@@ -50,6 +53,15 @@ type envConfigOverrides struct {
 	SwaggerHost        string
 	SwaggerAddressPort string
 	SiteAddr           string
+	TrustedProxies     string
+	CacheType          string
+	RedisHost          string
+	RedisPort          string
+	RedisUsername      string
+	RedisPassword      string
+	RedisDB            string
+	RedisKeyPrefix     string
+	RedisPoolSize      string
 }
 
 func loadEnvs() (envOverrides *envConfigOverrides) {
@@ -57,6 +69,15 @@ func loadEnvs() (envOverrides *envConfigOverrides) {
 		SwaggerHost:        os.Getenv("SWAGGER_HOST"),
 		SwaggerAddressPort: os.Getenv("SWAGGER_ADDRESS_PORT"),
 		SiteAddr:           os.Getenv("SITE_ADDR"),
+		TrustedProxies:     os.Getenv("TRUSTED_PROXIES"),
+		CacheType:          os.Getenv("CACHE_TYPE"),
+		RedisHost:          os.Getenv("REDIS_HOST"),
+		RedisPort:          os.Getenv("REDIS_PORT"),
+		RedisUsername:      os.Getenv("REDIS_USERNAME"),
+		RedisPassword:      os.Getenv("REDIS_PASSWORD"),
+		RedisDB:            os.Getenv("REDIS_DB"),
+		RedisKeyPrefix:     os.Getenv("REDIS_KEY_PREFIX"),
+		RedisPoolSize:      os.Getenv("REDIS_POOL_SIZE"),
 	}
 }
 
@@ -77,22 +98,107 @@ type Data struct {
 
 // SetDefault set default config
 func (c *AllConfig) SetDefault() {
+	if c.Server == nil {
+		c.Server = &Server{}
+	}
+	if c.Server.HTTP == nil {
+		c.Server.HTTP = &server.HTTP{}
+	}
+	if c.Server.HTTP.TrustedProxies == nil {
+		c.Server.HTTP.TrustedProxies = []string{"127.0.0.1", "::1"}
+	}
 	if c.UI == nil {
 		c.UI = &server.UI{}
 	}
+	if c.Data == nil {
+		c.Data = &Data{}
+	}
+	if c.Data.Cache == nil {
+		c.Data.Cache = &data.CacheConf{}
+	}
+
+	// Application configuration defaults to Redis.
+	// Direct NewCache(&CacheConf{}) calls still use Memory for tests.
+	if c.Data.Cache.Type == "" {
+		c.Data.Cache.Type = data.CacheTypeRedis
+	}
+	if c.Data.Cache.Redis.Host == "" {
+		c.Data.Cache.Redis.Host = data.DefaultRedisHost
+	}
+	if c.Data.Cache.Redis.Port == 0 {
+		c.Data.Cache.Redis.Port = data.DefaultRedisPort
+	}
+	if c.Data.Cache.Redis.KeyPrefix == "" {
+		c.Data.Cache.Redis.KeyPrefix = data.DefaultRedisKeyPrefix
+	}
+	if c.Data.Cache.Redis.PoolSize == 0 {
+		c.Data.Cache.Redis.PoolSize = data.DefaultRedisPoolSize
+	}
 }
 
-func (c *AllConfig) SetEnvironmentOverrides() {
+func (c *AllConfig) SetEnvironmentOverrides() error {
 	envs := loadEnvs()
+
 	if envs.SiteAddr != "" {
 		c.Server.HTTP.Addr = envs.SiteAddr
 	}
+	if envs.TrustedProxies != "" {
+		c.Server.HTTP.TrustedProxies = c.Server.HTTP.TrustedProxies[:0]
+		if !strings.EqualFold(strings.TrimSpace(envs.TrustedProxies), "none") {
+			for proxy := range strings.SplitSeq(envs.TrustedProxies, ",") {
+				if proxy = strings.TrimSpace(proxy); proxy != "" {
+					c.Server.HTTP.TrustedProxies = append(c.Server.HTTP.TrustedProxies, proxy)
+				}
+			}
+		}
+	}
 	if envs.SwaggerHost != "" {
 		c.Swaggerui.Host = envs.SwaggerHost
 	}
 	if envs.SwaggerAddressPort != "" {
 		c.Swaggerui.Address = envs.SwaggerAddressPort
 	}
+	if envs.CacheType != "" {
+		c.Data.Cache.Type = envs.CacheType
+	}
+	if envs.RedisHost != "" {
+		c.Data.Cache.Redis.Host = envs.RedisHost
+	}
+	if envs.RedisPort != "" {
+		port, err := strconv.Atoi(envs.RedisPort)
+		if err != nil || port < 1 || port > 65535 {
+			return fmt.Errorf("REDIS_PORT must be an integer between 1 and 65535, got %q", envs.RedisPort)
+		}
+		c.Data.Cache.Redis.Port = port
+	}
+	if envs.RedisUsername != "" {
+		c.Data.Cache.Redis.Username = envs.RedisUsername
+	}
+	if envs.RedisPassword != "" {
+		c.Data.Cache.Redis.Password = envs.RedisPassword
+	}
+	if envs.RedisDB != "" {
+		db, err := strconv.Atoi(envs.RedisDB)
+		if err != nil || db < 0 {
+			return fmt.Errorf("REDIS_DB must be a non-negative integer, got %q", envs.RedisDB)
+		}
+		c.Data.Cache.Redis.DB = db
+	}
+	if envs.RedisKeyPrefix != "" {
+		c.Data.Cache.Redis.KeyPrefix = envs.RedisKeyPrefix
+	}
+	if envs.RedisPoolSize != "" {
+		poolSize, err := strconv.Atoi(envs.RedisPoolSize)
+		if err != nil || poolSize <= 0 {
+			return fmt.Errorf(
+				"REDIS_POOL_SIZE must be a positive integer, got %q",
+				envs.RedisPoolSize,
+			)
+		}
+		c.Data.Cache.Redis.PoolSize = poolSize
+	}
+
+	return nil
 }
 
 // ReadConfig read config
@@ -109,7 +215,9 @@ func ReadConfig(configFilePath string) (c *AllConfig, err error) {
 		return nil, err
 	}
 	c.SetDefault()
-	c.SetEnvironmentOverrides()
+	if err = c.SetEnvironmentOverrides(); err != nil {
+		return nil, err
+	}
 	return c, nil
 }
 
diff --git a/internal/base/conf/conf_test.go b/internal/base/conf/conf_test.go
new file mode 100644
index 000000000..f64e5e9fd
--- /dev/null
+++ b/internal/base/conf/conf_test.go
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package conf
+
+import (
+	"testing"
+
+	"github.com/apache/answer/internal/base/data"
+	"github.com/apache/answer/internal/base/server"
+	"github.com/apache/answer/internal/router"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestConfig() *AllConfig {
+	return &AllConfig{
+		Server:    &Server{HTTP: &server.HTTP{}},
+		Data:      &Data{Cache: &data.CacheConf{}},
+		Swaggerui: &router.SwaggerConfig{},
+	}
+}
+
+func TestRedisConfigDefaults(t *testing.T) {
+	config := newTestConfig()
+	config.SetDefault()
+
+	require.Equal(t, data.CacheTypeRedis, config.Data.Cache.Type)
+	require.Equal(t, data.DefaultRedisHost, config.Data.Cache.Redis.Host)
+	require.Equal(t, data.DefaultRedisPort, config.Data.Cache.Redis.Port)
+	require.Equal(t, data.DefaultRedisKeyPrefix, config.Data.Cache.Redis.KeyPrefix)
+	require.Equal(t, data.DefaultRedisPoolSize, config.Data.Cache.Redis.PoolSize)
+	require.Equal(t, []string{"127.0.0.1", "::1"}, config.Server.HTTP.TrustedProxies)
+}
+
+func TestRedisEnvironmentOverrides(t *testing.T) {
+	t.Setenv("CACHE_TYPE", "redis")
+	t.Setenv("REDIS_HOST", "redis.internal")
+	t.Setenv("REDIS_PORT", "6380")
+	t.Setenv("REDIS_USERNAME", "answer")
+	t.Setenv("REDIS_PASSWORD", "test-password")
+	t.Setenv("REDIS_DB", "3")
+	t.Setenv("REDIS_KEY_PREFIX", "hnu-forum:test:")
+	t.Setenv("REDIS_POOL_SIZE", "40")
+
+	config := newTestConfig()
+	config.SetDefault()
+	require.NoError(t, config.SetEnvironmentOverrides())
+
+	require.Equal(t, "redis", config.Data.Cache.Type)
+	require.Equal(t, "redis.internal", config.Data.Cache.Redis.Host)
+	require.Equal(t, 6380, config.Data.Cache.Redis.Port)
+	require.Equal(t, "answer", config.Data.Cache.Redis.Username)
+	require.Equal(t, "test-password", config.Data.Cache.Redis.Password)
+	require.Equal(t, 3, config.Data.Cache.Redis.DB)
+	require.Equal(t, "hnu-forum:test:", config.Data.Cache.Redis.KeyPrefix)
+	require.Equal(t, 40, config.Data.Cache.Redis.PoolSize)
+}
+
+func TestTrustedProxyEnvironmentOverride(t *testing.T) {
+	t.Setenv("TRUSTED_PROXIES", "10.0.0.2, 10.0.0.0/24")
+	config := newTestConfig()
+	config.SetDefault()
+	require.NoError(t, config.SetEnvironmentOverrides())
+	require.Equal(t, []string{"10.0.0.2", "10.0.0.0/24"}, config.Server.HTTP.TrustedProxies)
+}
+
+func TestTrustedProxyEnvironmentCanDisableProxyTrust(t *testing.T) {
+	t.Setenv("TRUSTED_PROXIES", "none")
+	config := newTestConfig()
+	config.SetDefault()
+	require.NoError(t, config.SetEnvironmentOverrides())
+	require.Empty(t, config.Server.HTTP.TrustedProxies)
+}
+
+func TestInvalidRedisEnvironment(t *testing.T) {
+	t.Setenv("REDIS_PORT", "invalid")
+
+	config := newTestConfig()
+	config.SetDefault()
+	require.Error(t, config.SetEnvironmentOverrides())
+}
diff --git a/internal/base/constant/email_tpl_key.go b/internal/base/constant/email_tpl_key.go
index 2a06783f7..407416e80 100644
--- a/internal/base/constant/email_tpl_key.go
+++ b/internal/base/constant/email_tpl_key.go
@@ -32,8 +32,10 @@ const (
 	EmailTplKeyPassResetTitle = "email_tpl.pass_reset.title"
 	EmailTplKeyPassResetBody  = "email_tpl.pass_reset.body"
 
-	EmailTplKeyRegisterTitle = "email_tpl.register.title"
-	EmailTplKeyRegisterBody  = "email_tpl.register.body"
+	EmailTplKeyRegisterTitle     = "email_tpl.register.title"
+	EmailTplKeyRegisterBody      = "email_tpl.register.body"
+	EmailTplKeyRegisterCodeTitle = "email_tpl.register_code.title"
+	EmailTplKeyRegisterCodeBody  = "email_tpl.register_code.body"
 
 	EmailTplKeyTestTitle = "email_tpl.test.title"
 	EmailTplKeyTestBody  = "email_tpl.test.body"
diff --git a/internal/base/data/atomic_cache.go b/internal/base/data/atomic_cache.go
new file mode 100644
index 000000000..e762b58e0
--- /dev/null
+++ b/internal/base/data/atomic_cache.go
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package data
+
+import (
+	"context"
+	"time"
+)
+
+// SlidingWindowRule describes one reusable Redis sliding-window limit.
+type SlidingWindowRule struct {
+	Key    string
+	Limit  int64
+	Window time.Duration
+}
+
+// AtomicCache exposes cache operations that must remain atomic across app instances.
+type AtomicCache interface {
+	SetIfAbsent(ctx context.Context, key, value string, ttl time.Duration) (stored bool, err error)
+	CheckAndRecordSlidingWindows(
+		ctx context.Context,
+		member string,
+		rules []SlidingWindowRule,
+	) (retryAfter time.Duration, err error)
+	CompareAndDelete(ctx context.Context, key, expected string) (matched bool, err error)
+}
diff --git a/internal/base/data/config.go b/internal/base/data/config.go
index 17a62c9c2..693229d2d 100644
--- a/internal/base/data/config.go
+++ b/internal/base/data/config.go
@@ -19,6 +19,16 @@
 
 package data
 
+const (
+	CacheTypeMemory = "memory"
+	CacheTypeRedis  = "redis"
+
+	DefaultRedisHost      = "127.0.0.1"
+	DefaultRedisPort      = 6379
+	DefaultRedisKeyPrefix = "hnu-forum:"
+	DefaultRedisPoolSize  = 20
+)
+
 // Database database config
 type Database struct {
 	Driver          string `json:"driver" mapstructure:"driver" yaml:"driver"`
@@ -30,5 +40,18 @@ type Database struct {
 
 // CacheConf cache
 type CacheConf struct {
-	FilePath string `json:"file_path" mapstructure:"file_path" yaml:"file_path"`
+	Type     string         `json:"type" mapstructure:"type" yaml:"type"`
+	FilePath string         `json:"file_path" mapstructure:"file_path" yaml:"file_path,omitempty"`
+	Redis    RedisCacheConf `json:"redis" mapstructure:"redis" yaml:"redis"`
+}
+
+// RedisCacheConf configures Redis as the shared application cache.
+type RedisCacheConf struct {
+	Host      string `json:"host" mapstructure:"host" yaml:"host"`
+	Port      int    `json:"port" mapstructure:"port" yaml:"port"`
+	Username  string `json:"username" mapstructure:"username" yaml:"username,omitempty"`
+	Password  string `json:"password" mapstructure:"password" yaml:"password,omitempty"`
+	DB        int    `json:"db" mapstructure:"db" yaml:"db"`
+	KeyPrefix string `json:"key_prefix" mapstructure:"key_prefix" yaml:"key_prefix"`
+	PoolSize  int    `json:"pool_size" mapstructure:"pool_size" yaml:"pool_size,omitempty"`
 }
diff --git a/internal/base/data/data.go b/internal/base/data/data.go
index 7696d8f56..d4c655e64 100644
--- a/internal/base/data/data.go
+++ b/internal/base/data/data.go
@@ -20,7 +20,10 @@
 package data
 
 import (
+	"errors"
+	"fmt"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/apache/answer/pkg/dir"
@@ -96,6 +99,9 @@ func NewDB(debug bool, dataConf *Database) (*xorm.Engine, error) {
 
 // NewCache new cache instance
 func NewCache(c *CacheConf) (cache.Cache, func(), error) {
+	if c == nil {
+		return nil, func() {}, errors.New("cache config is required")
+	}
 	var pluginCache plugin.Cache
 	_ = plugin.CallCache(func(fn plugin.Cache) error {
 		pluginCache = fn
@@ -104,21 +110,43 @@ func NewCache(c *CacheConf) (cache.Cache, func(), error) {
 	if pluginCache != nil {
 		return pluginCache, func() {}, nil
 	}
+	cacheType := strings.ToLower(strings.TrimSpace(c.Type))
+	switch cacheType {
+	case CacheTypeRedis:
+		redisCache, err := NewRedisCache(c.Redis)
+		if err != nil {
+			return nil, func() {}, err
+		}
+		log.Infof("using redis cache with key prefix %s", c.Redis.KeyPrefix)
+		cleanup := func() {
+			if err := redisCache.Close(); err != nil {
+				log.Warn(err)
+			}
+		}
+		return redisCache, cleanup, nil
+	case "", CacheTypeMemory:
+		return newMemoryCache(c)
+	default:
+		return nil, func() {}, fmt.Errorf("unsupported cache type %q", c.Type)
+	}
+}
 
-	// TODO What cache type should be initialized according to the configuration file
+func newMemoryCache(c *CacheConf) (cache.Cache, func(), error) {
 	memCache := memory.NewCache()
 
 	if len(c.FilePath) > 0 {
 		cacheFileDir := filepath.Dir(c.FilePath)
 		log.Debugf("try to create cache directory %s", cacheFileDir)
-		err := dir.CreateDirIfNotExist(cacheFileDir)
-		if err != nil {
+
+		if err := dir.CreateDirIfNotExist(cacheFileDir); err != nil {
 			log.Errorf("create cache dir failed: %s", err)
 		}
+
 		log.Infof("try to load cache file from %s", c.FilePath)
 		if err := memory.Load(memCache, c.FilePath); err != nil {
 			log.Warn(err)
 		}
+
 		go func() {
 			ticker := time.Tick(time.Minute)
 			for range ticker {
@@ -128,11 +156,16 @@ func NewCache(c *CacheConf) (cache.Cache, func(), error) {
 			}
 		}()
 	}
+
 	cleanup := func() {
+		if c.FilePath == "" {
+			return
+		}
 		log.Infof("try to save cache file to %s", c.FilePath)
 		if err := memory.Save(memCache, c.FilePath); err != nil {
 			log.Warn(err)
 		}
 	}
+
 	return memCache, cleanup, nil
 }
diff --git a/internal/base/data/redis_cache.go b/internal/base/data/redis_cache.go
new file mode 100644
index 000000000..dd06f9659
--- /dev/null
+++ b/internal/base/data/redis_cache.go
@@ -0,0 +1,296 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package data
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/segmentfault/pacman/cache"
+)
+
+const (
+	redisPingTimeout = 5 * time.Second
+	redisScanSize    = int64(500)
+)
+
+var _ cache.Cache = (*RedisCache)(nil)
+var _ AtomicCache = (*RedisCache)(nil)
+
+var changeInt64Script = redis.NewScript(`
+  if redis.call("EXISTS", KEYS[1]) == 0 then
+	return redis.error_reply("cache key does not exist")
+  end
+  return redis.call("INCRBY", KEYS[1], ARGV[1])
+  `)
+
+var slidingWindowScript = redis.NewScript(`
+  local now = tonumber(ARGV[1])
+  local member = ARGV[2]
+  local max_retry_after = 0
+
+  for index, key in ipairs(KEYS) do
+    local limit = tonumber(ARGV[2 + index * 2 - 1])
+    local window = tonumber(ARGV[2 + index * 2])
+    redis.call("ZREMRANGEBYSCORE", key, "-inf", now - window)
+    local count = redis.call("ZCARD", key)
+    if count >= limit then
+      local oldest = redis.call("ZRANGE", key, 0, 0, "WITHSCORES")
+      if #oldest > 0 then
+        local retry_after = tonumber(oldest[2]) + window - now
+        if retry_after > max_retry_after then
+          max_retry_after = retry_after
+        end
+      end
+    end
+  end
+
+  if max_retry_after > 0 then
+    return max_retry_after
+  end
+
+  for index, key in ipairs(KEYS) do
+    local window = tonumber(ARGV[2 + index * 2])
+    redis.call("ZADD", key, now, member)
+    redis.call("PEXPIRE", key, window)
+  end
+  return 0
+  `)
+
+var compareAndDeleteScript = redis.NewScript(`
+  local value = redis.call("GET", KEYS[1])
+  if value and value == ARGV[1] then
+    redis.call("DEL", KEYS[1])
+    return 1
+  end
+  return 0
+  `)
+
+type RedisCache struct {
+	client    *redis.Client
+	keyPrefix string
+}
+
+func NewRedisCache(conf RedisCacheConf) (*RedisCache, error) {
+	host := strings.TrimSpace(conf.Host)
+	keyPrefix := strings.TrimSpace(conf.KeyPrefix)
+
+	if host == "" {
+		return nil, errors.New("redis cache host is required")
+	}
+	if conf.Port < 1 || conf.Port > 65535 {
+		return nil, fmt.Errorf("redis cache port must be between 1 and 65535, got %d", conf.Port)
+	}
+	if conf.DB < 0 {
+		return nil, fmt.Errorf("redis cache db must be non-negative, got %d", conf.DB)
+	}
+	if conf.PoolSize < 0 {
+		return nil, fmt.Errorf("redis cache pool size must be non-negative, got %d", conf.PoolSize)
+	}
+	if err := validateRedisKeyPrefix(keyPrefix); err != nil {
+		return nil, err
+	}
+
+	poolSize := conf.PoolSize
+	if poolSize <= 0 {
+		poolSize = DefaultRedisPoolSize
+	}
+	options := &redis.Options{
+		Addr:         net.JoinHostPort(host, strconv.Itoa(conf.Port)),
+		Username:     conf.Username,
+		Password:     conf.Password,
+		DB:           conf.DB,
+		PoolSize:     poolSize,
+		DialTimeout:  redisPingTimeout,
+		ReadTimeout:  redisPingTimeout,
+		WriteTimeout: redisPingTimeout,
+	}
+	client := redis.NewClient(options)
+	ctx, cancel := context.WithTimeout(context.Background(), redisPingTimeout)
+	defer cancel()
+	if err := client.Ping(ctx).Err(); err != nil {
+		_ = client.Close()
+		return nil, fmt.Errorf("connect to redis at %s: %w", options.Addr, err)
+	}
+	return &RedisCache{
+		client:    client,
+		keyPrefix: keyPrefix,
+	}, nil
+}
+
+// validateRedisKeyPrefix prevents one deployment from clearing another
+// deployment's keys when Flush scans the shared Redis database.
+func validateRedisKeyPrefix(prefix string) error {
+	if prefix == "" {
+		return errors.New("redis cache key prefix is required")
+	}
+	if !strings.HasSuffix(prefix, ":") {
+		return errors.New("redis cache key prefix must end with ':'")
+	}
+	if strings.ContainsAny(prefix, "*?[]\\") {
+		return errors.New("redis cache key prefix contains unsupported pattern characters")
+	}
+	return nil
+}
+
+func (c *RedisCache) key(key string) string {
+	return c.keyPrefix + key
+}
+
+// GetString returns a cached string.
+func (c *RedisCache) GetString(ctx context.Context, key string) (string, bool, error) {
+	value, err := c.client.Get(ctx, c.key(key)).Result()
+	if errors.Is(err, redis.Nil) {
+		return "", false, nil
+	}
+	if err != nil {
+		return "", false, err
+	}
+	return value, true, nil
+}
+
+// SetString stores a string with an optional TTL. A zero TTL does not expire,
+// matching the existing memory cache behavior.
+func (c *RedisCache) SetString(ctx context.Context, key string, value string, ttl time.Duration) error {
+	return c.client.Set(ctx, c.key(key), value, ttl).Err()
+}
+
+// SetIfAbsent stores a value only when the key does not already exist.
+func (c *RedisCache) SetIfAbsent(ctx context.Context, key, value string, ttl time.Duration) (bool, error) {
+	return c.client.SetNX(ctx, c.key(key), value, ttl).Result()
+}
+
+// GetInt64 returns a cached int64.
+func (c *RedisCache) GetInt64(ctx context.Context, key string) (int64, bool, error) {
+	value, exist, err := c.GetString(ctx, key)
+	if err != nil || !exist {
+		return 0, exist, err
+	}
+
+	result, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		return 0, true, fmt.Errorf("parse cached int64: %w", err)
+	}
+
+	return result, true, nil
+}
+
+// SetInt64 stores an int64 with an optional TTL.
+func (c *RedisCache) SetInt64(ctx context.Context, key string, value int64, ttl time.Duration) error {
+	return c.client.Set(ctx, c.key(key), value, ttl).Err()
+}
+
+// Increase atomically increments an existing int64 and preserves its TTL.
+func (c *RedisCache) Increase(ctx context.Context, key string, value int64) (int64, error) {
+	return c.changeExistingInt64(ctx, key, value)
+}
+
+// Decrease atomically decrements an existing int64 and preserves its TTL.
+func (c *RedisCache) Decrease(ctx context.Context, key string, value int64) (int64, error) {
+	return c.changeExistingInt64(ctx, key, -value)
+}
+
+func (c *RedisCache) changeExistingInt64(ctx context.Context, key string, delta int64) (int64, error) {
+	result, err := changeInt64Script.Run(ctx, c.client, []string{c.key(key)}, delta).Int64()
+	if err != nil {
+		return 0, err
+	}
+	return result, nil
+}
+
+// Del deletes one cache key.
+func (c *RedisCache) Del(ctx context.Context, key string) error {
+	return c.client.Del(ctx, c.key(key)).Err()
+}
+
+// CheckAndRecordSlidingWindows checks all rules and records the request only
+// when every rule allows it. The Lua script keeps this atomic across instances.
+func (c *RedisCache) CheckAndRecordSlidingWindows(
+	ctx context.Context,
+	member string,
+	rules []SlidingWindowRule,
+) (time.Duration, error) {
+	if len(rules) == 0 {
+		return 0, nil
+	}
+	if member == "" {
+		return 0, errors.New("sliding window member is required")
+	}
+
+	keys := make([]string, 0, len(rules))
+	args := make([]any, 0, 2+len(rules)*2)
+	args = append(args, time.Now().UnixMilli(), member)
+	for _, rule := range rules {
+		if rule.Key == "" || rule.Limit <= 0 || rule.Window <= 0 {
+			return 0, errors.New("invalid sliding window rule")
+		}
+		keys = append(keys, c.key(rule.Key))
+		args = append(args, rule.Limit, rule.Window.Milliseconds())
+	}
+
+	retryAfterMilliseconds, err := slidingWindowScript.Run(ctx, c.client, keys, args...).Int64()
+	if err != nil {
+		return 0, err
+	}
+	return time.Duration(retryAfterMilliseconds) * time.Millisecond, nil
+}
+
+// CompareAndDelete consumes a value only when it matches the expected value.
+func (c *RedisCache) CompareAndDelete(ctx context.Context, key, expected string) (bool, error) {
+	result, err := compareAndDeleteScript.Run(ctx, c.client, []string{c.key(key)}, expected).Int64()
+	if err != nil {
+		return false, err
+	}
+	return result == 1, nil
+}
+
+// Flush deletes only keys in this deployment's namespace. It never issues
+// FLUSHDB or FLUSHALL because the Redis database may be shared.
+func (c *RedisCache) Flush(ctx context.Context) error {
+	var cursor uint64
+	pattern := c.keyPrefix + "*"
+
+	for {
+		keys, nextCursor, err := c.client.Scan(ctx, cursor, pattern, redisScanSize).Result()
+		if err != nil {
+			return err
+		}
+		if len(keys) > 0 {
+			if err := c.client.Del(ctx, keys...).Err(); err != nil {
+				return err
+			}
+		}
+		cursor = nextCursor
+		if cursor == 0 {
+			return nil
+		}
+	}
+}
+
+// Close releases the Redis connection pool.
+func (c *RedisCache) Close() error {
+	return c.client.Close()
+}
diff --git a/internal/base/data/redis_cache_test.go b/internal/base/data/redis_cache_test.go
new file mode 100644
index 000000000..7f94456df
--- /dev/null
+++ b/internal/base/data/redis_cache_test.go
@@ -0,0 +1,340 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package data
+
+import (
+	"context"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/alicebob/miniredis/v2"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestRedisCache(
+	t *testing.T,
+) (*RedisCache, *miniredis.Miniredis) {
+	t.Helper()
+
+	server := miniredis.RunT(t)
+
+	redisCache, err := NewRedisCache(RedisCacheConf{
+		Host:      server.Host(),
+		Port:      mustRedisPort(t, server.Port()),
+		KeyPrefix: "hnu-forum:test:",
+		PoolSize:  2,
+	})
+	require.NoError(t, err)
+
+	t.Cleanup(func() {
+		require.NoError(t, redisCache.Close())
+	})
+
+	return redisCache, server
+}
+
+func mustRedisPort(t *testing.T, port string) int {
+	t.Helper()
+	value, err := strconv.Atoi(port)
+	require.NoError(t, err)
+	return value
+}
+
+func TestRedisCacheString(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+	ctx := context.Background()
+
+	value, exist, err := redisCache.GetString(ctx, "missing")
+	require.NoError(t, err)
+	require.False(t, exist)
+	require.Empty(t, value)
+
+	require.NoError(
+		t,
+		redisCache.SetString(ctx, "name", "answer", time.Minute),
+	)
+
+	value, exist, err = redisCache.GetString(ctx, "name")
+	require.NoError(t, err)
+	require.True(t, exist)
+	require.Equal(t, "answer", value)
+
+	require.NoError(t, redisCache.Del(ctx, "name"))
+
+	_, exist, err = redisCache.GetString(ctx, "name")
+	require.NoError(t, err)
+	require.False(t, exist)
+}
+
+func TestRedisCacheTTL(t *testing.T) {
+	redisCache, server := newTestRedisCache(t)
+	ctx := context.Background()
+
+	require.NoError(
+		t,
+		redisCache.SetString(ctx, "temporary", "value", time.Minute),
+	)
+
+	server.FastForward(time.Minute + time.Second)
+
+	_, exist, err := redisCache.GetString(ctx, "temporary")
+	require.NoError(t, err)
+	require.False(t, exist)
+}
+
+func TestRedisCacheSetIfAbsent(t *testing.T) {
+	redisCache, server := newTestRedisCache(t)
+	ctx := context.Background()
+
+	stored, err := redisCache.SetIfAbsent(ctx, "lock", "first", time.Minute)
+	require.NoError(t, err)
+	require.True(t, stored)
+
+	stored, err = redisCache.SetIfAbsent(ctx, "lock", "second", time.Minute)
+	require.NoError(t, err)
+	require.False(t, stored)
+
+	value, exists, err := redisCache.GetString(ctx, "lock")
+	require.NoError(t, err)
+	require.True(t, exists)
+	require.Equal(t, "first", value)
+
+	server.FastForward(time.Minute + time.Second)
+	stored, err = redisCache.SetIfAbsent(ctx, "lock", "third", time.Minute)
+	require.NoError(t, err)
+	require.True(t, stored)
+}
+
+func TestRedisCacheAuthentication(t *testing.T) {
+	server := miniredis.RunT(t)
+	server.RequireAuth("test-password")
+
+	redisCache, err := NewRedisCache(RedisCacheConf{
+		Host:      server.Host(),
+		Port:      mustRedisPort(t, server.Port()),
+		Password:  "test-password",
+		KeyPrefix: "hnu-forum:test:",
+	})
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		require.NoError(t, redisCache.Close())
+	})
+
+	require.NoError(t, redisCache.SetString(context.Background(), "authenticated", "yes", time.Minute))
+}
+
+func TestRedisCacheInt64(t *testing.T) {
+	redisCache, server := newTestRedisCache(t)
+	ctx := context.Background()
+
+	require.NoError(
+		t,
+		redisCache.SetInt64(ctx, "counter", 10, time.Minute),
+	)
+
+	ttlBefore := server.TTL(redisCache.key("counter"))
+
+	value, err := redisCache.Increase(ctx, "counter", 5)
+	require.NoError(t, err)
+	require.Equal(t, int64(15), value)
+
+	value, err = redisCache.Decrease(ctx, "counter", 3)
+	require.NoError(t, err)
+	require.Equal(t, int64(12), value)
+
+	storedValue, exist, err := redisCache.GetInt64(ctx, "counter")
+	require.NoError(t, err)
+	require.True(t, exist)
+	require.Equal(t, int64(12), storedValue)
+
+	ttlAfter := server.TTL(redisCache.key("counter"))
+	require.Equal(t, ttlBefore, ttlAfter)
+}
+
+func TestRedisCacheIncreaseMissingKey(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+
+	_, err := redisCache.Increase(
+		context.Background(),
+		"missing-counter",
+		1,
+	)
+	require.Error(t, err)
+}
+
+func TestRedisCacheSlidingWindows(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+	ctx := context.Background()
+	rules := []SlidingWindowRule{
+		{Key: "rate:email:minute", Limit: 1, Window: time.Minute},
+		{Key: "rate:email:hour", Limit: 5, Window: time.Hour},
+		{Key: "rate:ip:hour", Limit: 100, Window: time.Hour},
+	}
+
+	retryAfter, err := redisCache.CheckAndRecordSlidingWindows(ctx, "request-1", rules)
+	require.NoError(t, err)
+	require.Zero(t, retryAfter)
+
+	retryAfter, err = redisCache.CheckAndRecordSlidingWindows(ctx, "request-2", rules)
+	require.NoError(t, err)
+	require.Greater(t, retryAfter, time.Duration(0))
+	require.LessOrEqual(t, retryAfter, time.Minute)
+}
+
+func TestRedisCacheSlidingWindowsDoNotPartiallyRecordRejectedRequest(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+	ctx := context.Background()
+
+	_, err := redisCache.CheckAndRecordSlidingWindows(ctx, "request-1", []SlidingWindowRule{
+		{Key: "rate:strict", Limit: 1, Window: time.Hour},
+		{Key: "rate:loose", Limit: 10, Window: time.Hour},
+	})
+	require.NoError(t, err)
+
+	retryAfter, err := redisCache.CheckAndRecordSlidingWindows(ctx, "request-2", []SlidingWindowRule{
+		{Key: "rate:strict", Limit: 1, Window: time.Hour},
+		{Key: "rate:loose", Limit: 10, Window: time.Hour},
+	})
+	require.NoError(t, err)
+	require.Greater(t, retryAfter, time.Duration(0))
+	require.Equal(t, int64(1), redisCache.client.ZCard(ctx, redisCache.key("rate:loose")).Val())
+}
+
+func TestRedisCacheCompareAndDelete(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+	ctx := context.Background()
+	require.NoError(t, redisCache.SetString(ctx, "one-time-code", "digest", time.Minute))
+
+	matched, err := redisCache.CompareAndDelete(ctx, "one-time-code", "wrong")
+	require.NoError(t, err)
+	require.False(t, matched)
+
+	matched, err = redisCache.CompareAndDelete(ctx, "one-time-code", "digest")
+	require.NoError(t, err)
+	require.True(t, matched)
+
+	matched, err = redisCache.CompareAndDelete(ctx, "one-time-code", "digest")
+	require.NoError(t, err)
+	require.False(t, matched)
+}
+
+func TestRedisCacheFlushOnlyOwnNamespace(t *testing.T) {
+	redisCache, _ := newTestRedisCache(t)
+	ctx := context.Background()
+
+	require.NoError(
+		t,
+		redisCache.SetString(ctx, "owned", "value", time.Hour),
+	)
+	require.NoError(
+		t,
+		redisCache.client.Set(
+			ctx,
+			"another-project:key",
+			"value",
+			time.Hour,
+		).Err(),
+	)
+
+	require.NoError(t, redisCache.Flush(ctx))
+
+	_, exist, err := redisCache.GetString(ctx, "owned")
+	require.NoError(t, err)
+	require.False(t, exist)
+
+	externalValue, err := redisCache.client.Get(
+		ctx,
+		"another-project:key",
+	).Result()
+	require.NoError(t, err)
+	require.Equal(t, "value", externalValue)
+}
+
+func TestRedisCacheConfigValidation(t *testing.T) {
+	testCases := []struct {
+		name string
+		conf RedisCacheConf
+	}{
+		{
+			name: "missing host",
+			conf: RedisCacheConf{
+				Port:      6379,
+				KeyPrefix: "hnu-forum:test:",
+			},
+		},
+		{
+			name: "invalid port",
+			conf: RedisCacheConf{
+				Host:      "127.0.0.1",
+				Port:      70000,
+				KeyPrefix: "hnu-forum:test:",
+			},
+		},
+		{
+			name: "invalid database",
+			conf: RedisCacheConf{
+				Host:      "127.0.0.1",
+				Port:      6379,
+				DB:        -1,
+				KeyPrefix: "hnu-forum:test:",
+			},
+		},
+		{
+			name: "invalid pool size",
+			conf: RedisCacheConf{
+				Host:      "127.0.0.1",
+				Port:      6379,
+				KeyPrefix: "hnu-forum:test:",
+				PoolSize:  -1,
+			},
+		},
+		{
+			name: "missing prefix",
+			conf: RedisCacheConf{
+				Host: "127.0.0.1",
+				Port: 6379,
+			},
+		},
+		{
+			name: "prefix without separator",
+			conf: RedisCacheConf{
+				Host:      "127.0.0.1",
+				Port:      6379,
+				KeyPrefix: "hnu-forum",
+			},
+		},
+		{
+			name: "prefix with pattern",
+			conf: RedisCacheConf{
+				Host:      "127.0.0.1",
+				Port:      6379,
+				KeyPrefix: "hnu-forum:*:",
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			_, err := NewRedisCache(testCase.conf)
+			require.Error(t, err)
+		})
+	}
+}
diff --git a/internal/base/reason/reason.go b/internal/base/reason/reason.go
index b4c569a03..b34f68fff 100644
--- a/internal/base/reason/reason.go
+++ b/internal/base/reason/reason.go
@@ -48,6 +48,8 @@ const (
 	QuestionUnderReview              = "error.question.under_review"
 	QuestionContentCannotEmpty       = "error.question.content_cannot_empty"
 	QuestionContentLessThanMinimum   = "error.question.content_less_than_minimum"
+	ForumSectionInvalid              = "error.forum_section.invalid"
+	ForumSectionAdminOnly            = "error.forum_section.admin_only"
 	AnswerNotFound                   = "error.answer.not_found"
 	AnswerCannotDeleted              = "error.answer.cannot_deleted"
 	AnswerCannotUpdate               = "error.answer.cannot_update"
@@ -71,6 +73,9 @@ const (
 	EmailVerifyURLExpired            = "error.email.verify_url_expired"
 	EmailNeedToBeVerified            = "error.email.need_to_be_verified"
 	EmailIllegalDomainError          = "error.email.illegal_email_domain_error"
+	EmailVerificationCodeInvalid     = "error.email.verification_code_invalid"
+	EmailSendTooFrequent             = "error.email.send_too_frequent"
+	PasswordConfirmationMismatch     = "error.password.confirmation_mismatch"
 	UserSuspended                    = "error.user.suspended"
 	ObjectNotFound                   = "error.object.not_found"
 	TagNotFound                      = "error.tag.not_found"
diff --git a/internal/base/server/config.go b/internal/base/server/config.go
index 32b1a040d..b909b1eb0 100644
--- a/internal/base/server/config.go
+++ b/internal/base/server/config.go
@@ -21,7 +21,8 @@ package server
 
 // HTTP http config
 type HTTP struct {
-	Addr string `json:"addr" mapstructure:"addr"`
+	Addr           string   `json:"addr" mapstructure:"addr" yaml:"addr"`
+	TrustedProxies []string `json:"trusted_proxies" mapstructure:"trusted_proxies" yaml:"trusted_proxies"`
 }
 
 // UI ui config
diff --git a/internal/cli/config.go b/internal/cli/config.go
index e2445c590..0ebfe31a2 100644
--- a/internal/cli/config.go
+++ b/internal/cli/config.go
@@ -48,7 +48,7 @@ func SetDefaultConfig(dbConf *data.Database, cacheConf *data.CacheConf, field *C
 
 	cache, cacheCleanup, err := data.NewCache(cacheConf)
 	if err != nil {
-		fmt.Println("new cache failed")
+		return fmt.Errorf("initialize cache: %w", err)
 	}
 	defer func() {
 		if cache != nil {
diff --git a/internal/controller/answer_controller.go b/internal/controller/answer_controller.go
index 6e16c6a85..f7d644bf9 100644
--- a/internal/controller/answer_controller.go
+++ b/internal/controller/answer_controller.go
@@ -106,7 +106,7 @@ func (ac *AnswerController) RemoveAnswer(ctx *gin.Context) {
 	}
 	req.CanDelete = canList[0] || objectOwner
 	if !req.CanDelete {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -143,7 +143,7 @@ func (ac *AnswerController) RecoverAnswer(ctx *gin.Context) {
 		return
 	}
 	if !canList[0] {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -239,7 +239,7 @@ func (ac *AnswerController) AddAnswer(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -337,7 +337,7 @@ func (ac *AnswerController) UpdateAnswer(ctx *gin.Context) {
 	req.CanEdit = canList[0] || objectOwner
 	req.NoNeedReview = canList[1] || objectOwner
 	if !req.CanEdit {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -428,7 +428,7 @@ func (ac *AnswerController) AcceptAnswer(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/controller/comment_controller.go b/internal/controller/comment_controller.go
index b9beead94..e44273c5b 100644
--- a/internal/controller/comment_controller.go
+++ b/internal/controller/comment_controller.go
@@ -117,7 +117,7 @@ func (cc *CommentController) AddComment(ctx *gin.Context) {
 	req.CanEdit = canList[1]
 	req.CanDelete = canList[2]
 	if !req.CanAdd {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -166,7 +166,7 @@ func (cc *CommentController) RemoveComment(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -206,7 +206,7 @@ func (cc *CommentController) UpdateComment(ctx *gin.Context) {
 	req.CanEdit = canList[0] || cc.rankService.CheckOperationObjectOwner(ctx, req.UserID, req.CommentID)
 	linkUrlLimitUser := canList[1]
 	if !req.CanEdit {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/controller/controller.go b/internal/controller/controller.go
index c31763bea..bf1eae105 100644
--- a/internal/controller/controller.go
+++ b/internal/controller/controller.go
@@ -32,6 +32,7 @@ var ProviderSetController = wire.NewSet(
 	NewCollectionController,
 	NewUserController,
 	NewQuestionController,
+	NewForumSectionController,
 	NewAnswerController,
 	NewSearchController,
 	NewRevisionController,
diff --git a/internal/controller/forum_section_controller.go b/internal/controller/forum_section_controller.go
new file mode 100644
index 000000000..96fcd6434
--- /dev/null
+++ b/internal/controller/forum_section_controller.go
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package controller
+
+import (
+	"github.com/apache/answer/internal/base/handler"
+	forumsectionservice "github.com/apache/answer/internal/service/forum_section"
+	"github.com/gin-gonic/gin"
+)
+
+type ForumSectionController struct {
+	service *forumsectionservice.Service
+}
+
+func NewForumSectionController(service *forumsectionservice.Service) *ForumSectionController {
+	return &ForumSectionController{service: service}
+}
+
+// List returns the campus section tree.
+// @Summary list campus forum sections
+// @Description returns parent sections and their child sections
+// @Tags Forum Section
+// @Produce json
+// @Success 200 {object} handler.RespBody{data=[]schema.ForumSectionResp}
+// @Router /answer/api/v1/forum/sections [get]
+func (c *ForumSectionController) List(ctx *gin.Context) {
+	sections, err := c.service.ListTree(ctx)
+	handler.HandleResponse(ctx, err, sections)
+}
diff --git a/internal/controller/question_controller.go b/internal/controller/question_controller.go
index 05ad319ab..30f302953 100644
--- a/internal/controller/question_controller.go
+++ b/internal/controller/question_controller.go
@@ -107,7 +107,7 @@ func (qc *QuestionController) RemoveQuestion(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	err = qc.questionService.RemoveQuestion(ctx, req)
@@ -147,11 +147,11 @@ func (qc *QuestionController) OperationQuestion(ctx *gin.Context) {
 	req.CanPin = canList[0]
 	req.CanList = canList[1]
 	if (req.Operation == schema.QuestionOperationPin || req.Operation == schema.QuestionOperationUnPin) && !req.CanPin {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	if (req.Operation == schema.QuestionOperationHide || req.Operation == schema.QuestionOperationShow) && !req.CanList {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	err = qc.questionService.OperationQuestion(ctx, req)
@@ -181,7 +181,7 @@ func (qc *QuestionController) CloseQuestion(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -212,7 +212,7 @@ func (qc *QuestionController) ReopenQuestion(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -399,7 +399,7 @@ func (qc *QuestionController) AddQuestion(ctx *gin.Context) {
 	}()
 
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
-	canList, requireRanks, err := qc.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
+	canList, _, err := qc.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
 		permission.QuestionAdd,
 		permission.QuestionEdit,
 		permission.QuestionDelete,
@@ -415,6 +415,7 @@ func (qc *QuestionController) AddQuestion(ctx *gin.Context) {
 	}
 	linkUrlLimitUser := canList[7]
 	isAdmin := middleware.GetUserIsAdminModerator(ctx)
+	req.IsAdmin = middleware.GetIsAdminFromContext(ctx)
 	if !isAdmin || !linkUrlLimitUser {
 		captchaPass := qc.actionService.ActionRecordVerifyCaptcha(ctx, entity.CaptchaActionQuestion, req.UserID, req.CaptchaID, req.CaptchaCode)
 		if !captchaPass {
@@ -435,7 +436,7 @@ func (qc *QuestionController) AddQuestion(ctx *gin.Context) {
 	req.CanUseReservedTag = canList[5]
 	req.CanAddTag = canList[6]
 	if !req.CanAdd {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -446,9 +447,7 @@ func (qc *QuestionController) AddQuestion(ctx *gin.Context) {
 		return
 	}
 	if !req.CanAddTag && hasNewTag {
-		lang := handler.GetLangByCtx(ctx)
-		msg := translator.TrWithData(lang, reason.NoEnoughRankToOperate, &schema.PermissionTrTplData{Rank: requireRanks[6]})
-		handler.HandleResponse(ctx, errors.Forbidden(reason.NoEnoughRankToOperate).WithMsg(msg), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -520,6 +519,7 @@ func (qc *QuestionController) AddQuestionByAnswer(ctx *gin.Context) {
 
 	linkUrlLimitUser := canList[6]
 	isAdmin := middleware.GetUserIsAdminModerator(ctx)
+	req.IsAdmin = middleware.GetIsAdminFromContext(ctx)
 	if !isAdmin || !linkUrlLimitUser {
 		captchaPass := qc.actionService.ActionRecordVerifyCaptcha(ctx, entity.CaptchaActionQuestion, req.UserID, req.CaptchaID, req.CaptchaCode)
 		if !captchaPass {
@@ -538,7 +538,7 @@ func (qc *QuestionController) AddQuestionByAnswer(ctx *gin.Context) {
 	req.CanReopen = canList[4]
 	req.CanUseReservedTag = canList[5]
 	if !req.CanAdd {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	questionReq := new(schema.QuestionAdd)
@@ -628,7 +628,7 @@ func (qc *QuestionController) UpdateQuestion(ctx *gin.Context) {
 	}
 	req.ID = uid.DeShortID(req.ID)
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
-	canList, requireRanks, err := qc.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
+	canList, _, err := qc.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
 		permission.QuestionEdit,
 		permission.QuestionDelete,
 		permission.QuestionEditWithoutReview,
@@ -661,7 +661,7 @@ func (qc *QuestionController) UpdateQuestion(ctx *gin.Context) {
 	req.CanUseReservedTag = canList[3]
 	req.CanAddTag = canList[4]
 	if !req.CanEdit {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -682,9 +682,7 @@ func (qc *QuestionController) UpdateQuestion(ctx *gin.Context) {
 		return
 	}
 	if !req.CanAddTag && hasNewTag {
-		lang := handler.GetLangByCtx(ctx)
-		msg := translator.TrWithData(lang, reason.NoEnoughRankToOperate, &schema.PermissionTrTplData{Rank: requireRanks[4]})
-		handler.HandleResponse(ctx, errors.Forbidden(reason.NoEnoughRankToOperate).WithMsg(msg), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -730,7 +728,7 @@ func (qc *QuestionController) QuestionRecover(ctx *gin.Context) {
 		return
 	}
 	if !canList[0] {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -783,7 +781,7 @@ func (qc *QuestionController) UpdateQuestionInviteUser(ctx *gin.Context) {
 
 	req.CanInviteOtherToAnswer = canList[0]
 	if !req.CanInviteOtherToAnswer {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	err = qc.questionService.UpdateQuestionInviteUser(ctx, req)
@@ -832,6 +830,26 @@ func (qc *QuestionController) UserTop(ctx *gin.Context) {
 	})
 }
 
+// UserContentTop lists a user's top forum posts and top-level comments.
+// It is a forum-oriented compatibility API over the question/answer model.
+// @Summary UserContentTop
+// @Description List a user's top forum posts and comments
+// @Tags Personal
+// @Accept json
+// @Produce json
+// @Param username query string true "username"
+// @Success 200 {object} handler.RespBody
+// @Router /answer/api/v1/personal/content/top [get]
+func (qc *QuestionController) UserContentTop(ctx *gin.Context) {
+	userName := ctx.Query("username")
+	userID := middleware.GetLoginUserIDFromContext(ctx)
+	postList, commentList, err := qc.questionService.SearchUserTopList(ctx, userName, userID)
+	handler.HandleResponse(ctx, err, gin.H{
+		"posts":    postList,
+		"comments": commentList,
+	})
+}
+
 // PersonalQuestionPage list personal questions
 // @Summary list personal questions
 // @Description list personal questions
diff --git a/internal/controller/report_controller.go b/internal/controller/report_controller.go
index 13b4c0953..2a981fcca 100644
--- a/internal/controller/report_controller.go
+++ b/internal/controller/report_controller.go
@@ -92,7 +92,7 @@ func (rc *ReportController) AddReport(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/controller/revision_controller.go b/internal/controller/revision_controller.go
index 57574375a..86801a846 100644
--- a/internal/controller/revision_controller.go
+++ b/internal/controller/revision_controller.go
@@ -186,7 +186,7 @@ func (rc *RevisionController) CheckCanUpdateRevision(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/controller/tag_controller.go b/internal/controller/tag_controller.go
index 56555cd88..5dffa342d 100644
--- a/internal/controller/tag_controller.go
+++ b/internal/controller/tag_controller.go
@@ -108,7 +108,7 @@ func (tc *TagController) RemoveTag(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	err = tc.tagService.RemoveTag(ctx, req)
@@ -140,7 +140,7 @@ func (tc *TagController) AddTag(ctx *gin.Context) {
 		return
 	}
 	if !canList[0] {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -174,7 +174,7 @@ func (tc *TagController) UpdateTag(ctx *gin.Context) {
 		return
 	}
 	if !canList[0] {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 	req.NoNeedReview = canList[1]
@@ -212,7 +212,7 @@ func (tc *TagController) RecoverTag(ctx *gin.Context) {
 		return
 	}
 	if !canList[0] {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -349,7 +349,7 @@ func (tc *TagController) UpdateTagSynonym(ctx *gin.Context) {
 		return
 	}
 	if !can {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -375,7 +375,7 @@ func (tc *TagController) MergeTag(ctx *gin.Context) {
 
 	isAdminModerator := middleware.GetUserIsAdminModerator(ctx)
 	if !isAdminModerator {
-		handler.HandleResponse(ctx, errors.Forbidden(reason.RankFailToMeetTheCondition), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/controller/user_controller.go b/internal/controller/user_controller.go
index 531d88b45..dfe3472fe 100644
--- a/internal/controller/user_controller.go
+++ b/internal/controller/user_controller.go
@@ -20,6 +20,7 @@
 package controller
 
 import (
+	"net/http"
 	"net/url"
 
 	"github.com/apache/answer/internal/base/constant"
@@ -42,6 +43,11 @@ import (
 	"github.com/segmentfault/pacman/log"
 )
 
+var registrationEmailDomains = []string{
+	"hainanu.edu.cn",
+	"alumni.hainanu.edu.cn",
+}
+
 // UserController user controller
 type UserController struct {
 	userService                   *content.UserService
@@ -275,24 +281,18 @@ func (uc *UserController) UserRegisterByEmail(ctx *gin.Context) {
 	if handler.BindAndCheck(ctx, req) {
 		return
 	}
-	if !checker.EmailInAllowEmailDomain(req.Email, siteInfo.AllowEmailDomains) {
-		handler.HandleResponse(ctx, errors.BadRequest(reason.EmailIllegalDomainError), nil)
+	if !checker.EmailInAllowEmailDomain(req.Email, registrationEmailDomains) {
+		errFields := []*validator.FormErrorField{{
+			ErrorField: "e_mail",
+			ErrorMsg: translator.Tr(
+				handler.GetLangByCtx(ctx),
+				reason.EmailIllegalDomainError,
+			),
+		}}
+		handler.HandleResponse(ctx, errors.BadRequest(reason.EmailIllegalDomainError), errFields)
 		return
 	}
-	req.RequireEmailVerification = siteInfo.RequireEmailVerification
 	req.IP = ctx.ClientIP()
-	isAdmin := middleware.GetUserIsAdminModerator(ctx)
-	if !isAdmin {
-		captchaPass := uc.actionService.ActionRecordVerifyCaptcha(ctx, entity.CaptchaActionEmail, req.IP, req.CaptchaID, req.CaptchaCode)
-		if !captchaPass {
-			errFields := append([]*validator.FormErrorField{}, &validator.FormErrorField{
-				ErrorField: "captcha_code",
-				ErrorMsg:   translator.Tr(handler.GetLangByCtx(ctx), reason.CaptchaVerificationFailed),
-			})
-			handler.HandleResponse(ctx, errors.BadRequest(reason.CaptchaVerificationFailed), errFields)
-			return
-		}
-	}
 
 	resp, errFields, err := uc.userService.UserRegisterByEmail(ctx, req)
 	if len(errFields) > 0 {
@@ -306,6 +306,81 @@ func (uc *UserController) UserRegisterByEmail(ctx *gin.Context) {
 	}
 }
 
+// UserRegisterEmailCodeSend godoc
+// @Summary Send registration email verification code
+// @Description Sends a six-digit registration code after captcha and rate-limit checks
+// @Tags User
+// @Accept json
+// @Produce json
+// @Param data body schema.UserRegisterEmailCodeReq true "UserRegisterEmailCodeReq"
+// @Success 200 {object} handler.RespBody
+// @Failure 429 {object} handler.RespBody{data=schema.RetryAfterResp}
+// @Router /answer/api/v1/user/register/email/code [post]
+func (uc *UserController) UserRegisterEmailCodeSend(ctx *gin.Context) {
+	siteInfo, err := uc.siteInfoCommonService.GetSiteLogin(ctx)
+	if err != nil {
+		handler.HandleResponse(ctx, err, nil)
+		return
+	}
+	if !siteInfo.AllowNewRegistrations || !siteInfo.AllowEmailRegistrations {
+		handler.HandleResponse(ctx, errors.BadRequest(reason.NotAllowedRegistration), nil)
+		return
+	}
+
+	req := &schema.UserRegisterEmailCodeReq{}
+	if handler.BindAndCheck(ctx, req) {
+		return
+	}
+	if !checker.EmailInAllowEmailDomain(req.Email, registrationEmailDomains) {
+		errFields := []*validator.FormErrorField{{
+			ErrorField: "e_mail",
+			ErrorMsg: translator.Tr(
+				handler.GetLangByCtx(ctx),
+				reason.EmailIllegalDomainError,
+			),
+		}}
+		handler.HandleResponse(ctx, errors.BadRequest(reason.EmailIllegalDomainError), errFields)
+		return
+	}
+
+	req.IP = ctx.ClientIP()
+	if !uc.actionService.ActionRecordVerifyCaptcha(
+		ctx,
+		entity.CaptchaActionEmail,
+		req.IP,
+		req.CaptchaID,
+		req.CaptchaCode,
+	) {
+		errFields := []*validator.FormErrorField{{
+			ErrorField: "captcha_code",
+			ErrorMsg: translator.Tr(
+				handler.GetLangByCtx(ctx),
+				reason.CaptchaVerificationFailed,
+			),
+		}}
+		handler.HandleResponse(ctx, errors.BadRequest(reason.CaptchaVerificationFailed), errFields)
+		return
+	}
+
+	retryAfter, errFields, err := uc.userService.UserRegisterEmailCodeSend(ctx, req)
+	if len(errFields) > 0 {
+		for _, field := range errFields {
+			field.ErrorMsg = translator.Tr(handler.GetLangByCtx(ctx), field.ErrorMsg)
+		}
+		handler.HandleResponse(ctx, err, errFields)
+		return
+	}
+	if retryAfter > 0 {
+		handler.HandleResponse(
+			ctx,
+			errors.New(http.StatusTooManyRequests, reason.EmailSendTooFrequent),
+			&schema.RetryAfterResp{RetryAfter: retryAfter},
+		)
+		return
+	}
+	handler.HandleResponse(ctx, err, nil)
+}
+
 // UserVerifyEmail godoc
 // @Summary UserVerifyEmail
 // @Description UserVerifyEmail
diff --git a/internal/controller/vote_controller.go b/internal/controller/vote_controller.go
index 302796677..30727fb67 100644
--- a/internal/controller/vote_controller.go
+++ b/internal/controller/vote_controller.go
@@ -73,15 +73,13 @@ func (vc *VoteController) VoteUp(ctx *gin.Context) {
 	req.ObjectID = uid.DeShortID(req.ObjectID)
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
 
-	can, needRank, err := vc.rankService.CheckVotePermission(ctx, req.UserID, req.ObjectID, true)
+	can, _, err := vc.rankService.CheckVotePermission(ctx, req.UserID, req.ObjectID, true)
 	if err != nil {
 		handler.HandleResponse(ctx, err, nil)
 		return
 	}
 	if !can {
-		lang := handler.GetLangByCtx(ctx)
-		msg := translator.TrWithData(lang, reason.NoEnoughRankToOperate, &schema.PermissionTrTplData{Rank: needRank})
-		handler.HandleResponse(ctx, errors.Forbidden(reason.NoEnoughRankToOperate).WithMsg(msg), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
@@ -128,15 +126,13 @@ func (vc *VoteController) VoteDown(ctx *gin.Context) {
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
 	isAdmin := middleware.GetUserIsAdminModerator(ctx)
 
-	can, needRank, err := vc.rankService.CheckVotePermission(ctx, req.UserID, req.ObjectID, false)
+	can, _, err := vc.rankService.CheckVotePermission(ctx, req.UserID, req.ObjectID, false)
 	if err != nil {
 		handler.HandleResponse(ctx, err, nil)
 		return
 	}
 	if !can {
-		lang := handler.GetLangByCtx(ctx)
-		msg := translator.TrWithData(lang, reason.NoEnoughRankToOperate, &schema.PermissionTrTplData{Rank: needRank})
-		handler.HandleResponse(ctx, errors.Forbidden(reason.NoEnoughRankToOperate).WithMsg(msg), nil)
+		handler.HandleResponse(ctx, errors.Forbidden(reason.ForbiddenError), nil)
 		return
 	}
 
diff --git a/internal/entity/forum_section_entity.go b/internal/entity/forum_section_entity.go
new file mode 100644
index 000000000..65dae79ca
--- /dev/null
+++ b/internal/entity/forum_section_entity.go
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package entity
+
+import "time"
+
+const ForumSectionStatusAvailable = 1
+
+// ForumSection is a fixed campus forum category. Only leaf sections accept posts.
+type ForumSection struct {
+	ID        int64     `xorm:"not null pk BIGINT(20) id"`
+	CreatedAt time.Time `xorm:"created TIMESTAMP created_at"`
+	UpdatedAt time.Time `xorm:"updated TIMESTAMP updated_at"`
+	ParentID  int64     `xorm:"not null default 0 BIGINT(20) INDEX parent_id"`
+	Slug      string    `xorm:"not null unique VARCHAR(50) slug"`
+	Name      string    `xorm:"not null VARCHAR(50) name"`
+	Sort      int       `xorm:"not null default 0 INT(11) sort"`
+	AdminOnly bool      `xorm:"not null default false BOOL admin_only"`
+	Status    int       `xorm:"not null default 1 INT(11) status"`
+}
+
+func (ForumSection) TableName() string {
+	return "forum_section"
+}
diff --git a/internal/entity/question_entity.go b/internal/entity/question_entity.go
index 9e5dcd112..4cdf5b7b4 100644
--- a/internal/entity/question_entity.go
+++ b/internal/entity/question_entity.go
@@ -54,6 +54,7 @@ type Question struct {
 	CreatedAt        time.Time `xorm:"not null default CURRENT_TIMESTAMP TIMESTAMP created_at"`
 	UpdatedAt        time.Time `xorm:"updated_at TIMESTAMP"`
 	UserID           string    `xorm:"not null default 0 BIGINT(20) INDEX user_id"`
+	SectionID        int64     `xorm:"not null default 0 BIGINT(20) INDEX section_id"`
 	InviteUserID     string    `xorm:"TEXT invite_user_id"`
 	LastEditUserID   string    `xorm:"not null default 0 BIGINT(20) last_edit_user_id"`
 	Title            string    `xorm:"not null default '' VARCHAR(150) title"`
diff --git a/internal/migrations/migrations.go b/internal/migrations/migrations.go
index 59fbb7bea..e0e6199c2 100644
--- a/internal/migrations/migrations.go
+++ b/internal/migrations/migrations.go
@@ -110,6 +110,7 @@ var migrations = []Migration{
 	NewMigration("v2.0.1", "change avatar type to text", updateAvatarType, false),
 	NewMigration("v2.0.2", "add reasoning content to ai conversation record", addAIConversationReasoningContent, false),
 	NewMigration("v2.0.3", "add require email verification login setting", addRequireEmailVerification, true),
+	NewMigration("v2.0.4", "add campus forum sections", addCampusForumSections, true),
 }
 
 func GetMigrations() []Migration {
@@ -146,8 +147,9 @@ func ExpectedVersion() int64 {
 func Migrate(debug bool, dbConf *data.Database, cacheConf *data.CacheConf, upgradeToSpecificVersion string) error {
 	cache, cacheCleanup, err := data.NewCache(cacheConf)
 	if err != nil {
-		fmt.Println("new cache failed:", err.Error())
+		return fmt.Errorf("new cache failed: %w", err)
 	}
+	defer cacheCleanup()
 	engine, err := data.NewDB(debug, dbConf)
 	if err != nil {
 		fmt.Println("new database failed: ", err.Error())
@@ -193,8 +195,5 @@ func Migrate(debug bool, dbConf *data.Database, cacheConf *data.CacheConf, upgra
 		}
 		currentDBVersion++
 	}
-	if cache != nil {
-		cacheCleanup()
-	}
 	return nil
 }
diff --git a/internal/migrations/v35.go b/internal/migrations/v35.go
new file mode 100644
index 000000000..85556f0bf
--- /dev/null
+++ b/internal/migrations/v35.go
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package migrations
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/apache/answer/internal/entity"
+	"xorm.io/xorm"
+)
+
+func addCampusForumSections(ctx context.Context, x *xorm.Engine) error {
+	if err := x.Context(ctx).Sync(new(entity.ForumSection), new(entity.Question)); err != nil {
+		return fmt.Errorf("sync campus forum sections failed: %w", err)
+	}
+
+	sections := []*entity.ForumSection{
+		{ID: 1, Slug: "career-future", Name: "前程似锦", Sort: 10, Status: 1},
+		{ID: 2, Slug: "hainanu-campus", Name: "海大校园", Sort: 20, Status: 1},
+		{ID: 3, Slug: "technology-life", Name: "科技生活", Sort: 30, Status: 1},
+		{ID: 4, Slug: "life-information", Name: "生活信息", Sort: 40, Status: 1},
+		{ID: 5, Slug: "site-management", Name: "站务管理", Sort: 50, Status: 1},
+		{ID: 101, ParentID: 1, Slug: "employment-startup", Name: "就业创业", Sort: 101, Status: 1},
+		{ID: 102, ParentID: 1, Slug: "study-abroad", Name: "出国留学", Sort: 102, Status: 1},
+		{ID: 103, ParentID: 1, Slug: "civil-service", Name: "公考选调", Sort: 103, Status: 1},
+		{ID: 104, ParentID: 1, Slug: "postgraduate", Name: "保研考研", Sort: 104, Status: 1},
+		{ID: 201, ParentID: 2, Slug: "freshmen", Name: "新生专区", Sort: 201, Status: 1},
+		{ID: 202, ParentID: 2, Slug: "graduation", Name: "毕业感言", Sort: 202, Status: 1},
+		{ID: 203, ParentID: 2, Slug: "food-entertainment", Name: "吃喝玩乐", Sort: 203, Status: 1},
+		{ID: 204, ParentID: 2, Slug: "campus-matchmaking", Name: "海大鹊桥", Sort: 204, Status: 1},
+		{ID: 205, ParentID: 2, Slug: "campus-hotspot", Name: "校园热点", Sort: 205, Status: 1},
+		{ID: 301, ParentID: 3, Slug: "exams", Name: "考试专区", Sort: 301, Status: 1},
+		{ID: 302, ParentID: 3, Slug: "academic-exchange", Name: "学术交流", Sort: 302, Status: 1},
+		{ID: 303, ParentID: 3, Slug: "programming", Name: "程序之家", Sort: 303, Status: 1},
+		{ID: 304, ParentID: 3, Slug: "competitions", Name: "竞赛专区", Sort: 304, Status: 1},
+		{ID: 401, ParentID: 4, Slug: "second-hand", Name: "二手专区", Sort: 401, Status: 1},
+		{ID: 402, ParentID: 4, Slug: "lost-found", Name: "失物招领", Sort: 402, Status: 1},
+		{ID: 403, ParentID: 4, Slug: "carpool", Name: "拼车同行", Sort: 403, Status: 1},
+		{ID: 404, ParentID: 4, Slug: "part-time-jobs", Name: "兼职信息中心", Sort: 404, Status: 1},
+		{ID: 501, ParentID: 5, Slug: "site-announcements", Name: "站务公告", Sort: 501, AdminOnly: true, Status: 1},
+	}
+	for _, section := range sections {
+		exists, err := x.Context(ctx).ID(section.ID).Exist(new(entity.ForumSection))
+		if err != nil {
+			return err
+		}
+		if !exists {
+			if _, err = x.Context(ctx).Insert(section); err != nil {
+				return fmt.Errorf("insert forum section %s: %w", section.Slug, err)
+			}
+		}
+	}
+	return nil
+}
diff --git a/internal/repo/activity/vote_repo.go b/internal/repo/activity/vote_repo.go
index 389ae18d8..38355e91a 100644
--- a/internal/repo/activity/vote_repo.go
+++ b/internal/repo/activity/vote_repo.go
@@ -198,7 +198,22 @@ func (vr *VoteRepo) ListUserVotes(ctx context.Context, userID string,
 			builder.In("activity_type", activityTypes),
 		)
 
-	session.Where(cond).Desc("updated_at")
+	session.Where(cond)
+	session.And(`(
+		EXISTS (
+			SELECT 1 FROM question
+			WHERE question.id = activity.object_id
+			AND question.status != ?
+		)
+		OR EXISTS (
+			SELECT 1 FROM answer
+			INNER JOIN question ON question.id = answer.question_id
+			WHERE answer.id = activity.object_id
+			AND answer.status != ?
+			AND question.status != ?
+		)
+	)`, entity.QuestionStatusDeleted, entity.AnswerStatusDeleted, entity.QuestionStatusDeleted)
+	session.Desc("updated_at")
 
 	total, err = pager.Help(page, pageSize, &voteList, &entity.Activity{}, session)
 	if err != nil {
diff --git a/internal/repo/answer/answer_repo.go b/internal/repo/answer/answer_repo.go
index 42e3494a8..c103b4a4c 100644
--- a/internal/repo/answer/answer_repo.go
+++ b/internal/repo/answer/answer_repo.go
@@ -394,6 +394,11 @@ func (ar *answerRepo) GetPersonalAnswerPage(ctx context.Context, req *entity.Per
 		UserID: req.UserID,
 	}
 	session := ar.data.DB.Context(ctx)
+	session.And(`EXISTS (
+		SELECT 1 FROM question
+		WHERE question.id = answer.question_id
+		AND question.status != ?
+	)`, entity.QuestionStatusDeleted)
 	switch req.Order {
 	case entity.AnswerSearchOrderByTime:
 		session = session.OrderBy("created_at desc")
diff --git a/internal/repo/collection/collection_repo.go b/internal/repo/collection/collection_repo.go
index 482cb075d..99bd30637 100644
--- a/internal/repo/collection/collection_repo.go
+++ b/internal/repo/collection/collection_repo.go
@@ -207,6 +207,11 @@ func (cr *collectionRepo) SearchList(ctx context.Context, search *entity.Collect
 	} else {
 		return rows, count, nil
 	}
+	session = session.And(`EXISTS (
+		SELECT 1 FROM question
+		WHERE question.id = collection.object_id
+		AND question.status != ?
+	)`, entity.QuestionStatusDeleted)
 	session = session.Limit(search.PageSize, offset)
 	count, err = session.OrderBy("updated_at desc").FindAndCount(&rows)
 	if err != nil {
diff --git a/internal/repo/comment/comment_repo.go b/internal/repo/comment/comment_repo.go
index a0d091053..541d58e19 100644
--- a/internal/repo/comment/comment_repo.go
+++ b/internal/repo/comment/comment_repo.go
@@ -150,6 +150,18 @@ func (cr *commentRepo) GetCommentPage(ctx context.Context, commentQuery *comment
 	session := cr.data.DB.Context(ctx)
 	session.OrderBy(commentQuery.GetOrderBy())
 	session.Where("status = ?", entity.CommentStatusAvailable)
+	if commentQuery.ExcludeDeletedContent {
+		session.And(`EXISTS (
+			SELECT 1 FROM question
+			WHERE question.id = comment.question_id
+			AND question.status != ?
+		)`, entity.QuestionStatusDeleted)
+		session.And(`NOT EXISTS (
+			SELECT 1 FROM answer
+			WHERE answer.id = comment.object_id
+			AND answer.status = ?
+		)`, entity.AnswerStatusDeleted)
+	}
 
 	cond := &entity.Comment{ObjectID: commentQuery.ObjectID, UserID: commentQuery.UserID}
 	total, err = pager.Help(commentQuery.Page, commentQuery.PageSize, &commentList, cond, session)
diff --git a/internal/repo/forum_section/forum_section_repo.go b/internal/repo/forum_section/forum_section_repo.go
new file mode 100644
index 000000000..2dbba5363
--- /dev/null
+++ b/internal/repo/forum_section/forum_section_repo.go
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package forum_section
+
+import (
+	"context"
+	"strings"
+
+	"github.com/apache/answer/internal/base/data"
+	"github.com/apache/answer/internal/base/reason"
+	"github.com/apache/answer/internal/entity"
+	forumsectionservice "github.com/apache/answer/internal/service/forum_section"
+	"github.com/segmentfault/pacman/errors"
+)
+
+type repo struct{ data *data.Data }
+
+func NewForumSectionRepo(dataSource *data.Data) forumsectionservice.Repo {
+	return &repo{data: dataSource}
+}
+
+func (r *repo) List(ctx context.Context) ([]*entity.ForumSection, error) {
+	list := make([]*entity.ForumSection, 0)
+	err := r.data.DB.Context(ctx).Where("status = ?", entity.ForumSectionStatusAvailable).
+		Asc("sort", "id").Find(&list)
+	if err != nil {
+		return nil, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return list, nil
+}
+
+func (r *repo) GetByID(ctx context.Context, id int64) (*entity.ForumSection, bool, error) {
+	section := &entity.ForumSection{ID: id}
+	exists, err := r.data.DB.Context(ctx).Get(section)
+	if err != nil {
+		return nil, false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return section, exists, nil
+}
+
+func (r *repo) GetBySlug(ctx context.Context, slug string) (*entity.ForumSection, bool, error) {
+	section := &entity.ForumSection{}
+	exists, err := r.data.DB.Context(ctx).Where("slug = ?", strings.ToLower(strings.TrimSpace(slug))).Get(section)
+	if err != nil {
+		return nil, false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return section, exists, nil
+}
diff --git a/internal/repo/provider.go b/internal/repo/provider.go
index 510a94aaa..ead2a24fb 100644
--- a/internal/repo/provider.go
+++ b/internal/repo/provider.go
@@ -36,6 +36,7 @@ import (
 	"github.com/apache/answer/internal/repo/config"
 	"github.com/apache/answer/internal/repo/export"
 	"github.com/apache/answer/internal/repo/file_record"
+	"github.com/apache/answer/internal/repo/forum_section"
 	"github.com/apache/answer/internal/repo/limit"
 	"github.com/apache/answer/internal/repo/meta"
 	"github.com/apache/answer/internal/repo/notification"
@@ -43,6 +44,7 @@ import (
 	"github.com/apache/answer/internal/repo/question"
 	"github.com/apache/answer/internal/repo/rank"
 	"github.com/apache/answer/internal/repo/reason"
+	"github.com/apache/answer/internal/repo/registration"
 	"github.com/apache/answer/internal/repo/report"
 	"github.com/apache/answer/internal/repo/review"
 	"github.com/apache/answer/internal/repo/revision"
@@ -93,6 +95,7 @@ var ProviderSetRepo = wire.NewSet(
 	search_common.NewSearchRepo,
 	meta.NewMetaRepo,
 	export.NewEmailRepo,
+	registration.NewRegistrationRepo,
 	reason.NewReasonRepo,
 	site_info.NewSiteInfo,
 	notification.NewNotificationRepo,
@@ -111,6 +114,7 @@ var ProviderSetRepo = wire.NewSet(
 	badge_group.NewBadgeGroupRepo,
 	badge_award.NewBadgeAwardRepo,
 	file_record.NewFileRecordRepo,
+	forum_section.NewForumSectionRepo,
 	api_key.NewAPIKeyRepo,
 	ai_conversation.NewAIConversationRepo,
 )
diff --git a/internal/repo/question/question_repo.go b/internal/repo/question/question_repo.go
index 3449efb8b..a6c3f8152 100644
--- a/internal/repo/question/question_repo.go
+++ b/internal/repo/question/question_repo.go
@@ -393,7 +393,7 @@ func (qr *questionRepo) SitemapQuestions(ctx context.Context, page, pageSize int
 
 // GetQuestionPage query question page
 func (qr *questionRepo) GetQuestionPage(ctx context.Context, page, pageSize int,
-	tagIDs []string, userID, orderCond string, inDays int, showHidden, showPending bool) (
+	tagIDs []string, sectionIDs []int64, userID, orderCond string, inDays int, showHidden, showPending bool) (
 	questionList []*entity.Question, total int64, err error) {
 	questionList = make([]*entity.Question, 0)
 	session := qr.data.DB.Context(ctx)
@@ -411,6 +411,9 @@ func (qr *questionRepo) GetQuestionPage(ctx context.Context, page, pageSize int,
 		session.In("tag_rel.tag_id", tagIDs)
 		session.And("tag_rel.status = ?", entity.TagRelStatusAvailable)
 	}
+	if len(sectionIDs) > 0 {
+		session.In("question.section_id", sectionIDs)
+	}
 	if len(userID) > 0 {
 		session.And("question.user_id = ?", userID)
 		if !showHidden {
@@ -420,7 +423,11 @@ func (qr *questionRepo) GetQuestionPage(ctx context.Context, page, pageSize int,
 		session.And("question.show = ?", entity.QuestionShow)
 	}
 	if inDays > 0 {
-		session.And("question.created_at > ?", time.Now().AddDate(0, 0, -inDays))
+		if orderCond == schema.QuestionOrderCondActive {
+			session.And("question.post_update_time > ?", time.Now().AddDate(0, 0, -inDays))
+		} else {
+			session.And("question.created_at > ?", time.Now().AddDate(0, 0, -inDays))
+		}
 	}
 
 	switch orderCond {
diff --git a/internal/repo/registration/registration_repo.go b/internal/repo/registration/registration_repo.go
new file mode 100644
index 000000000..c8da510b1
--- /dev/null
+++ b/internal/repo/registration/registration_repo.go
@@ -0,0 +1,183 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package registration
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/apache/answer/internal/base/data"
+	"github.com/apache/answer/internal/base/reason"
+	registrationservice "github.com/apache/answer/internal/service/registration"
+	"github.com/apache/answer/pkg/token"
+	"github.com/segmentfault/pacman/errors"
+)
+
+const (
+	emailCodeKeyPrefix       = "answer:register:email-code:"
+	emailCodeLockKeyPrefix   = "answer:register:email-code-lock:"
+	emailMinuteRateKeyPrefix = "answer:register:rate:email-minute:"
+	emailHourRateKeyPrefix   = "answer:register:rate:email-hour:"
+	ipHourRateKeyPrefix      = "answer:register:rate:ip-hour:"
+)
+
+type registrationRepo struct {
+	data *data.Data
+}
+
+// NewRegistrationRepo creates the Redis-backed registration security repository.
+func NewRegistrationRepo(dataSource *data.Data) registrationservice.SecurityRepo {
+	return &registrationRepo{data: dataSource}
+}
+
+func (r *registrationRepo) CheckAndRecordSendLimit(
+	ctx context.Context,
+	email, ip string,
+) (time.Duration, error) {
+	atomicCache, ok := r.data.Cache.(data.AtomicCache)
+	if !ok {
+		return 0, errors.InternalServer(reason.DatabaseError).
+			WithError(fmt.Errorf("registration rate limiting requires an atomic cache")).
+			WithStack()
+	}
+
+	emailHash := hashValue(normalizeEmail(email))
+	ipHash := hashValue(strings.TrimSpace(ip))
+	rules := []data.SlidingWindowRule{
+		{Key: emailMinuteRateKeyPrefix + emailHash, Limit: 1, Window: registrationservice.EmailCooldown},
+		{Key: emailHourRateKeyPrefix + emailHash, Limit: registrationservice.EmailHourlyLimit, Window: registrationservice.EmailHourlyWindow},
+		{Key: ipHourRateKeyPrefix + ipHash, Limit: registrationservice.IPHourlyLimit, Window: registrationservice.IPHourlyWindow},
+	}
+
+	retryAfter, err := atomicCache.CheckAndRecordSlidingWindows(ctx, token.GenerateToken(), rules)
+	if err != nil {
+		return 0, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return retryAfter, nil
+}
+
+func (r *registrationRepo) SaveEmailCode(
+	ctx context.Context,
+	email, code string,
+	ttl time.Duration,
+) error {
+	err := r.data.Cache.SetString(ctx, emailCodeKey(email), codeDigest(email, code), ttl)
+	if err != nil {
+		return errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return nil
+}
+
+func (r *registrationRepo) VerifyAndLockEmailCode(
+	ctx context.Context,
+	email, code string,
+) (string, bool, error) {
+	atomicCache, ok := r.data.Cache.(data.AtomicCache)
+	if !ok {
+		return "", false, errors.InternalServer(reason.DatabaseError).
+			WithError(fmt.Errorf("registration code verification requires an atomic cache")).
+			WithStack()
+	}
+
+	verificationToken := token.GenerateToken()
+	locked, err := atomicCache.SetIfAbsent(
+		ctx,
+		emailCodeLockKey(email),
+		verificationToken,
+		registrationservice.EmailCodeVerificationLockTTL,
+	)
+	if err != nil {
+		return "", false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	if !locked {
+		return "", false, nil
+	}
+
+	storedDigest, exists, err := r.data.Cache.GetString(ctx, emailCodeKey(email))
+	if err != nil {
+		_ = r.ReleaseEmailCodeLock(ctx, email, verificationToken)
+		return "", false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	if !exists || storedDigest != codeDigest(email, code) {
+		if err = r.ReleaseEmailCodeLock(ctx, email, verificationToken); err != nil {
+			return "", false, err
+		}
+		return "", false, nil
+	}
+	return verificationToken, true, nil
+}
+
+func (r *registrationRepo) DeleteEmailCodeIfMatches(ctx context.Context, email, code string) (bool, error) {
+	atomicCache, ok := r.data.Cache.(data.AtomicCache)
+	if !ok {
+		return false, errors.InternalServer(reason.DatabaseError).
+			WithError(fmt.Errorf("registration code deletion requires an atomic cache")).
+			WithStack()
+	}
+
+	matched, err := atomicCache.CompareAndDelete(ctx, emailCodeKey(email), codeDigest(email, code))
+	if err != nil {
+		return false, errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return matched, nil
+}
+
+func (r *registrationRepo) ReleaseEmailCodeLock(
+	ctx context.Context,
+	email, verificationToken string,
+) error {
+	atomicCache, ok := r.data.Cache.(data.AtomicCache)
+	if !ok {
+		return errors.InternalServer(reason.DatabaseError).
+			WithError(fmt.Errorf("registration code lock release requires an atomic cache")).
+			WithStack()
+	}
+
+	_, err := atomicCache.CompareAndDelete(ctx, emailCodeLockKey(email), verificationToken)
+	if err != nil {
+		return errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
+	}
+	return nil
+}
+
+func emailCodeKey(email string) string {
+	return emailCodeKeyPrefix + hashValue(normalizeEmail(email))
+}
+
+func emailCodeLockKey(email string) string {
+	return emailCodeLockKeyPrefix + hashValue(normalizeEmail(email))
+}
+
+func codeDigest(email, code string) string {
+	return hashValue(normalizeEmail(email) + "\x00" + code)
+}
+
+func hashValue(value string) string {
+	digest := sha256.Sum256([]byte(value))
+	return hex.EncodeToString(digest[:])
+}
+
+func normalizeEmail(email string) string {
+	return strings.ToLower(strings.TrimSpace(email))
+}
diff --git a/internal/repo/registration/registration_repo_test.go b/internal/repo/registration/registration_repo_test.go
new file mode 100644
index 000000000..ec6b2c588
--- /dev/null
+++ b/internal/repo/registration/registration_repo_test.go
@@ -0,0 +1,154 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package registration
+
+import (
+	"context"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/alicebob/miniredis/v2"
+	"github.com/apache/answer/internal/base/data"
+	"github.com/stretchr/testify/require"
+)
+
+func newRegistrationTestRepo(t *testing.T) (*registrationRepo, *miniredis.Miniredis) {
+	t.Helper()
+	server := miniredis.RunT(t)
+	port, err := strconv.Atoi(server.Port())
+	require.NoError(t, err)
+	redisCache, err := data.NewRedisCache(data.RedisCacheConf{
+		Host: server.Host(), Port: port, KeyPrefix: "hnu-forum:test:",
+	})
+	require.NoError(t, err)
+	t.Cleanup(func() { require.NoError(t, redisCache.Close()) })
+	return &registrationRepo{data: &data.Data{Cache: redisCache}}, server
+}
+
+func TestRegistrationEmailCodeIsKeptUntilDeletedAfterSuccessfulRegistration(t *testing.T) {
+	repo, _ := newRegistrationTestRepo(t)
+	ctx := context.Background()
+	require.NoError(t, repo.SaveEmailCode(ctx, "Student@HAINANU.EDU.CN", "012345", time.Minute))
+
+	verificationToken, matched, err := repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "999999")
+	require.NoError(t, err)
+	require.False(t, matched)
+	require.Empty(t, verificationToken)
+
+	verificationToken, matched, err = repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.True(t, matched)
+	require.NotEmpty(t, verificationToken)
+
+	// Simulate a database insertion failure: releasing the lock must retain the code.
+	require.NoError(t, repo.ReleaseEmailCodeLock(ctx, "student@hainanu.edu.cn", verificationToken))
+
+	verificationToken, matched, err = repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.True(t, matched)
+
+	deleted, err := repo.DeleteEmailCodeIfMatches(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.True(t, deleted)
+	require.NoError(t, repo.ReleaseEmailCodeLock(ctx, "student@hainanu.edu.cn", verificationToken))
+
+	_, matched, err = repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.False(t, matched)
+}
+
+func TestRegistrationEmailCodeVerificationIsLockedPerEmail(t *testing.T) {
+	repo, _ := newRegistrationTestRepo(t)
+	ctx := context.Background()
+	require.NoError(t, repo.SaveEmailCode(ctx, "student@hainanu.edu.cn", "012345", time.Minute))
+
+	verificationToken, matched, err := repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.True(t, matched)
+
+	_, matched, err = repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.False(t, matched)
+
+	require.NoError(t, repo.ReleaseEmailCodeLock(ctx, "student@hainanu.edu.cn", verificationToken))
+}
+
+func TestDeletingVerifiedCodeDoesNotDeleteNewerCode(t *testing.T) {
+	repo, _ := newRegistrationTestRepo(t)
+	ctx := context.Background()
+	require.NoError(t, repo.SaveEmailCode(ctx, "student@hainanu.edu.cn", "012345", time.Minute))
+
+	verificationToken, matched, err := repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.True(t, matched)
+
+	require.NoError(t, repo.SaveEmailCode(ctx, "student@hainanu.edu.cn", "654321", time.Minute))
+	deleted, err := repo.DeleteEmailCodeIfMatches(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.False(t, deleted)
+	require.NoError(t, repo.ReleaseEmailCodeLock(ctx, "student@hainanu.edu.cn", verificationToken))
+
+	newToken, matched, err := repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "654321")
+	require.NoError(t, err)
+	require.True(t, matched)
+	require.NoError(t, repo.ReleaseEmailCodeLock(ctx, "student@hainanu.edu.cn", newToken))
+}
+
+func TestRegistrationEmailCodeExpires(t *testing.T) {
+	repo, server := newRegistrationTestRepo(t)
+	ctx := context.Background()
+	require.NoError(t, repo.SaveEmailCode(ctx, "student@hainanu.edu.cn", "012345", time.Minute))
+	server.FastForward(time.Minute + time.Second)
+
+	_, matched, err := repo.VerifyAndLockEmailCode(ctx, "student@hainanu.edu.cn", "012345")
+	require.NoError(t, err)
+	require.False(t, matched)
+}
+
+func TestRegistrationSendLimitsUseEmailStrictlyAndIPAsFallback(t *testing.T) {
+	repo, server := newRegistrationTestRepo(t)
+	ctx := context.Background()
+
+	retryAfter, err := repo.CheckAndRecordSendLimit(ctx, "first@hainanu.edu.cn", "203.0.113.10")
+	require.NoError(t, err)
+	require.Zero(t, retryAfter)
+
+	retryAfter, err = repo.CheckAndRecordSendLimit(ctx, "first@hainanu.edu.cn", "203.0.113.10")
+	require.NoError(t, err)
+	require.Greater(t, retryAfter, time.Duration(0))
+
+	// Another email sharing the same campus NAT remains allowed.
+	retryAfter, err = repo.CheckAndRecordSendLimit(ctx, "second@hainanu.edu.cn", "203.0.113.10")
+	require.NoError(t, err)
+	require.Zero(t, retryAfter)
+
+	// Five sends per rolling hour are allowed when the minute cooldown has elapsed.
+	for send := 2; send <= 5; send++ {
+		server.FastForward(time.Minute + time.Second)
+		retryAfter, err = repo.CheckAndRecordSendLimit(ctx, "first@hainanu.edu.cn", "203.0.113.10")
+		require.NoError(t, err)
+		require.Zero(t, retryAfter)
+	}
+	server.FastForward(time.Minute + time.Second)
+	retryAfter, err = repo.CheckAndRecordSendLimit(ctx, "first@hainanu.edu.cn", "203.0.113.10")
+	require.NoError(t, err)
+	require.Greater(t, retryAfter, time.Duration(0))
+}
diff --git a/internal/repo/repo_test/personal_deleted_content_test.go b/internal/repo/repo_test/personal_deleted_content_test.go
new file mode 100644
index 000000000..877e6208c
--- /dev/null
+++ b/internal/repo/repo_test/personal_deleted_content_test.go
@@ -0,0 +1,139 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package repo_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/apache/answer/internal/base/pager"
+	"github.com/apache/answer/internal/entity"
+	activityrepo "github.com/apache/answer/internal/repo/activity"
+	answerrepo "github.com/apache/answer/internal/repo/answer"
+	collectionrepo "github.com/apache/answer/internal/repo/collection"
+	commentrepo "github.com/apache/answer/internal/repo/comment"
+	commentservice "github.com/apache/answer/internal/service/comment"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPersonalRepositoriesExcludeDeletedContentBeforePagination(t *testing.T) {
+	ctx := context.Background()
+	const (
+		questionID   = "990000001"
+		answerID     = "990000002"
+		commentID    = "990000003"
+		collectionID = "990000004"
+		activityID   = "990000005"
+		userID       = "990000006"
+		activityType = 990001
+	)
+
+	question := &entity.Question{
+		ID:     questionID,
+		UserID: userID,
+		Title:  "visible question",
+		Status: entity.QuestionStatusAvailable,
+	}
+	answer := &entity.Answer{
+		ID:           answerID,
+		QuestionID:   questionID,
+		UserID:       userID,
+		OriginalText: "visible answer",
+		ParsedText:   "visible answer",
+		Status:       entity.AnswerStatusAvailable,
+	}
+	comment := &entity.Comment{
+		ID:           commentID,
+		ObjectID:     answerID,
+		QuestionID:   questionID,
+		UserID:       userID,
+		OriginalText: "visible comment",
+		ParsedText:   "visible comment",
+		Status:       entity.CommentStatusAvailable,
+	}
+	collection := &entity.Collection{ID: collectionID, ObjectID: questionID, UserID: userID}
+	activity := &entity.Activity{
+		ID:           activityID,
+		ObjectID:     answerID,
+		UserID:       userID,
+		ActivityType: activityType,
+	}
+
+	_, err := testDataSource.DB.Insert(question, answer, comment, collection, activity)
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		_, _ = testDataSource.DB.ID(activityID).Delete(&entity.Activity{})
+		_, _ = testDataSource.DB.ID(collectionID).Delete(&entity.Collection{})
+		_, _ = testDataSource.DB.ID(commentID).Delete(&entity.Comment{})
+		_, _ = testDataSource.DB.ID(answerID).Delete(&entity.Answer{})
+		_, _ = testDataSource.DB.ID(questionID).Delete(&entity.Question{})
+	})
+
+	answerRepo := answerrepo.NewAnswerRepo(testDataSource, nil, nil, nil)
+	collectionRepo := collectionrepo.NewCollectionRepo(testDataSource, nil)
+	commentRepo := commentrepo.NewCommentRepo(testDataSource, nil)
+	voteRepo := activityrepo.NewVoteRepo(testDataSource, nil, nil, nil)
+
+	personalCounts := func() (answers, collections, comments, votes int64) {
+		_, answers, err = answerRepo.GetPersonalAnswerPage(ctx, &entity.PersonalAnswerPageQueryCond{
+			Page: 1, PageSize: 10, UserID: userID,
+		})
+		require.NoError(t, err)
+
+		_, collections, err = collectionRepo.SearchList(ctx, &entity.CollectionSearch{
+			Collection: entity.Collection{UserID: userID}, Page: 1, PageSize: 10,
+		})
+		require.NoError(t, err)
+
+		_, comments, err = commentRepo.GetCommentPage(ctx, &commentservice.CommentQuery{
+			PageCond: pager.PageCond{Page: 1, PageSize: 10}, UserID: userID, ExcludeDeletedContent: true,
+		})
+		require.NoError(t, err)
+
+		_, votes, err = voteRepo.ListUserVotes(ctx, userID, 1, 10, []int{activityType})
+		require.NoError(t, err)
+		return
+	}
+
+	answers, collections, comments, votes := personalCounts()
+	assert.Equal(t, int64(1), answers)
+	assert.Equal(t, int64(1), collections)
+	assert.Equal(t, int64(1), comments)
+	assert.Equal(t, int64(1), votes)
+
+	_, err = testDataSource.DB.ID(answerID).Cols("status").Update(&entity.Answer{Status: entity.AnswerStatusDeleted})
+	require.NoError(t, err)
+	answers, collections, comments, votes = personalCounts()
+	assert.Equal(t, int64(0), answers)
+	assert.Equal(t, int64(1), collections)
+	assert.Equal(t, int64(0), comments)
+	assert.Equal(t, int64(0), votes)
+
+	_, err = testDataSource.DB.ID(answerID).Cols("status").Update(&entity.Answer{Status: entity.AnswerStatusAvailable})
+	require.NoError(t, err)
+	_, err = testDataSource.DB.ID(questionID).Cols("status").Update(&entity.Question{Status: entity.QuestionStatusDeleted})
+	require.NoError(t, err)
+	answers, collections, comments, votes = personalCounts()
+	assert.Equal(t, int64(0), answers)
+	assert.Equal(t, int64(0), collections)
+	assert.Equal(t, int64(0), comments)
+	assert.Equal(t, int64(0), votes)
+}
diff --git a/internal/repo/user/user_repo.go b/internal/repo/user/user_repo.go
index 1533cc5e8..6b6f11201 100644
--- a/internal/repo/user/user_repo.go
+++ b/internal/repo/user/user_repo.go
@@ -239,7 +239,7 @@ func (ur *userRepo) GetByUsernames(ctx context.Context, usernames []string) ([]*
 // GetByEmail get user by email
 func (ur *userRepo) GetByEmail(ctx context.Context, email string) (userInfo *entity.User, exist bool, err error) {
 	userInfo = &entity.User{}
-	exist, err = ur.data.DB.Context(ctx).Where("e_mail = ?", email).
+	exist, err = ur.data.DB.Context(ctx).Where("LOWER(e_mail) = ?", strings.ToLower(strings.TrimSpace(email))).
 		Where("status != ?", entity.UserStatusDeleted).Get(userInfo)
 	if err != nil {
 		err = errors.InternalServer(reason.DatabaseError).WithError(err).WithStack()
diff --git a/internal/router/answer_api_router.go b/internal/router/answer_api_router.go
index 84b8b4e1c..ccf1bba41 100644
--- a/internal/router/answer_api_router.go
+++ b/internal/router/answer_api_router.go
@@ -62,6 +62,7 @@ type AnswerAPIRouter struct {
 	aiConversationController      *controller.AIConversationController
 	aiConversationAdminController *controller_admin.AIConversationAdminController
 	mcpController                 *controller.MCPController
+	forumSectionController        *controller.ForumSectionController
 }
 
 func NewAnswerAPIRouter(
@@ -100,6 +101,7 @@ func NewAnswerAPIRouter(
 	aiConversationController *controller.AIConversationController,
 	aiConversationAdminController *controller_admin.AIConversationAdminController,
 	mcpController *controller.MCPController,
+	forumSectionController *controller.ForumSectionController,
 ) *AnswerAPIRouter {
 	return &AnswerAPIRouter{
 		langController:                langController,
@@ -137,6 +139,7 @@ func NewAnswerAPIRouter(
 		aiConversationController:      aiConversationController,
 		aiConversationAdminController: aiConversationAdminController,
 		mcpController:                 mcpController,
+		forumSectionController:        forumSectionController,
 	}
 }
 
@@ -155,6 +158,7 @@ func (a *AnswerAPIRouter) RegisterMustUnAuthAnswerAPIRouter(authUserMiddleware *
 	routerGroup := r.Group("", middleware.BanAPIForUserCenter)
 	routerGroup.POST("/user/login/email", a.userController.UserEmailLogin)
 	routerGroup.POST("/user/register/email", a.userController.UserRegisterByEmail)
+	routerGroup.POST("/user/register/email/code", a.userController.UserRegisterEmailCodeSend)
 	routerGroup.POST("/user/email/verification", a.userController.UserVerifyEmail)
 	routerGroup.PUT("/user/email", a.userController.UserChangeEmailVerify)
 	routerGroup.POST("/user/password/reset", a.userController.RetrievePassWord)
@@ -166,6 +170,9 @@ func (a *AnswerAPIRouter) RegisterMustUnAuthAnswerAPIRouter(authUserMiddleware *
 }
 
 func (a *AnswerAPIRouter) RegisterUnAuthAnswerAPIRouter(r *gin.RouterGroup) {
+	// campus forum sections
+	r.GET("/forum/sections", a.forumSectionController.List)
+
 	// user
 	r.GET("/personal/user/info", a.userController.GetOtherUserInfoByUsername)
 	r.GET("/user/ranking", a.userController.UserRanking)
@@ -174,7 +181,11 @@ func (a *AnswerAPIRouter) RegisterUnAuthAnswerAPIRouter(r *gin.RouterGroup) {
 	// answer
 	r.GET("/answer/info", a.answerController.GetAnswerInfo)
 	r.GET("/answer/page", a.answerController.AnswerList)
+	// Forum-oriented aliases: answers are top-level comments on posts.
+	r.GET("/post/comment/info", a.answerController.GetAnswerInfo)
+	r.GET("/post/comment/page", a.answerController.AnswerList)
 	r.GET("/personal/answer/page", a.questionController.PersonalAnswerPage)
+	r.GET("/personal/post/comment/page", a.questionController.PersonalAnswerPage)
 
 	// question
 	r.GET("/question/info", a.questionController.GetQuestion)
@@ -182,13 +193,19 @@ func (a *AnswerAPIRouter) RegisterUnAuthAnswerAPIRouter(r *gin.RouterGroup) {
 	r.GET("/question/page", a.questionController.QuestionPage)
 	r.GET("/question/recommend/page", a.questionController.QuestionRecommendPage)
 	r.GET("/question/similar/tag", a.questionController.SimilarQuestion)
+	// Forum-oriented alias: related posts currently use the first tag.
+	r.GET("/post/related", a.questionController.SimilarQuestion)
 	r.GET("/personal/qa/top", a.questionController.UserTop)
 	r.GET("/personal/question/page", a.questionController.PersonalQuestionPage)
+	r.GET("/personal/content/top", a.questionController.UserContentTop)
+	r.GET("/personal/post/page", a.questionController.PersonalQuestionPage)
 	r.GET("/question/link", a.questionController.GetQuestionLink)
 
 	// comment
 	r.GET("/comment/page", a.commentController.GetCommentWithPage)
 	r.GET("/personal/comment/page", a.commentController.GetCommentPersonalWithPage)
+	// Forum-oriented alias: low-level comments are replies.
+	r.GET("/personal/reply/page", a.commentController.GetCommentPersonalWithPage)
 	r.GET("/comment", a.commentController.GetComment)
 
 	// tag
@@ -207,13 +224,6 @@ func (a *AnswerAPIRouter) RegisterUnAuthAnswerAPIRouter(r *gin.RouterGroup) {
 
 	// reaction
 	r.GET("/meta/reaction", a.metaController.GetReaction)
-
-	// badges
-	r.GET("/badge", a.badgeController.GetBadgeInfo)
-	r.GET("/badge/awards/page", a.badgeController.GetBadgeAwardList)
-	r.GET("/badge/user/awards/recent", a.badgeController.GetRecentBadgeAwardListByUsername)
-	r.GET("/badge/user/awards", a.badgeController.GetAllBadgeAwardListByUsername)
-	r.GET("/badges", a.badgeController.GetBadgeList)
 }
 
 func (a *AnswerAPIRouter) RegisterAuthUserWithAnyStatusAnswerAPIRouter(r *gin.RouterGroup) {
@@ -283,6 +293,11 @@ func (a *AnswerAPIRouter) RegisterAnswerAPIRouter(r *gin.RouterGroup) {
 	r.POST("/answer/acceptance", a.answerController.AcceptAnswer)
 	r.DELETE("/answer", a.answerController.RemoveAnswer)
 	r.POST("/answer/recover", a.answerController.RecoverAnswer)
+	// Forum-oriented aliases for top-level post comments.
+	r.POST("/post/comment", a.answerController.AddAnswer)
+	r.PUT("/post/comment", a.answerController.UpdateAnswer)
+	r.DELETE("/post/comment", a.answerController.RemoveAnswer)
+	r.POST("/post/comment/recover", a.answerController.RecoverAnswer)
 
 	// user
 	r.PUT("/user/password", middleware.BanAPIForUserCenter, a.userController.UserModifyPassWord)
@@ -412,10 +427,6 @@ func (a *AnswerAPIRouter) RegisterAnswerAdminAPIRouter(r *gin.RouterGroup) {
 	r.GET("/plugin/config", a.pluginController.GetPluginConfig)
 	r.PUT("/plugin/config", a.pluginController.UpdatePluginConfig)
 
-	// badge
-	r.GET("/badges", a.adminBadgeController.GetBadgeList)
-	r.PUT("/badge/status", a.adminBadgeController.UpdateBadgeStatus)
-
 	// api key
 	r.GET("/api-key/all", a.apiKeyController.GetAllAPIKeys)
 	r.POST("/api-key", a.apiKeyController.AddAPIKey)
diff --git a/internal/schema/email_template.go b/internal/schema/email_template.go
index d7e4b929a..0113ce046 100644
--- a/internal/schema/email_template.go
+++ b/internal/schema/email_template.go
@@ -61,6 +61,12 @@ type RegisterTemplateData struct {
 	RegisterUrl string
 }
 
+type RegisterCodeTemplateData struct {
+	SiteName       string
+	Code           string
+	ExpiresMinutes int
+}
+
 type PassResetTemplateData struct {
 	SiteName     string
 	PassResetUrl string
diff --git a/internal/schema/forum_section_schema.go b/internal/schema/forum_section_schema.go
new file mode 100644
index 000000000..6d506e18e
--- /dev/null
+++ b/internal/schema/forum_section_schema.go
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package schema
+
+type ForumSectionResp struct {
+	ID        int64               `json:"id"`
+	ParentID  int64               `json:"parent_id"`
+	Slug      string              `json:"slug"`
+	Name      string              `json:"name"`
+	AdminOnly bool                `json:"admin_only"`
+	Children  []*ForumSectionResp `json:"children"`
+}
diff --git a/internal/schema/permission.go b/internal/schema/permission.go
index 106709d12..3c2ce5956 100644
--- a/internal/schema/permission.go
+++ b/internal/schema/permission.go
@@ -64,10 +64,5 @@ func (r *GetPermissionResp) TrTip(lang i18n.Language, requireRank int) {
 	if r.HasPermission {
 		return
 	}
-	if requireRank <= 0 {
-		r.NoPermissionTip = translator.Tr(lang, reason.RankFailToMeetTheCondition)
-	} else {
-		r.NoPermissionTip = translator.TrWithData(
-			lang, reason.NoEnoughRankToOperate, &PermissionTrTplData{Rank: requireRank})
-	}
+	r.NoPermissionTip = translator.Tr(lang, reason.ForbiddenError)
 }
diff --git a/internal/schema/question_schema.go b/internal/schema/question_schema.go
index 4c2313852..fd4a01a8f 100644
--- a/internal/schema/question_schema.go
+++ b/internal/schema/question_schema.go
@@ -84,6 +84,8 @@ type QuestionAdd struct {
 	HTML string `json:"-"`
 	// tags
 	Tags []*TagItem `validate:"dive" json:"tags"`
+	// campus forum section (leaf section only)
+	SectionID int64 `validate:"required,min=1" json:"section_id"`
 	// user id
 	UserID string `json:"-"`
 	QuestionPermission
@@ -113,7 +115,8 @@ type QuestionAddByAnswer struct {
 	AnswerContent string `validate:"required,notblank,gte=6,lte=65535" json:"answer_content"`
 	AnswerHTML    string `json:"-"`
 	// tags
-	Tags []*TagItem `validate:"dive" json:"tags"`
+	Tags      []*TagItem `validate:"dive" json:"tags"`
+	SectionID int64      `validate:"required,min=1" json:"section_id"`
 	// user id
 	UserID              string   `json:"-"`
 	MentionUsernameList []string `validate:"omitempty" json:"mention_username_list"`
@@ -144,6 +147,7 @@ func (req *QuestionAddByAnswer) Check() (errFields []*validator.FormErrorField,
 
 type QuestionPermission struct {
 	IsAdminModerator bool `json:"-"`
+	IsAdmin          bool `json:"-"`
 	// whether user can add it
 	CanAdd bool `json:"-"`
 	// whether user can edit it
@@ -237,6 +241,7 @@ type QuestionInfoResp struct {
 	HTML                 string         `json:"html"`
 	Description          string         `json:"description"`
 	Tags                 []*TagResp     `json:"tags"`
+	SectionID            int64          `json:"section_id"`
 	ViewCount            int            `json:"view_count"`
 	UniqueViewCount      int            `json:"unique_view_count"`
 	VoteCount            int            `json:"vote_count"`
@@ -372,6 +377,7 @@ type QuestionPageReq struct {
 	Tag       string `validate:"omitempty,gt=0,lte=100" form:"tag"`
 	Username  string `validate:"omitempty,gt=0,lte=100" form:"username"`
 	InDays    int    `validate:"omitempty,min=1" form:"in_days"`
+	Section   string `validate:"omitempty,lte=50" form:"section"`
 
 	LoginUserID      string `json:"-"`
 	UserIDBeSearched string `json:"-"`
@@ -395,6 +401,7 @@ type QuestionPageResp struct {
 	Show        int        `json:"show"` // 0: show, 1: hide
 	Status      int        `json:"status"`
 	Tags        []*TagResp `json:"tags"`
+	SectionID   int64      `json:"section_id"`
 
 	// question statistical information
 	ViewCount       int `json:"view_count"`
diff --git a/internal/schema/simple_obj_info_schema.go b/internal/schema/simple_obj_info_schema.go
index eebdd8980..64e11d0d6 100644
--- a/internal/schema/simple_obj_info_schema.go
+++ b/internal/schema/simple_obj_info_schema.go
@@ -60,6 +60,16 @@ func (s *SimpleObjectInfo) IsDeleted() bool {
 	return false
 }
 
+// IsDeletedOrParentDeleted reports whether an object, or the question that
+// contains it, has been deleted. Personal activity pages must not expose links
+// to either kind of deleted content.
+func (s *SimpleObjectInfo) IsDeletedOrParentDeleted() bool {
+	if s == nil {
+		return true
+	}
+	return s.IsDeleted() || s.QuestionStatus == entity.QuestionStatusDeleted
+}
+
 func (s *SimpleObjectInfo) CheckVisibility(userID string, isAdminModerator bool) error {
 	if s == nil {
 		return errors.NotFound(reason.ObjectNotFound)
diff --git a/internal/schema/simple_obj_info_schema_test.go b/internal/schema/simple_obj_info_schema_test.go
new file mode 100644
index 000000000..d1dfbb680
--- /dev/null
+++ b/internal/schema/simple_obj_info_schema_test.go
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package schema
+
+import (
+	"testing"
+
+	"github.com/apache/answer/internal/base/constant"
+	"github.com/apache/answer/internal/entity"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSimpleObjectInfo_IsDeletedOrParentDeleted(t *testing.T) {
+	tests := []struct {
+		name string
+		info *SimpleObjectInfo
+		want bool
+	}{
+		{name: "missing object", info: nil, want: true},
+		{
+			name: "available question",
+			info: &SimpleObjectInfo{ObjectType: constant.QuestionObjectType, QuestionStatus: entity.QuestionStatusAvailable},
+			want: false,
+		},
+		{
+			name: "deleted question",
+			info: &SimpleObjectInfo{ObjectType: constant.QuestionObjectType, QuestionStatus: entity.QuestionStatusDeleted},
+			want: true,
+		},
+		{
+			name: "available answer on available question",
+			info: &SimpleObjectInfo{
+				ObjectType:     constant.AnswerObjectType,
+				AnswerStatus:   entity.AnswerStatusAvailable,
+				QuestionStatus: entity.QuestionStatusAvailable,
+			},
+			want: false,
+		},
+		{
+			name: "deleted answer",
+			info: &SimpleObjectInfo{
+				ObjectType:     constant.AnswerObjectType,
+				AnswerStatus:   entity.AnswerStatusDeleted,
+				QuestionStatus: entity.QuestionStatusAvailable,
+			},
+			want: true,
+		},
+		{
+			name: "answer on deleted question",
+			info: &SimpleObjectInfo{
+				ObjectType:     constant.AnswerObjectType,
+				AnswerStatus:   entity.AnswerStatusAvailable,
+				QuestionStatus: entity.QuestionStatusDeleted,
+			},
+			want: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, tt.info.IsDeletedOrParentDeleted())
+		})
+	}
+}
+
+func TestUserResponsesExposeForumCountAliases(t *testing.T) {
+	userInfo := &entity.User{
+		AnswerCount:   7,
+		QuestionCount: 3,
+	}
+
+	loginResp := &UserLoginResp{}
+	loginResp.ConvertFromUserEntity(userInfo)
+	assert.Equal(t, 7, loginResp.CommentCount)
+	assert.Equal(t, 3, loginResp.PostCount)
+
+	currentResp := &GetCurrentLoginUserInfoResp{}
+	currentResp.ConvertFromUserEntity(userInfo)
+	assert.Equal(t, 7, currentResp.CommentCount)
+	assert.Equal(t, 3, currentResp.PostCount)
+
+	otherResp := &GetOtherUserInfoByUsernameResp{}
+	otherResp.ConvertFromUserEntity(userInfo)
+	assert.Equal(t, 7, otherResp.CommentCount)
+	assert.Equal(t, 3, otherResp.PostCount)
+}
diff --git a/internal/schema/user_schema.go b/internal/schema/user_schema.go
index 0683a5aff..4afaceb45 100644
--- a/internal/schema/user_schema.go
+++ b/internal/schema/user_schema.go
@@ -67,6 +67,10 @@ type UserLoginResp struct {
 	AnswerCount int `json:"answer_count"`
 	// question count
 	QuestionCount int `json:"question_count"`
+	// forum comment count (compatibility alias of answer_count)
+	CommentCount int `json:"comment_count"`
+	// forum post count (compatibility alias of question_count)
+	PostCount int `json:"post_count"`
 	// rank
 	Rank int `json:"rank"`
 	// authority group
@@ -105,6 +109,8 @@ type UserLoginResp struct {
 
 func (r *UserLoginResp) ConvertFromUserEntity(userInfo *entity.User) {
 	_ = copier.Copy(r, userInfo)
+	r.CommentCount = userInfo.AnswerCount
+	r.PostCount = userInfo.QuestionCount
 	r.CreatedAt = userInfo.CreatedAt.Unix()
 	r.LastLoginDate = userInfo.LastLoginDate.Unix()
 	r.Status = constant.ConvertUserStatus(userInfo.Status, userInfo.MailStatus)
@@ -121,6 +127,8 @@ type GetCurrentLoginUserInfoResp struct {
 
 func (r *GetCurrentLoginUserInfoResp) ConvertFromUserEntity(userInfo *entity.User) {
 	_ = copier.Copy(r, userInfo)
+	r.CommentCount = userInfo.AnswerCount
+	r.PostCount = userInfo.QuestionCount
 	r.CreatedAt = userInfo.CreatedAt.Unix()
 	r.LastLoginDate = userInfo.LastLoginDate.Unix()
 	r.Status = constant.ConvertUserStatus(userInfo.Status, userInfo.MailStatus)
@@ -149,6 +157,10 @@ type GetOtherUserInfoByUsernameResp struct {
 	AnswerCount int `json:"answer_count"`
 	// question count
 	QuestionCount int `json:"question_count"`
+	// forum comment count (compatibility alias of answer_count)
+	CommentCount int `json:"comment_count"`
+	// forum post count (compatibility alias of question_count)
+	PostCount int `json:"post_count"`
 	// rank
 	Rank int `json:"rank"`
 	// display name
@@ -173,6 +185,8 @@ type GetOtherUserInfoByUsernameResp struct {
 
 func (r *GetOtherUserInfoByUsernameResp) ConvertFromUserEntity(userInfo *entity.User) {
 	_ = copier.Copy(r, userInfo)
+	r.CommentCount = userInfo.AnswerCount
+	r.PostCount = userInfo.QuestionCount
 	r.CreatedAt = userInfo.CreatedAt.Unix()
 	r.LastLoginDate = userInfo.LastLoginDate.Unix()
 	r.Status = constant.ConvertUserStatus(userInfo.Status, userInfo.MailStatus)
@@ -219,13 +233,12 @@ type UserEmailLoginReq struct {
 
 // UserRegisterReq user register request
 type UserRegisterReq struct {
-	Name                     string `validate:"required,gte=2,lte=30" json:"name"`
-	Email                    string `validate:"required,email,gt=0,lte=500" json:"e_mail" `
-	Pass                     string `validate:"required,gte=8,lte=32" json:"pass"`
-	CaptchaID                string `json:"captcha_id"`
-	CaptchaCode              string `json:"captcha_code"`
-	IP                       string `json:"-" `
-	RequireEmailVerification bool   `json:"-"`
+	Name        string `validate:"required,gte=2,lte=30" json:"name"`
+	Email       string `validate:"required,email,gt=0,lte=500" json:"e_mail"`
+	Pass        string `validate:"required,gte=8,lte=32" json:"pass"`
+	PassConfirm string `validate:"required,gte=8,lte=32" json:"pass_confirm"`
+	EmailCode   string `validate:"required,len=6,numeric" json:"email_code"`
+	IP          string `json:"-"`
 }
 
 func (u *UserRegisterReq) Check() (errFields []*validator.FormErrorField, err error) {
@@ -236,9 +249,27 @@ func (u *UserRegisterReq) Check() (errFields []*validator.FormErrorField, err er
 		})
 		return errFields, err
 	}
+	if u.Pass != u.PassConfirm {
+		errFields = append(errFields, &validator.FormErrorField{
+			ErrorField: "pass_confirm",
+			ErrorMsg:   reason.PasswordConfirmationMismatch,
+		})
+		return errFields, errors.BadRequest(reason.PasswordConfirmationMismatch)
+	}
 	return nil, nil
 }
 
+type UserRegisterEmailCodeReq struct {
+	Email       string `validate:"required,email,gt=0,lte=500" json:"e_mail"`
+	CaptchaID   string `json:"captcha_id"`
+	CaptchaCode string `json:"captcha_code"`
+	IP          string `json:"-"`
+}
+
+type RetryAfterResp struct {
+	RetryAfter int64 `json:"retry_after"`
+}
+
 type UserModifyPasswordReq struct {
 	OldPass     string `validate:"omitempty,gte=8,lte=32" json:"old_pass"`
 	Pass        string `validate:"required,gte=8,lte=32" json:"pass"`
diff --git a/internal/service/badge/badge_event_handler.go b/internal/service/badge/badge_event_handler.go
index 0a9a84c0f..c531a5e07 100644
--- a/internal/service/badge/badge_event_handler.go
+++ b/internal/service/badge/badge_event_handler.go
@@ -57,7 +57,6 @@ func NewBadgeEventService(
 		eventRuleRepo:     eventRuleRepo,
 		badgeAwardService: badgeAwardService,
 	}
-	eventQueueService.RegisterHandler(n.Handler)
 	return n
 }
 
diff --git a/internal/service/comment/comment_service.go b/internal/service/comment/comment_service.go
index 0decd5847..51b499c6c 100644
--- a/internal/service/comment/comment_service.go
+++ b/internal/service/comment/comment_service.go
@@ -68,6 +68,8 @@ type CommentQuery struct {
 	QueryCond string
 	// user id
 	UserID string
+	// exclude comments whose object or parent question has been deleted
+	ExcludeDeletedContent bool
 }
 
 func (c *CommentQuery) GetOrderBy() string {
@@ -529,9 +531,10 @@ func (cs *CommentService) GetCommentPersonalWithPage(ctx context.Context, req *s
 	}
 
 	dto := &CommentQuery{
-		PageCond:  pager.PageCond{Page: req.Page, PageSize: req.PageSize},
-		UserID:    req.UserID,
-		QueryCond: "created_at",
+		PageCond:              pager.PageCond{Page: req.Page, PageSize: req.PageSize},
+		UserID:                req.UserID,
+		QueryCond:             "created_at",
+		ExcludeDeletedContent: true,
 	}
 	commentList, total, err := cs.commentRepo.GetCommentPage(ctx, dto)
 	if err != nil {
@@ -549,16 +552,16 @@ func (cs *CommentService) GetCommentPersonalWithPage(ctx context.Context, req *s
 			objInfo, err := cs.objectInfoService.GetInfo(ctx, comment.ObjectID)
 			if err != nil {
 				log.Error(err)
-			} else {
-				commentResp.ObjectType = objInfo.ObjectType
-				commentResp.Title = objInfo.Title
-				commentResp.UrlTitle = htmltext.UrlTitle(objInfo.Title)
-				commentResp.QuestionID = objInfo.QuestionID
-				commentResp.AnswerID = objInfo.AnswerID
-				if objInfo.QuestionStatus == entity.QuestionStatusDeleted {
-					commentResp.Title = "Deleted question"
-				}
+				continue
+			}
+			if objInfo.IsDeletedOrParentDeleted() {
+				continue
 			}
+			commentResp.ObjectType = objInfo.ObjectType
+			commentResp.Title = objInfo.Title
+			commentResp.UrlTitle = htmltext.UrlTitle(objInfo.Title)
+			commentResp.QuestionID = objInfo.QuestionID
+			commentResp.AnswerID = objInfo.AnswerID
 		}
 		resp = append(resp, commentResp)
 	}
diff --git a/internal/service/content/question_hottest_service.go b/internal/service/content/question_hottest_service.go
index b73e7a30d..5b6bc20fc 100644
--- a/internal/service/content/question_hottest_service.go
+++ b/internal/service/content/question_hottest_service.go
@@ -40,6 +40,7 @@ func (q *QuestionService) RefreshHottestCron(ctx context.Context) {
 			ctx,
 			page, pageSize,
 			[]string{},
+			[]int64{},
 			"", "newest",
 			schema.HotInDays,
 			false, false)
diff --git a/internal/service/content/question_service.go b/internal/service/content/question_service.go
index 73f66a4c1..24a6eaf07 100644
--- a/internal/service/content/question_service.go
+++ b/internal/service/content/question_service.go
@@ -44,6 +44,7 @@ import (
 	collectioncommon "github.com/apache/answer/internal/service/collection_common"
 	"github.com/apache/answer/internal/service/config"
 	"github.com/apache/answer/internal/service/export"
+	forumsectionservice "github.com/apache/answer/internal/service/forum_section"
 	metacommon "github.com/apache/answer/internal/service/meta_common"
 	"github.com/apache/answer/internal/service/noticequeue"
 	"github.com/apache/answer/internal/service/notification"
@@ -95,6 +96,7 @@ type QuestionService struct {
 	eventQueueService                eventqueue.Service
 	reviewRepo                       review.ReviewRepo
 	vectorSyncService                vector_sync.Service
+	forumSectionService              *forumsectionservice.Service
 }
 
 func NewQuestionService(
@@ -122,6 +124,7 @@ func NewQuestionService(
 	eventQueueService eventqueue.Service,
 	reviewRepo review.ReviewRepo,
 	vectorSyncService vector_sync.Service,
+	forumSectionService *forumsectionservice.Service,
 ) *QuestionService {
 	return &QuestionService{
 		activityRepo:                     activityRepo,
@@ -148,6 +151,7 @@ func NewQuestionService(
 		eventQueueService:                eventQueueService,
 		reviewRepo:                       reviewRepo,
 		vectorSyncService:                vectorSyncService,
+		forumSectionService:              forumSectionService,
 	}
 }
 
@@ -237,7 +241,7 @@ func (qs *QuestionService) CheckAddQuestion(ctx context.Context, req *schema.Que
 	if err != nil {
 		return
 	}
-	if len(req.Tags) < minimumTags {
+	if len(req.Tags) > 0 && len(req.Tags) < minimumTags {
 		errorlist := make([]*validator.FormErrorField, 0)
 		errorlist = append(errorlist, &validator.FormErrorField{
 			ErrorField: "tags",
@@ -305,11 +309,15 @@ func (qs *QuestionService) HasNewTag(ctx context.Context, tags []*schema.TagItem
 
 // AddQuestion add question
 func (qs *QuestionService) AddQuestion(ctx context.Context, req *schema.QuestionAdd) (questionInfo any, err error) {
+	_, err = qs.forumSectionService.ValidatePostingSection(ctx, req.SectionID, req.IsAdmin)
+	if err != nil {
+		return nil, err
+	}
 	minimumTags, err := qs.tagCommon.GetMinimumTags(ctx)
 	if err != nil {
 		return
 	}
-	if len(req.Tags) < minimumTags {
+	if len(req.Tags) > 0 && len(req.Tags) < minimumTags {
 		errorlist := make([]*validator.FormErrorField, 0)
 		errorlist = append(errorlist, &validator.FormErrorField{
 			ErrorField: "tags",
@@ -372,6 +380,7 @@ func (qs *QuestionService) AddQuestion(ctx context.Context, req *schema.Question
 	question := &entity.Question{}
 	now := time.Now()
 	question.UserID = req.UserID
+	question.SectionID = req.SectionID
 	question.Title = req.Title
 	question.OriginalText = req.Content
 	question.ParsedText = req.HTML
@@ -1244,19 +1253,15 @@ func (qs *QuestionService) PersonalAnswerPage(ctx context.Context, req *schema.P
 	}
 
 	for _, item := range answerlist {
-		_, ok := questionMaps[item.QuestionID]
-		if ok {
-			item.QuestionInfo = questionMaps[item.QuestionID]
-		} else {
+		questionInfo, ok := questionMaps[item.QuestionID]
+		if !ok || questionInfo.Status == entity.QuestionStatusDeleted {
 			continue
 		}
+		item.QuestionInfo = questionInfo
 		info := &schema.UserAnswerInfo{}
 		_ = copier.Copy(info, item)
 		info.AnswerID = item.ID
 		info.QuestionID = item.QuestionID
-		if item.QuestionInfo.Status == entity.QuestionStatusDeleted {
-			info.QuestionInfo.Title = "Deleted question"
-		}
 		userAnswerlist = append(userAnswerlist, info)
 	}
 
@@ -1288,16 +1293,13 @@ func (qs *QuestionService) PersonalCollectionPage(ctx context.Context, req *sche
 		if handler.GetEnableShortID(ctx) {
 			id = uid.EnShortID(id)
 		}
-		_, ok := questionMaps[id]
-		if ok {
-			questionMaps[id].LastAnsweredUserInfo = nil
-			questionMaps[id].UpdateUserInfo = nil
-			questionMaps[id].Content = ""
-			questionMaps[id].HTML = ""
-			if questionMaps[id].Status == entity.QuestionStatusDeleted {
-				questionMaps[id].Title = "Deleted question"
-			}
-			list = append(list, questionMaps[id])
+		questionInfo, ok := questionMaps[id]
+		if ok && questionInfo.Status != entity.QuestionStatusDeleted {
+			questionInfo.LastAnsweredUserInfo = nil
+			questionInfo.UpdateUserInfo = nil
+			questionInfo.Content = ""
+			questionInfo.HTML = ""
+			list = append(list, questionInfo)
 		}
 	}
 
@@ -1327,12 +1329,14 @@ func (qs *QuestionService) SearchUserTopList(ctx context.Context, userName strin
 	if err != nil {
 		return userQuestionlist, userAnswerlist, err
 	}
-	answersearch := &entity.AnswerSearch{}
-	answersearch.UserID = userinfo.ID
-	answersearch.PageSize = 5
-	answersearch.Order = entity.AnswerSearchOrderByVote
+	answersearch := &entity.PersonalAnswerPageQueryCond{
+		Page:     1,
+		PageSize: 5,
+		UserID:   userinfo.ID,
+		Order:    entity.AnswerSearchOrderByVote,
+	}
 	questionIDs := make([]string, 0)
-	answerList, _, err := qs.questioncommon.AnswerCommon.Search(ctx, answersearch)
+	answerList, _, err := qs.questioncommon.AnswerCommon.PersonalAnswerPage(ctx, answersearch)
 	if err != nil {
 		return userQuestionlist, userAnswerlist, err
 	}
@@ -1346,9 +1350,9 @@ func (qs *QuestionService) SearchUserTopList(ctx context.Context, userName strin
 		return userQuestionlist, userAnswerlist, err
 	}
 	for _, item := range answerlist {
-		_, ok := questionMaps[item.QuestionID]
-		if ok {
-			item.QuestionInfo = questionMaps[item.QuestionID]
+		questionInfo, ok := questionMaps[item.QuestionID]
+		if ok && questionInfo.Status != entity.QuestionStatusDeleted {
+			item.QuestionInfo = questionInfo
 		}
 	}
 
@@ -1360,6 +1364,9 @@ func (qs *QuestionService) SearchUserTopList(ctx context.Context, userName strin
 	}
 
 	for _, item := range answerlist {
+		if item.QuestionInfo == nil || item.QuestionInfo.Status == entity.QuestionStatusDeleted {
+			continue
+		}
 		info := &schema.UserAnswerInfo{}
 		_ = copier.Copy(info, item)
 		info.AnswerID = item.ID
@@ -1484,6 +1491,17 @@ func (qs *QuestionService) GetQuestionPage(ctx context.Context, req *schema.Ques
 	}
 	// query by tag condition
 	var tagIDs = make([]string, 0)
+	var sectionIDs = make([]int64, 0)
+	if req.Section != "" {
+		var exists bool
+		sectionIDs, exists, err = qs.forumSectionService.ResolveSectionIDs(ctx, req.Section)
+		if err != nil {
+			return nil, 0, err
+		}
+		if !exists {
+			return questions, 0, nil
+		}
+	}
 	if len(req.Tag) > 0 {
 		tagInfo, exist, err := qs.tagCommon.GetTagBySlugName(ctx, strings.ToLower(req.Tag))
 		if err != nil {
@@ -1518,7 +1536,7 @@ func (qs *QuestionService) GetQuestionPage(ctx context.Context, req *schema.Ques
 	}
 
 	questionList, total, err := qs.questionRepo.GetQuestionPage(ctx, req.Page, req.PageSize,
-		tagIDs, req.UserIDBeSearched, req.OrderCond, req.InDays, showHidden, req.ShowPending)
+		tagIDs, sectionIDs, req.UserIDBeSearched, req.OrderCond, req.InDays, showHidden, req.ShowPending)
 	if err != nil {
 		return nil, 0, err
 	}
diff --git a/internal/service/content/user_service.go b/internal/service/content/user_service.go
index c1f800ff9..ce7d3c9d8 100644
--- a/internal/service/content/user_service.go
+++ b/internal/service/content/user_service.go
@@ -21,8 +21,11 @@ package content
 
 import (
 	"context"
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
+	"math/big"
+	"strings"
 	"time"
 
 	"github.com/apache/answer/internal/service/eventqueue"
@@ -43,6 +46,7 @@ import (
 	"github.com/apache/answer/internal/service/auth"
 	"github.com/apache/answer/internal/service/export"
 	"github.com/apache/answer/internal/service/file_record"
+	"github.com/apache/answer/internal/service/registration"
 	"github.com/apache/answer/internal/service/role"
 	"github.com/apache/answer/internal/service/siteinfo_common"
 	usercommon "github.com/apache/answer/internal/service/user_common"
@@ -70,6 +74,7 @@ type UserService struct {
 	questionService               *questioncommon.QuestionCommon
 	eventQueueService             eventqueue.Service
 	fileRecordService             *file_record.FileRecordService
+	registrationSecurityRepo      registration.SecurityRepo
 }
 
 func NewUserService(userRepo usercommon.UserRepo,
@@ -86,6 +91,7 @@ func NewUserService(userRepo usercommon.UserRepo,
 	questionService *questioncommon.QuestionCommon,
 	eventQueueService eventqueue.Service,
 	fileRecordService *file_record.FileRecordService,
+	registrationSecurityRepo registration.SecurityRepo,
 ) *UserService {
 	return &UserService{
 		userCommonService:             userCommonService,
@@ -102,6 +108,7 @@ func NewUserService(userRepo usercommon.UserRepo,
 		questionService:               questionService,
 		eventQueueService:             eventQueueService,
 		fileRecordService:             fileRecordService,
+		registrationSecurityRepo:      registrationSecurityRepo,
 	}
 }
 
@@ -150,6 +157,12 @@ func (us *UserService) GetOtherUserInfoByUsername(ctx context.Context, req *sche
 		return nil, err
 	}
 	resp.QuestionCount = int(questionCount)
+	resp.PostCount = resp.QuestionCount
+	commentCount, err := us.questionService.GetPersonalUserCommentCount(ctx, userInfo.ID)
+	if err != nil {
+		return nil, err
+	}
+	resp.CommentCount = int(commentCount)
 	return resp, nil
 }
 
@@ -487,6 +500,7 @@ func (us *UserService) UserUpdateInterface(ctx context.Context, req *schema.Upda
 func (us *UserService) UserRegisterByEmail(ctx context.Context, registerUserInfo *schema.UserRegisterReq) (
 	resp *schema.UserLoginResp, errFields []*validator.FormErrorField, err error,
 ) {
+	registerUserInfo.Email = normalizeRegistrationEmail(registerUserInfo.Email)
 	_, has, err := us.userRepo.GetByEmail(ctx, registerUserInfo.Email)
 	if err != nil {
 		return nil, nil, err
@@ -498,14 +512,9 @@ func (us *UserService) UserRegisterByEmail(ctx context.Context, registerUserInfo
 		})
 		return nil, errFields, errors.BadRequest(reason.EmailDuplicate)
 	}
-
 	userInfo := &entity.User{}
 	userInfo.EMail = registerUserInfo.Email
 	userInfo.DisplayName = registerUserInfo.Name
-	userInfo.Pass, err = us.encryptPassword(ctx, registerUserInfo.Pass)
-	if err != nil {
-		return nil, nil, err
-	}
 	userInfo.Username, err = us.userCommonService.MakeUsername(ctx, registerUserInfo.Name)
 	if err != nil {
 		errFields = append(errFields, &validator.FormErrorField{
@@ -514,31 +523,61 @@ func (us *UserService) UserRegisterByEmail(ctx context.Context, registerUserInfo
 		})
 		return nil, errFields, err
 	}
+	userInfo.Pass, err = us.encryptPassword(ctx, registerUserInfo.Pass)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	verificationToken, validCode, err := us.registrationSecurityRepo.VerifyAndLockEmailCode(
+		ctx,
+		registerUserInfo.Email,
+		registerUserInfo.EmailCode,
+	)
+	if err != nil {
+		return nil, nil, err
+	}
+	if !validCode {
+		errFields = append(errFields, &validator.FormErrorField{
+			ErrorField: "email_code",
+			ErrorMsg:   reason.EmailVerificationCodeInvalid,
+		})
+		return nil, errFields, errors.BadRequest(reason.EmailVerificationCodeInvalid)
+	}
+	defer func() {
+		if releaseErr := us.registrationSecurityRepo.ReleaseEmailCodeLock(
+			ctx,
+			registerUserInfo.Email,
+			verificationToken,
+		); releaseErr != nil {
+			log.Errorf("release registration email code lock failed: %v", releaseErr)
+		}
+	}()
+
 	userInfo.IPInfo = registerUserInfo.IP
-	userInfo.MailStatus = entity.EmailStatusToBeVerified
+	userInfo.MailStatus = entity.EmailStatusAvailable
 	userInfo.Status = entity.UserStatusAvailable
 	userInfo.LastLoginDate = time.Now()
 	err = us.userRepo.AddUser(ctx, userInfo)
 	if err != nil {
 		return nil, nil, err
 	}
+	if _, deleteErr := us.registrationSecurityRepo.DeleteEmailCodeIfMatches(
+		ctx,
+		registerUserInfo.Email,
+		registerUserInfo.EmailCode,
+	); deleteErr != nil {
+		// The account already exists at this point. Keep registration successful;
+		// the duplicate-email check prevents the retained code from being reused.
+		log.Errorf("delete registration email code after user creation failed: %v", deleteErr)
+	}
 	if err := us.userNotificationConfigService.SetDefaultUserNotificationConfig(ctx, []string{userInfo.ID}); err != nil {
 		log.Errorf("set default user notification config failed, err: %v", err)
 	}
 
-	err = applyRegistrationVerification(userInfo, registerUserInfo.RequireEmailVerification, registrationVerificationActions{
-		sendActivationEmail: func() error {
-			return us.sendRegistrationActivationEmail(ctx, userInfo)
-		},
-		activateUser: func() error {
-			return us.userActivity.UserActive(ctx, userInfo.ID)
-		},
-		markEmailAvailable: func() error {
-			return us.userRepo.UpdateEmailStatus(ctx, userInfo.ID, entity.EmailStatusAvailable)
-		},
-	})
-	if err != nil {
-		return nil, nil, err
+	if err = us.userActivity.UserActive(ctx, userInfo.ID); err != nil {
+		// UserActive awards registration activity/rank; the verified account is
+		// already valid and should not become unusable when that auxiliary step fails.
+		log.Errorf("record registration activity for verified user failed: %v", err)
 	}
 
 	roleID, err := us.userRoleService.GetUserRole(ctx, userInfo.ID)
@@ -570,6 +609,75 @@ func (us *UserService) UserRegisterByEmail(ctx context.Context, registerUserInfo
 	return resp, nil, nil
 }
 
+// UserRegisterEmailCodeSend validates the account and sends a one-time email code.
+func (us *UserService) UserRegisterEmailCodeSend(
+	ctx context.Context,
+	req *schema.UserRegisterEmailCodeReq,
+) (retryAfter int64, errFields []*validator.FormErrorField, err error) {
+	req.Email = normalizeRegistrationEmail(req.Email)
+	_, exists, err := us.userRepo.GetByEmail(ctx, req.Email)
+	if err != nil {
+		return 0, nil, err
+	}
+	if exists {
+		errFields = append(errFields, &validator.FormErrorField{
+			ErrorField: "e_mail",
+			ErrorMsg:   reason.EmailDuplicate,
+		})
+		return 0, errFields, errors.BadRequest(reason.EmailDuplicate)
+	}
+
+	retry, err := us.registrationSecurityRepo.CheckAndRecordSendLimit(ctx, req.Email, req.IP)
+	if err != nil {
+		return 0, nil, err
+	}
+	if retry > 0 {
+		seconds := int64((retry + time.Second - 1) / time.Second)
+		return seconds, nil, errors.New(429, reason.EmailSendTooFrequent)
+	}
+
+	code, err := generateRegistrationEmailCode()
+	if err != nil {
+		return 0, nil, errors.InternalServer(reason.UnknownError).WithError(err).WithStack()
+	}
+	if err = us.registrationSecurityRepo.SaveEmailCode(
+		ctx,
+		req.Email,
+		code,
+		registration.EmailCodeTTL,
+	); err != nil {
+		return 0, nil, err
+	}
+
+	title, body, err := us.emailService.RegisterCodeTemplate(
+		ctx,
+		code,
+		int(registration.EmailCodeTTL/time.Minute),
+	)
+	if err == nil {
+		err = us.emailService.SendWithResult(ctx, req.Email, title, body)
+	}
+	if err != nil {
+		if _, deleteErr := us.registrationSecurityRepo.DeleteEmailCodeIfMatches(ctx, req.Email, code); deleteErr != nil {
+			log.Errorf("delete registration code after email failure: %v", deleteErr)
+		}
+		return 0, nil, errors.InternalServer(reason.UnknownError).WithError(err).WithStack()
+	}
+	return 0, nil, nil
+}
+
+func generateRegistrationEmailCode() (string, error) {
+	value, err := rand.Int(rand.Reader, big.NewInt(1000000))
+	if err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("%06d", value.Int64()), nil
+}
+
+func normalizeRegistrationEmail(email string) string {
+	return strings.ToLower(strings.TrimSpace(email))
+}
+
 type registrationVerificationActions struct {
 	sendActivationEmail func() error
 	activateUser        func() error
@@ -596,21 +704,6 @@ func applyRegistrationVerification(
 	return nil
 }
 
-func (us *UserService) sendRegistrationActivationEmail(ctx context.Context, userInfo *entity.User) error {
-	data := &schema.EmailCodeContent{
-		Email:  userInfo.EMail,
-		UserID: userInfo.ID,
-	}
-	code := token.GenerateToken()
-	verifyEmailURL := fmt.Sprintf("%s/users/account-activation?code=%s", us.getSiteUrl(ctx), code)
-	title, body, err := us.emailService.RegisterTemplate(ctx, verifyEmailURL)
-	if err != nil {
-		return err
-	}
-	go us.emailService.SendAndSaveCode(ctx, userInfo.ID, userInfo.EMail, title, body, code, data.ToJSONString())
-	return nil
-}
-
 func (us *UserService) UserVerifyEmailSend(ctx context.Context, userID string) error {
 	userInfo, has, err := us.userRepo.GetByUserID(ctx, userID)
 	if err != nil {
diff --git a/internal/service/content/vote_service.go b/internal/service/content/vote_service.go
index 1f74769f5..ff58abf15 100644
--- a/internal/service/content/vote_service.go
+++ b/internal/service/content/vote_service.go
@@ -219,6 +219,9 @@ func (vs *VoteService) ListUserVotes(ctx context.Context, req schema.GetVoteWith
 			log.Error(err)
 			continue
 		}
+		if objInfo.IsDeletedOrParentDeleted() {
+			continue
+		}
 
 		item := &schema.GetVoteWithPageResp{
 			CreatedAt:  voteInfo.CreatedAt.Unix(),
@@ -232,9 +235,6 @@ func (vs *VoteService) ListUserVotes(ctx context.Context, req schema.GetVoteWith
 		}
 		item.VoteType = translator.Tr(lang,
 			activity_type.ActivityTypeFlagMapping[activityTypeMapping[voteInfo.ActivityType]])
-		if objInfo.QuestionStatus == entity.QuestionStatusDeleted {
-			item.Title = translator.Tr(lang, constant.DeletedQuestionTitleTrKey)
-		}
 		votes = append(votes, item)
 	}
 	return pager.NewPageModel(total, votes), err
diff --git a/internal/service/export/email_service.go b/internal/service/export/email_service.go
index 5b649354c..03e1650f5 100644
--- a/internal/service/export/email_service.go
+++ b/internal/service/export/email_service.go
@@ -121,15 +121,20 @@ func (es *EmailService) SendAndSaveCodeWithTime(
 
 // Send email send
 func (es *EmailService) Send(ctx context.Context, toEmailAddr, subject, body string) {
+	if err := es.SendWithResult(ctx, toEmailAddr, subject, body); err != nil {
+		log.Errorf("send email to %s failed: %s", toEmailAddr, err)
+	}
+}
+
+// SendWithResult sends an email and reports configuration or SMTP failures.
+func (es *EmailService) SendWithResult(ctx context.Context, toEmailAddr, subject, body string) error {
 	log.Infof("try to send email to %s", toEmailAddr)
 	ec, err := es.GetEmailConfig(ctx)
 	if err != nil {
-		log.Errorf("get email config failed: %s", err)
-		return
+		return fmt.Errorf("get email config: %w", err)
 	}
 	if len(ec.SMTPHost) == 0 {
-		log.Warnf("smtp host is empty, skip send email")
-		return
+		return fmt.Errorf("smtp host is empty")
 	}
 
 	m := gomail.NewMessage()
@@ -150,10 +155,10 @@ func (es *EmailService) Send(ctx context.Context, toEmailAddr, subject, body str
 		d.TLSConfig = &tls.Config{ServerName: d.Host, InsecureSkipVerify: true}
 	}
 	if err := d.DialAndSend(m); err != nil {
-		log.Errorf("send email to %s failed: %s", toEmailAddr, err)
-	} else {
-		log.Infof("send email to %s success", toEmailAddr)
+		return fmt.Errorf("send email to %s: %w", toEmailAddr, err)
 	}
+	log.Infof("send email to %s success", toEmailAddr)
+	return nil
 }
 
 // VerifyUrlExpired email send
@@ -181,6 +186,27 @@ func (es *EmailService) RegisterTemplate(ctx context.Context, registerUrl string
 	return title, body, nil
 }
 
+func (es *EmailService) RegisterCodeTemplate(
+	ctx context.Context,
+	code string,
+	expiresMinutes int,
+) (title, body string, err error) {
+	siteInfo, err := es.siteInfoService.GetSiteGeneral(ctx)
+	if err != nil {
+		return "", "", err
+	}
+	templateData := &schema.RegisterCodeTemplateData{
+		SiteName:       siteInfo.Name,
+		Code:           code,
+		ExpiresMinutes: expiresMinutes,
+	}
+
+	lang := handler.GetLangByCtx(ctx)
+	title = translator.TrWithData(lang, constant.EmailTplKeyRegisterCodeTitle, templateData)
+	body = translator.TrWithData(lang, constant.EmailTplKeyRegisterCodeBody, templateData)
+	return title, body, nil
+}
+
 func (es *EmailService) PassResetTemplate(ctx context.Context, passResetUrl string) (title, body string, err error) {
 	siteInfo, err := es.siteInfoService.GetSiteGeneral(ctx)
 	if err != nil {
diff --git a/internal/service/forum_section/forum_section_service.go b/internal/service/forum_section/forum_section_service.go
new file mode 100644
index 000000000..e8f7db865
--- /dev/null
+++ b/internal/service/forum_section/forum_section_service.go
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package forum_section
+
+import (
+	"context"
+
+	"github.com/apache/answer/internal/base/reason"
+	"github.com/apache/answer/internal/entity"
+	"github.com/apache/answer/internal/schema"
+	"github.com/segmentfault/pacman/errors"
+)
+
+type Repo interface {
+	List(ctx context.Context) ([]*entity.ForumSection, error)
+	GetByID(ctx context.Context, id int64) (*entity.ForumSection, bool, error)
+	GetBySlug(ctx context.Context, slug string) (*entity.ForumSection, bool, error)
+}
+
+type Service struct {
+	repo Repo
+}
+
+func NewForumSectionService(repo Repo) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) ListTree(ctx context.Context) ([]*schema.ForumSectionResp, error) {
+	sections, err := s.repo.List(ctx)
+	if err != nil {
+		return nil, err
+	}
+	parents := make([]*schema.ForumSectionResp, 0)
+	parentMap := make(map[int64]*schema.ForumSectionResp)
+	for _, section := range sections {
+		item := toResp(section)
+		if section.ParentID == 0 {
+			parents = append(parents, item)
+			parentMap[section.ID] = item
+		}
+	}
+	for _, section := range sections {
+		if section.ParentID == 0 {
+			continue
+		}
+		if parent := parentMap[section.ParentID]; parent != nil {
+			parent.Children = append(parent.Children, toResp(section))
+		}
+	}
+	return parents, nil
+}
+
+func (s *Service) ValidatePostingSection(ctx context.Context, id int64, isAdmin bool) (*entity.ForumSection, error) {
+	section, exists, err := s.repo.GetByID(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	if !exists || section.Status != entity.ForumSectionStatusAvailable || section.ParentID == 0 {
+		return nil, errors.BadRequest(reason.ForumSectionInvalid)
+	}
+	if section.AdminOnly && !isAdmin {
+		return nil, errors.Forbidden(reason.ForumSectionAdminOnly)
+	}
+	return section, nil
+}
+
+func (s *Service) ResolveSectionIDs(ctx context.Context, slug string) ([]int64, bool, error) {
+	section, exists, err := s.repo.GetBySlug(ctx, slug)
+	if err != nil || !exists {
+		return nil, exists, err
+	}
+	if section.ParentID != 0 {
+		return []int64{section.ID}, true, nil
+	}
+	sections, err := s.repo.List(ctx)
+	if err != nil {
+		return nil, false, err
+	}
+	ids := make([]int64, 0)
+	for _, child := range sections {
+		if child.ParentID == section.ID {
+			ids = append(ids, child.ID)
+		}
+	}
+	return ids, true, nil
+}
+
+func toResp(section *entity.ForumSection) *schema.ForumSectionResp {
+	return &schema.ForumSectionResp{
+		ID: section.ID, ParentID: section.ParentID, Slug: section.Slug,
+		Name: section.Name, AdminOnly: section.AdminOnly, Children: make([]*schema.ForumSectionResp, 0),
+	}
+}
diff --git a/internal/service/forum_section/forum_section_service_test.go b/internal/service/forum_section/forum_section_service_test.go
new file mode 100644
index 000000000..db2ad3638
--- /dev/null
+++ b/internal/service/forum_section/forum_section_service_test.go
@@ -0,0 +1,93 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package forum_section
+
+import (
+	"context"
+	"testing"
+
+	"github.com/apache/answer/internal/entity"
+	"github.com/stretchr/testify/require"
+)
+
+type testRepo struct {
+	sections []*entity.ForumSection
+}
+
+func (r *testRepo) List(context.Context) ([]*entity.ForumSection, error) {
+	return r.sections, nil
+}
+
+func (r *testRepo) GetByID(_ context.Context, id int64) (*entity.ForumSection, bool, error) {
+	for _, section := range r.sections {
+		if section.ID == id {
+			return section, true, nil
+		}
+	}
+	return &entity.ForumSection{}, false, nil
+}
+
+func (r *testRepo) GetBySlug(_ context.Context, slug string) (*entity.ForumSection, bool, error) {
+	for _, section := range r.sections {
+		if section.Slug == slug {
+			return section, true, nil
+		}
+	}
+	return &entity.ForumSection{}, false, nil
+}
+
+func testSections() []*entity.ForumSection {
+	return []*entity.ForumSection{
+		{ID: 1, Slug: "site-management", Name: "站务管理", Status: 1},
+		{ID: 101, ParentID: 1, Slug: "site-announcements", Name: "站务公告", AdminOnly: true, Status: 1},
+		{ID: 102, ParentID: 1, Slug: "part-time-jobs", Name: "兼职信息中心", Status: 1},
+	}
+}
+
+func TestListTreeAndResolveParentSection(t *testing.T) {
+	service := NewForumSectionService(&testRepo{sections: testSections()})
+
+	tree, err := service.ListTree(context.Background())
+	require.NoError(t, err)
+	require.Len(t, tree, 1)
+	require.Len(t, tree[0].Children, 2)
+
+	ids, exists, err := service.ResolveSectionIDs(context.Background(), "site-management")
+	require.NoError(t, err)
+	require.True(t, exists)
+	require.ElementsMatch(t, []int64{101, 102}, ids)
+}
+
+func TestValidatePostingSectionPermissions(t *testing.T) {
+	service := NewForumSectionService(&testRepo{sections: testSections()})
+	ctx := context.Background()
+
+	_, err := service.ValidatePostingSection(ctx, 101, false)
+	require.Error(t, err)
+
+	_, err = service.ValidatePostingSection(ctx, 101, true)
+	require.NoError(t, err)
+
+	_, err = service.ValidatePostingSection(ctx, 102, false)
+	require.NoError(t, err)
+
+	_, err = service.ValidatePostingSection(ctx, 1, true)
+	require.Error(t, err)
+}
diff --git a/internal/service/importer/importer_service.go b/internal/service/importer/importer_service.go
index 9d12bf07b..a29b11331 100644
--- a/internal/service/importer/importer_service.go
+++ b/internal/service/importer/importer_service.go
@@ -23,9 +23,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/apache/answer/internal/base/handler"
 	"github.com/apache/answer/internal/base/reason"
-	"github.com/apache/answer/internal/base/translator"
 	"github.com/apache/answer/internal/base/validator"
 	"github.com/apache/answer/internal/schema"
 	"github.com/apache/answer/internal/service/content"
@@ -104,7 +102,7 @@ func (ip *ImporterService) ImportQuestion(ctx context.Context, questionInfo plug
 			DisplayName: tag,
 		}
 	}
-	canList, requireRanks, err := ip.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
+	canList, _, err := ip.rankService.CheckOperationPermissionsForRanks(ctx, req.UserID, []string{
 		permission.QuestionAdd,
 		permission.QuestionEdit,
 		permission.QuestionDelete,
@@ -135,10 +133,7 @@ func (ip *ImporterService) ImportQuestion(ctx context.Context, questionInfo plug
 		return err
 	}
 	if !req.CanAddTag && hasNewTag {
-		lang := handler.GetLangByCtx(ctx.(*gin.Context))
-		msg := translator.TrWithData(lang, reason.NoEnoughRankToOperate, &schema.PermissionTrTplData{Rank: requireRanks[6]})
-		log.Errorf("error: %v", msg)
-		return errors.BadRequest(msg)
+		return errors.BadRequest(reason.ForbiddenError)
 	}
 
 	errList, err := ip.questionService.CheckAddQuestion(ctx, req)
diff --git a/internal/service/notification/external_notification.go b/internal/service/notification/external_notification.go
index 5282cab0f..cc0679472 100644
--- a/internal/service/notification/external_notification.go
+++ b/internal/service/notification/external_notification.go
@@ -23,7 +23,6 @@ import (
 	"context"
 
 	"github.com/apache/answer/internal/base/data"
-	"github.com/apache/answer/internal/base/translator"
 	"github.com/apache/answer/internal/entity"
 	"github.com/apache/answer/internal/schema"
 	"github.com/apache/answer/internal/service/activity_common"
@@ -77,25 +76,18 @@ func NewExternalNotificationService(
 }
 
 func (ns *ExternalNotificationService) Handler(ctx context.Context, msg *schema.ExternalNotificationMsg) error {
-	log.Debugf("try to send external notification %+v", msg)
+	log.Debugf("content email notifications are disabled, handling external notification %+v", msg)
 
-	// If receiver not set language, use site default language.
-	if len(msg.ReceiverLang) == 0 || msg.ReceiverLang == translator.DefaultLangOption {
-		if interfaceInfo, _ := ns.siteInfoService.GetSiteInterface(ctx); interfaceInfo != nil {
-			msg.ReceiverLang = interfaceInfo.Language
-		}
-	}
+	// Content activity is delivered through the in-app notification queue.
+	// Keep plugin notifications for new questions, but never send content emails.
 	if msg.NewQuestionTemplateRawData != nil {
-		return ns.handleNewQuestionNotification(ctx, msg)
-	}
-	if msg.NewCommentTemplateRawData != nil {
-		return ns.handleNewCommentNotification(ctx, msg)
-	}
-	if msg.NewAnswerTemplateRawData != nil {
-		return ns.handleNewAnswerNotification(ctx, msg)
+		ns.syncNewQuestionNotificationToPlugin(ctx, msg)
+		return nil
 	}
-	if msg.NewInviteAnswerTemplateRawData != nil {
-		return ns.handleInviteAnswerNotification(ctx, msg)
+	if msg.NewCommentTemplateRawData != nil ||
+		msg.NewAnswerTemplateRawData != nil ||
+		msg.NewInviteAnswerTemplateRawData != nil {
+		return nil
 	}
 	log.Errorf("unknown notification message: %+v", msg)
 	return nil
diff --git a/internal/service/notification/external_notification_test.go b/internal/service/notification/external_notification_test.go
new file mode 100644
index 000000000..9e36d666a
--- /dev/null
+++ b/internal/service/notification/external_notification_test.go
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package notification
+
+import (
+	"context"
+	"testing"
+
+	"github.com/apache/answer/internal/schema"
+)
+
+func TestExternalNotificationHandlerSkipsContentEmails(t *testing.T) {
+	service := &ExternalNotificationService{}
+	tests := []struct {
+		name string
+		msg  *schema.ExternalNotificationMsg
+	}{
+		{
+			name: "new question",
+			msg: &schema.ExternalNotificationMsg{
+				NewQuestionTemplateRawData: &schema.NewQuestionTemplateRawData{},
+			},
+		},
+		{
+			name: "new answer",
+			msg: &schema.ExternalNotificationMsg{
+				NewAnswerTemplateRawData: &schema.NewAnswerTemplateRawData{},
+			},
+		},
+		{
+			name: "new comment",
+			msg: &schema.ExternalNotificationMsg{
+				NewCommentTemplateRawData: &schema.NewCommentTemplateRawData{},
+			},
+		},
+		{
+			name: "invite to answer",
+			msg: &schema.ExternalNotificationMsg{
+				NewInviteAnswerTemplateRawData: &schema.NewInviteAnswerTemplateRawData{},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := service.Handler(context.Background(), tt.msg); err != nil {
+				t.Fatalf("Handler() error = %v", err)
+			}
+		})
+	}
+}
diff --git a/internal/service/notification/invite_answer_notification.go b/internal/service/notification/invite_answer_notification.go
deleted file mode 100644
index 6b0407f9f..000000000
--- a/internal/service/notification/invite_answer_notification.go
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package notification
-
-import (
-	"context"
-	"time"
-
-	"github.com/apache/answer/internal/base/constant"
-	"github.com/apache/answer/internal/schema"
-	"github.com/segmentfault/pacman/i18n"
-	"github.com/segmentfault/pacman/log"
-)
-
-func (ns *ExternalNotificationService) handleInviteAnswerNotification(ctx context.Context,
-	msg *schema.ExternalNotificationMsg) error {
-	log.Debugf("try to send invite answer notification %+v", msg)
-
-	notificationConfig, exist, err := ns.userNotificationConfigRepo.GetByUserIDAndSource(ctx, msg.ReceiverUserID, constant.InboxSource)
-	if err != nil {
-		return err
-	}
-	if !exist {
-		return nil
-	}
-	channels := schema.NewNotificationChannelsFormJson(notificationConfig.Channels)
-	for _, channel := range channels {
-		if !channel.Enable {
-			continue
-		}
-		if channel.Key == constant.EmailChannel {
-			ns.sendInviteAnswerNotificationEmail(ctx, msg.ReceiverUserID, msg.ReceiverEmail, msg.ReceiverLang, msg.NewInviteAnswerTemplateRawData)
-		}
-	}
-	return nil
-}
-
-func (ns *ExternalNotificationService) sendInviteAnswerNotificationEmail(ctx context.Context,
-	userID, email, lang string, rawData *schema.NewInviteAnswerTemplateRawData) {
-	if unavailable := ns.checkUserStatusBeforeNotification(ctx, userID); unavailable {
-		return
-	}
-	codeContent := &schema.EmailCodeContent{
-		SourceType: schema.UnsubscribeSourceType,
-		NotificationSources: []constant.NotificationSource{
-			constant.InboxSource,
-		},
-		Email:                    email,
-		UserID:                   userID,
-		SkipValidationLatestCode: true,
-	}
-
-	// If receiver has set language, use it to send email.
-	if len(lang) > 0 {
-		ctx = context.WithValue(ctx, constant.AcceptLanguageContextKey, i18n.Language(lang))
-	}
-	title, body, err := ns.emailService.NewInviteAnswerTemplate(ctx, rawData)
-	if err != nil {
-		log.Error(err)
-		return
-	}
-
-	ns.emailService.SendAndSaveCodeWithTime(
-		ctx, userID, email, title, body, rawData.UnsubscribeCode, codeContent.ToJSONString(), 1*24*time.Hour)
-}
diff --git a/internal/service/notification/new_answer_notification.go b/internal/service/notification/new_answer_notification.go
deleted file mode 100644
index 4ae9ca9ea..000000000
--- a/internal/service/notification/new_answer_notification.go
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package notification
-
-import (
-	"context"
-	"time"
-
-	"github.com/apache/answer/internal/base/constant"
-	"github.com/apache/answer/internal/schema"
-	"github.com/segmentfault/pacman/i18n"
-	"github.com/segmentfault/pacman/log"
-)
-
-func (ns *ExternalNotificationService) handleNewAnswerNotification(ctx context.Context,
-	msg *schema.ExternalNotificationMsg) error {
-	log.Debugf("try to send new comment notification %+v", msg)
-
-	notificationConfig, exist, err := ns.userNotificationConfigRepo.GetByUserIDAndSource(ctx, msg.ReceiverUserID, constant.InboxSource)
-	if err != nil {
-		return err
-	}
-	if !exist {
-		return nil
-	}
-	channels := schema.NewNotificationChannelsFormJson(notificationConfig.Channels)
-	for _, channel := range channels {
-		if !channel.Enable {
-			continue
-		}
-		if channel.Key == constant.EmailChannel {
-			ns.sendNewAnswerNotificationEmail(ctx, msg.ReceiverUserID, msg.ReceiverEmail, msg.ReceiverLang, msg.NewAnswerTemplateRawData)
-		}
-	}
-	return nil
-}
-
-func (ns *ExternalNotificationService) sendNewAnswerNotificationEmail(ctx context.Context,
-	userID, email, lang string, rawData *schema.NewAnswerTemplateRawData) {
-	if unavailable := ns.checkUserStatusBeforeNotification(ctx, userID); unavailable {
-		return
-	}
-	codeContent := &schema.EmailCodeContent{
-		SourceType: schema.UnsubscribeSourceType,
-		NotificationSources: []constant.NotificationSource{
-			constant.InboxSource,
-		},
-		Email:                    email,
-		UserID:                   userID,
-		SkipValidationLatestCode: true,
-	}
-
-	// If receiver has set language, use it to send email.
-	if len(lang) > 0 {
-		ctx = context.WithValue(ctx, constant.AcceptLanguageContextKey, i18n.Language(lang))
-	}
-	title, body, err := ns.emailService.NewAnswerTemplate(ctx, rawData)
-	if err != nil {
-		log.Error(err)
-		return
-	}
-
-	ns.emailService.SendAndSaveCodeWithTime(
-		ctx, userID, email, title, body, rawData.UnsubscribeCode, codeContent.ToJSONString(), 1*24*time.Hour)
-}
diff --git a/internal/service/notification/new_comment_notification.go b/internal/service/notification/new_comment_notification.go
deleted file mode 100644
index 9734e54e5..000000000
--- a/internal/service/notification/new_comment_notification.go
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package notification
-
-import (
-	"context"
-	"time"
-
-	"github.com/apache/answer/internal/base/constant"
-	"github.com/apache/answer/internal/schema"
-	"github.com/segmentfault/pacman/i18n"
-	"github.com/segmentfault/pacman/log"
-)
-
-func (ns *ExternalNotificationService) handleNewCommentNotification(ctx context.Context,
-	msg *schema.ExternalNotificationMsg) error {
-	log.Debugf("try to send new comment notification %+v", msg)
-
-	notificationConfig, exist, err := ns.userNotificationConfigRepo.GetByUserIDAndSource(ctx, msg.ReceiverUserID, constant.InboxSource)
-	if err != nil {
-		return err
-	}
-	if !exist {
-		return nil
-	}
-	channels := schema.NewNotificationChannelsFormJson(notificationConfig.Channels)
-	for _, channel := range channels {
-		if !channel.Enable {
-			continue
-		}
-		if channel.Key == constant.EmailChannel {
-			ns.sendNewCommentNotificationEmail(ctx, msg.ReceiverUserID, msg.ReceiverEmail, msg.ReceiverLang, msg.NewCommentTemplateRawData)
-		}
-	}
-	return nil
-}
-
-func (ns *ExternalNotificationService) sendNewCommentNotificationEmail(ctx context.Context,
-	userID, email, lang string, rawData *schema.NewCommentTemplateRawData) {
-	if unavailable := ns.checkUserStatusBeforeNotification(ctx, userID); unavailable {
-		return
-	}
-	codeContent := &schema.EmailCodeContent{
-		SourceType: schema.UnsubscribeSourceType,
-		NotificationSources: []constant.NotificationSource{
-			constant.InboxSource,
-		},
-		Email:                    email,
-		UserID:                   userID,
-		SkipValidationLatestCode: true,
-	}
-	// If receiver has set language, use it to send email.
-	if len(lang) > 0 {
-		ctx = context.WithValue(ctx, constant.AcceptLanguageContextKey, i18n.Language(lang))
-	}
-	title, body, err := ns.emailService.NewCommentTemplate(ctx, rawData)
-	if err != nil {
-		log.Error(err)
-		return
-	}
-
-	ns.emailService.SendAndSaveCodeWithTime(
-		ctx, userID, email, title, body, rawData.UnsubscribeCode, codeContent.ToJSONString(), 1*24*time.Hour)
-}
diff --git a/internal/service/notification/notification_service.go b/internal/service/notification/notification_service.go
index 6a69cbaef..031b64f14 100644
--- a/internal/service/notification/notification_service.go
+++ b/internal/service/notification/notification_service.go
@@ -91,42 +91,9 @@ func (ns *NotificationService) GetRedDot(ctx context.Context, req *schema.GetRed
 		redBot.Revision = ns.countAllReviewAmount(ctx, req)
 	}
 
-	// get badge award
-	redBot.BadgeAward = ns.getBadgeAward(ctx, req.UserID)
 	return redBot, nil
 }
 
-func (ns *NotificationService) getBadgeAward(ctx context.Context, userID string) (badgeAward *schema.RedDotBadgeAward) {
-	key := fmt.Sprintf(constant.RedDotCacheKey, constant.NotificationTypeBadgeAchievement, userID)
-	cacheData, exist, err := ns.data.Cache.GetString(ctx, key)
-	if err != nil {
-		log.Errorf("get badge award failed: %v", err)
-		return nil
-	}
-	if !exist {
-		return nil
-	}
-
-	c := schema.NewRedDotBadgeAwardCache()
-	c.FromJSON(cacheData)
-	award := c.GetBadgeAward()
-	if award == nil {
-		return nil
-	}
-	badgeInfo, exists, err := ns.badgeRepo.GetByID(ctx, award.BadgeID)
-	if err != nil {
-		log.Errorf("get badge info failed: %v", err)
-		return nil
-	}
-	if !exists {
-		return nil
-	}
-	award.Name = translator.Tr(handler.GetLangByCtx(ctx), badgeInfo.Name)
-	award.Icon = badgeInfo.Icon
-	award.Level = badgeInfo.Level
-	return award
-}
-
 func (ns *NotificationService) countAllReviewAmount(ctx context.Context, req *schema.GetRedDot) (amount int64) {
 	// get queue amount
 	if req.IsAdmin {
diff --git a/internal/service/provider.go b/internal/service/provider.go
index d848272f7..aa1ed8746 100644
--- a/internal/service/provider.go
+++ b/internal/service/provider.go
@@ -42,6 +42,7 @@ import (
 	"github.com/apache/answer/internal/service/feature_toggle"
 	"github.com/apache/answer/internal/service/file_record"
 	"github.com/apache/answer/internal/service/follow"
+	forumsectionservice "github.com/apache/answer/internal/service/forum_section"
 	"github.com/apache/answer/internal/service/importer"
 	"github.com/apache/answer/internal/service/meta"
 	metacommon "github.com/apache/answer/internal/service/meta_common"
@@ -80,6 +81,7 @@ var ProviderSetService = wire.NewSet(
 	content.NewVoteService,
 	tag.NewTagService,
 	follow.NewFollowService,
+	forumsectionservice.NewForumSectionService,
 	collection.NewCollectionGroupService,
 	collection.NewCollectionService,
 	action.NewCaptchaService,
diff --git a/internal/service/question_common/question.go b/internal/service/question_common/question.go
index 3a7306342..88d8e7282 100644
--- a/internal/service/question_common/question.go
+++ b/internal/service/question_common/question.go
@@ -59,7 +59,7 @@ type QuestionRepo interface {
 	UpdateQuestion(ctx context.Context, question *entity.Question, Cols []string) (err error)
 	GetQuestion(ctx context.Context, id string) (question *entity.Question, exist bool, err error)
 	GetQuestionList(ctx context.Context, question *entity.Question) (questions []*entity.Question, err error)
-	GetQuestionPage(ctx context.Context, page, pageSize int, tagIDs []string, userID, orderCond string, inDays int, showHidden, showPending bool) (
+	GetQuestionPage(ctx context.Context, page, pageSize int, tagIDs []string, sectionIDs []int64, userID, orderCond string, inDays int, showHidden, showPending bool) (
 		questionList []*entity.Question, total int64, err error)
 	GetRecommendQuestionPageByTags(ctx context.Context, userID string, tagIDs, followedQuestionIDs []string, page, pageSize int) (questionList []*entity.Question, total int64, err error)
 	UpdateQuestionStatus(ctx context.Context, questionID string, status int) (err error)
@@ -154,6 +154,18 @@ func (qs *QuestionCommon) GetPersonalUserQuestionCount(ctx context.Context, logi
 	return qs.questionRepo.GetUserQuestionCount(ctx, userID, show)
 }
 
+// GetPersonalUserCommentCount returns the number of visible top-level forum
+// comments created by a user. Answers are the underlying storage model for
+// these comments, and deleted parent posts are excluded by the repository.
+func (qs *QuestionCommon) GetPersonalUserCommentCount(ctx context.Context, userID string) (count int64, err error) {
+	_, count, err = qs.AnswerCommon.PersonalAnswerPage(ctx, &entity.PersonalAnswerPageQueryCond{
+		Page:     1,
+		PageSize: 1,
+		UserID:   userID,
+	})
+	return count, err
+}
+
 func (qs *QuestionCommon) UpdatePv(ctx context.Context, questionID string) error {
 	return qs.questionRepo.UpdatePvCount(ctx, questionID)
 }
@@ -385,6 +397,7 @@ func (qs *QuestionCommon) FormatQuestionsPage(
 			LastAnswerID:     questionInfo.LastAnswerID,
 			Pin:              questionInfo.Pin,
 			Show:             questionInfo.Show,
+			SectionID:        questionInfo.SectionID,
 			Operator:         &schema.QuestionPageRespOperator{ID: questionInfo.UserID},
 		}
 
@@ -683,6 +696,7 @@ func (qs *QuestionCommon) ShowFormat(ctx context.Context, data *entity.Question)
 		}
 	}
 	info.Tags = make([]*schema.TagResp, 0)
+	info.SectionID = data.SectionID
 	return &info
 }
 func (qs *QuestionCommon) ShowFormatWithTag(ctx context.Context, data *entity.QuestionWithTagsRevision) *schema.QuestionInfoResp {
diff --git a/internal/service/rank/rank_service.go b/internal/service/rank/rank_service.go
index 6651091a1..346ce0a20 100644
--- a/internal/service/rank/rank_service.go
+++ b/internal/service/rank/rank_service.go
@@ -43,9 +43,29 @@ import (
 	"xorm.io/xorm"
 )
 
-const (
-	PermissionPrefix = "rank."
-)
+// isMemberPermission reports whether an available signed-in user can perform
+// the action without relying on reputation. Ownership and staff permissions
+// are checked separately.
+func isMemberPermission(action string) bool {
+	switch action {
+	case permission.QuestionAdd,
+		permission.QuestionVoteUp,
+		permission.QuestionVoteDown,
+		permission.AnswerAdd,
+		permission.AnswerVoteUp,
+		permission.AnswerVoteDown,
+		permission.AnswerInviteSomeoneToAnswer,
+		permission.CommentAdd,
+		permission.CommentVoteUp,
+		permission.CommentVoteDown,
+		permission.ReportAdd,
+		permission.TagAdd,
+		permission.VoteDetail:
+		return true
+	default:
+		return false
+	}
+}
 
 type UserRankRepo interface {
 	GetMaxDailyRank(ctx context.Context) (maxDailyRank int, err error)
@@ -92,7 +112,7 @@ func (rs *RankService) CheckOperationPermission(ctx context.Context, userID stri
 	}
 
 	// get the rank of the current user
-	userInfo, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
+	_, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
 	if err != nil {
 		return false, err
 	}
@@ -115,9 +135,7 @@ func (rs *RankService) CheckOperationPermission(ctx context.Context, userID stri
 			return true, nil
 		}
 	}
-
-	can, _ = rs.checkUserRank(ctx, userInfo.ID, userInfo.Rank, PermissionPrefix+action)
-	return can, nil
+	return isMemberPermission(action), nil
 }
 
 // CheckOperationPermissionsForRanks verify that the user has permission
@@ -130,7 +148,7 @@ func (rs *RankService) CheckOperationPermissionsForRanks(ctx context.Context, us
 	}
 
 	// get the rank of the current user
-	userInfo, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
+	_, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
 	if err != nil {
 		return can, requireRanks, err
 	}
@@ -144,9 +162,7 @@ func (rs *RankService) CheckOperationPermissionsForRanks(ctx context.Context, us
 			can[idx] = true
 			continue
 		}
-		meetRank, requireRank := rs.checkUserRank(ctx, userInfo.ID, userInfo.Rank, PermissionPrefix+action)
-		can[idx] = meetRank
-		requireRanks[idx] = requireRank
+		can[idx] = isMemberPermission(action)
 	}
 	return can, requireRanks, nil
 }
@@ -175,14 +191,14 @@ func (rs *RankService) CheckOperationObjectOwner(ctx context.Context, userID, ob
 }
 
 // CheckVotePermission verify that the user has vote permission
-func (rs *RankService) CheckVotePermission(ctx context.Context, userID, objectID string, voteUp bool) (
+func (rs *RankService) CheckVotePermission(ctx context.Context, userID, objectID string, _ bool) (
 	can bool, needRank int, err error) {
 	if len(userID) == 0 || len(objectID) == 0 {
 		return false, 0, nil
 	}
 
 	// get the rank of the current user
-	userInfo, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
+	_, exist, err := rs.userCommon.GetUserBasicInfoByID(ctx, userID)
 	if err != nil {
 		return can, 0, err
 	}
@@ -193,33 +209,16 @@ func (rs *RankService) CheckVotePermission(ctx context.Context, userID, objectID
 	if err != nil {
 		return can, 0, err
 	}
-	action := ""
 	switch objectInfo.ObjectType {
 	case constant.QuestionObjectType:
-		if voteUp {
-			action = permission.QuestionVoteUp
-		} else {
-			action = permission.QuestionVoteDown
-		}
+		return true, 0, nil
 	case constant.AnswerObjectType:
-		if voteUp {
-			action = permission.AnswerVoteUp
-		} else {
-			action = permission.AnswerVoteDown
-		}
+		return true, 0, nil
 	case constant.CommentObjectType:
-		if voteUp {
-			action = permission.CommentVoteUp
-		} else {
-			action = permission.CommentVoteDown
-		}
-	}
-	powerMapping := rs.getUserPowerMapping(ctx, userID)
-	if powerMapping[action] {
 		return true, 0, nil
+	default:
+		return false, 0, nil
 	}
-	can, needRank = rs.checkUserRank(ctx, userInfo.ID, userInfo.Rank, PermissionPrefix+action)
-	return can, needRank, nil
 }
 
 // getUserPowerMapping get user power mapping
@@ -242,23 +241,6 @@ func (rs *RankService) getUserPowerMapping(ctx context.Context, userID string) (
 	return powerMapping
 }
 
-// checkUserRank verify that the user meets the prestige criteria
-func (rs *RankService) checkUserRank(ctx context.Context, userID string, userRank int, action string) (
-	can bool, rank int) {
-	// get the amount of rank required for the current operation
-	requireRank, err := rs.configService.GetIntValue(ctx, action)
-	if err != nil {
-		log.Error(err)
-		return false, requireRank
-	}
-	if userRank < requireRank || requireRank < 0 {
-		log.Debugf("user %s want to do action %s, but rank %d < %d",
-			userID, action, userRank, requireRank)
-		return false, requireRank
-	}
-	return true, requireRank
-}
-
 // GetRankPersonalPage get personal comment list page
 func (rs *RankService) GetRankPersonalPage(ctx context.Context, req *schema.GetRankPersonalWithPageReq) (
 	pageModel *pager.PageModel, err error) {
diff --git a/internal/service/rank/rank_service_test.go b/internal/service/rank/rank_service_test.go
new file mode 100644
index 000000000..0805113d8
--- /dev/null
+++ b/internal/service/rank/rank_service_test.go
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package rank
+
+import (
+	"testing"
+
+	"github.com/apache/answer/internal/service/permission"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsMemberPermission(t *testing.T) {
+	tests := map[string]bool{
+		permission.QuestionAdd:                 true,
+		permission.QuestionVoteUp:              true,
+		permission.QuestionVoteDown:            true,
+		permission.AnswerAdd:                   true,
+		permission.AnswerVoteUp:                true,
+		permission.AnswerVoteDown:              true,
+		permission.AnswerInviteSomeoneToAnswer: true,
+		permission.CommentAdd:                  true,
+		permission.CommentVoteUp:               true,
+		permission.CommentVoteDown:             true,
+		permission.ReportAdd:                   true,
+		permission.TagAdd:                      true,
+		permission.VoteDetail:                  true,
+		permission.QuestionEdit:                false,
+		permission.QuestionDelete:              false,
+		permission.QuestionAudit:               false,
+		permission.QuestionPin:                 false,
+		permission.TagEdit:                     false,
+	}
+
+	for action, expected := range tests {
+		t.Run(action, func(t *testing.T) {
+			require.Equal(t, expected, isMemberPermission(action))
+		})
+	}
+}
diff --git a/internal/service/registration/security.go b/internal/service/registration/security.go
new file mode 100644
index 000000000..110f3e57e
--- /dev/null
+++ b/internal/service/registration/security.go
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package registration
+
+import (
+	"context"
+	"time"
+)
+
+const (
+	EmailCodeTTL                 = 10 * time.Minute
+	EmailCodeVerificationLockTTL = time.Minute
+	EmailCooldown                = time.Minute
+	EmailHourlyWindow            = time.Hour
+	EmailHourlyLimit             = int64(5)
+	IPHourlyWindow               = time.Hour
+	IPHourlyLimit                = int64(100)
+)
+
+// SecurityRepo stores one-time registration codes and applies shared limits.
+type SecurityRepo interface {
+	CheckAndRecordSendLimit(ctx context.Context, email, ip string) (retryAfter time.Duration, err error)
+	SaveEmailCode(ctx context.Context, email, code string, ttl time.Duration) error
+	VerifyAndLockEmailCode(ctx context.Context, email, code string) (verificationToken string, matched bool, err error)
+	DeleteEmailCodeIfMatches(ctx context.Context, email, code string) (bool, error)
+	ReleaseEmailCodeLock(ctx context.Context, email, verificationToken string) error
+}
diff --git a/internal/service/tag_common/tag_common.go b/internal/service/tag_common/tag_common.go
index 87b53f396..3ab4726d1 100644
--- a/internal/service/tag_common/tag_common.go
+++ b/internal/service/tag_common/tag_common.go
@@ -270,6 +270,11 @@ func (ts *TagCommonService) GetTagListByNames(ctx context.Context, tagNames []st
 }
 
 func (ts *TagCommonService) ExistRecommend(ctx context.Context, tags []*schema.TagItem) (bool, error) {
+	// Tags are optional. Only enforce recommended-tag rules after a user adds a tag.
+	if len(tags) == 0 {
+		return true, nil
+	}
+
 	taginfo, err := ts.siteInfoService.GetSiteTag(ctx)
 	if err != nil {
 		return false, err
@@ -660,7 +665,7 @@ func (ts *TagCommonService) CheckChangeReservedTag(ctx context.Context, oldobjec
 // ObjectChangeTag change object tag list
 func (ts *TagCommonService) ObjectChangeTag(ctx context.Context, objectTagData *schema.TagChange, minimumTags int) (errorlist []*validator.FormErrorField, err error) {
 	// checks if the tags sent in the put req are less than the minimum, if so, tag changes are not applied
-	if len(objectTagData.Tags) < minimumTags {
+	if len(objectTagData.Tags) > 0 && len(objectTagData.Tags) < minimumTags {
 		errorlist := make([]*validator.FormErrorField, 0)
 		errorlist = append(errorlist, &validator.FormErrorField{
 			ErrorField: "tags",
diff --git a/internal/service/user_notification_config/user_notification_config_service.go b/internal/service/user_notification_config/user_notification_config_service.go
index 8ab72fa94..346a1a540 100644
--- a/internal/service/user_notification_config/user_notification_config_service.go
+++ b/internal/service/user_notification_config/user_notification_config_service.go
@@ -93,7 +93,7 @@ func (us *UserNotificationConfigService) UpdateUserNotificationConfig(
 func (us *UserNotificationConfigService) SetDefaultUserNotificationConfig(ctx context.Context, userIDs []string) (
 	err error) {
 	return us.userNotificationConfigRepo.Add(ctx, userIDs,
-		string(constant.InboxSource), `[{"key":"email","enable":true}]`)
+		string(constant.InboxSource), `[{"key":"email","enable":false}]`)
 }
 
 func (us *UserNotificationConfigService) convertToEntity(_ context.Context, userID string,
diff --git a/licenserc.toml b/licenserc.toml
index 4e1b4b7e5..04dce5b62 100644
--- a/licenserc.toml
+++ b/licenserc.toml
@@ -30,6 +30,8 @@ excludes = [
   "ui/.browserslistrc",
   "ui/.npmrc",
   "ui/.env.*",
+  ".env.example",
+  "deploy/production/.env.example",
   "script/plugin_list",
   "charts/templates/_helpers.tpl",
   "charts/.helmignore",
diff --git a/pkg/checker/email.go b/pkg/checker/email.go
index a9732fdf0..12239d712 100644
--- a/pkg/checker/email.go
+++ b/pkg/checker/email.go
@@ -26,8 +26,16 @@ func EmailInAllowEmailDomain(email string, allowEmailDomains []string) bool {
 		return true
 	}
 
+	email = strings.TrimSpace(email)
+	at := strings.LastIndex(email, "@")
+	if at <= 0 || at != strings.Index(email, "@") || at == len(email)-1 {
+		return false
+	}
+	emailDomain := email[at+1:]
+
 	for _, domain := range allowEmailDomains {
-		if strings.HasSuffix(email, domain) {
+		domain = strings.TrimSpace(strings.TrimPrefix(domain, "@"))
+		if domain != "" && strings.EqualFold(emailDomain, domain) {
 			return true
 		}
 	}
diff --git a/pkg/checker/email_test.go b/pkg/checker/email_test.go
new file mode 100644
index 000000000..ad15628b1
--- /dev/null
+++ b/pkg/checker/email_test.go
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package checker
+
+import "testing"
+
+func TestEmailInAllowEmailDomain(t *testing.T) {
+	allowed := []string{"hainanu.edu.cn", "@alumni.hainanu.edu.cn"}
+	tests := []struct {
+		name  string
+		email string
+		want  bool
+	}{
+		{name: "student email", email: "student@hainanu.edu.cn", want: true},
+		{name: "alumni email", email: "alumni@alumni.hainanu.edu.cn", want: true},
+		{name: "case insensitive", email: "student@HAINANU.EDU.CN", want: true},
+		{name: "surrounding spaces", email: " student@hainanu.edu.cn ", want: true},
+		{name: "subdomain is not exact", email: "student@mail.hainanu.edu.cn", want: false},
+		{name: "prefixed domain", email: "student@evil-hainanu.edu.cn", want: false},
+		{name: "suffixed domain", email: "student@hainanu.edu.cn.evil.com", want: false},
+		{name: "multiple at signs", email: "student@evil@hainanu.edu.cn", want: false},
+		{name: "missing local part", email: "@hainanu.edu.cn", want: false},
+		{name: "missing domain", email: "student@", want: false},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			if got := EmailInAllowEmailDomain(test.email, allowed); got != test.want {
+				t.Fatalf("EmailInAllowEmailDomain(%q) = %v, want %v", test.email, got, test.want)
+			}
+		})
+	}
+}
+
+func TestEmailInAllowEmailDomainAllowsAllWhenUnconfigured(t *testing.T) {
+	if !EmailInAllowEmailDomain("any@example.com", nil) {
+		t.Fatal("an empty allow list should preserve the existing allow-all behavior")
+	}
+}
diff --git a/ui/.env.development b/ui/.env.development
index a634cee2e..cadfdb014 100644
--- a/ui/.env.development
+++ b/ui/.env.development
@@ -1,2 +1,4 @@
-PUBLIC_URL
-REACT_APP_API_URL = http://10.0.20.84:8080/
+PUBLIC_URL=/
+  REACT_APP_API_URL=http://127.0.0.1:9080/
+  REACT_APP_BASE_URL=
+  REACT_APP_API_BASE_URL=
diff --git a/ui/public/manifest.json b/ui/public/manifest.json
index a92240fba..5abf40f8c 100644
--- a/ui/public/manifest.json
+++ b/ui/public/manifest.json
@@ -1,6 +1,6 @@
 {
-  "short_name": "Answer",
-  "name": "Apache Answer",
+  "short_name": "Dongpolakeside",
+  "name": "Dongpolakeside",
   "icons": [
     {
       "src": "favicon.ico",
diff --git a/ui/src/common/constants.ts b/ui/src/common/constants.ts
index 862072817..c8569826e 100644
--- a/ui/src/common/constants.ts
+++ b/ui/src/common/constants.ts
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-export const DEFAULT_SITE_NAME = 'Answer';
+export const DEFAULT_SITE_NAME = 'Dongpolakeside';
 export const DEFAULT_LANG = 'en_US';
 export const CURRENT_LANG_STORAGE_KEY = '_a_lang_';
 export const LANG_RESOURCE_STORAGE_KEY = '_a_lang_r_';
@@ -116,8 +116,7 @@ export const ADMIN_NAV_MENUS = [
     icon: 'people-fill',
     children: [
       { name: 'users', pathPrefix: 'users/' },
-      { name: 'badges' },
-      { name: 'rules', path: 'rules/privileges', pathPrefix: 'rules/' },
+      { name: 'rules', path: 'rules/policies', pathPrefix: 'rules/' },
     ],
   },
   {
@@ -179,7 +178,6 @@ export const ADMIN_USERS_NAV_MENUS = [
 ];
 
 export const ADMIN_RULES_NAV_MENUS = [
-  { name: 'privileges', path: '/admin/rules/privileges' },
   { name: 'policies', path: '/admin/rules/policies' },
 ];
 
diff --git a/ui/src/common/interface.ts b/ui/src/common/interface.ts
index 8ab714230..a036028f5 100644
--- a/ui/src/common/interface.ts
+++ b/ui/src/common/interface.ts
@@ -83,6 +83,16 @@ export interface QuestionParams extends ImgCodeReq {
   url_title?: string;
   content: string;
   tags: Tag[];
+  section_id?: number;
+}
+
+export interface ForumSection {
+  id: number;
+  parent_id: number;
+  slug: string;
+  name: string;
+  admin_only: boolean;
+  children: ForumSection[];
 }
 
 export interface QuestionWithAnswer extends QuestionParams {
@@ -112,6 +122,12 @@ export interface LoginReqParams {
 
 export interface RegisterReqParams extends LoginReqParams {
   name: string;
+  pass_confirm: string;
+  email_code: string;
+}
+
+export interface RegisterEmailCodeReq extends ImgCodeReq {
+  e_mail: string;
 }
 
 export interface ModifyPasswordReq {
@@ -130,7 +146,7 @@ export interface ModifyUserReq {
   website: string;
 }
 
-enum RoleId {
+export enum RoleId {
   User = 1,
   Admin = 2,
   Moderator = 3,
@@ -161,6 +177,10 @@ export interface UserInfoBase {
 export interface UserInfoRes extends UserInfoBase {
   bio: string;
   bio_html: string;
+  post_count?: number;
+  comment_count?: number;
+  question_count?: number;
+  answer_count?: number;
   create_time?: string;
   /**
    * value = 1 active;
@@ -308,6 +328,7 @@ export interface QueryQuestionsReq extends Paging {
   order: QuestionOrderBy;
   tag?: string;
   in_days?: number;
+  section?: string;
 }
 
 export type AdminQuestionStatus =
diff --git a/ui/src/components/BaseUserCard/index.tsx b/ui/src/components/BaseUserCard/index.tsx
index f171bc2ca..858ddf830 100644
--- a/ui/src/components/BaseUserCard/index.tsx
+++ b/ui/src/components/BaseUserCard/index.tsx
@@ -21,13 +21,11 @@ import { memo, FC } from 'react';
 import { Link } from 'react-router-dom';
 
 import { Avatar } from '@/components';
-import { formatCount } from '@/utils';
 
 interface Props {
   data: any;
   showAvatar?: boolean;
   avatarSize?: string;
-  showReputation?: boolean;
   avatarSearchStr?: string;
   className?: string;
   avatarClass?: string;
@@ -41,7 +39,6 @@ const Index: FC<Props> = ({
   avatarSize = '24px',
   className = 'small',
   avatarSearchStr = 's=48',
-  showReputation = true,
   nameMaxWidth = '300px',
 }) => {
   return (
@@ -82,12 +79,6 @@ const Index: FC<Props> = ({
           <span className="me-1 name-ellipsis">{data?.display_name}</span>
         </>
       )}
-
-      {showReputation && (
-        <span className="fw-bold" title="Reputation">
-          {formatCount(data?.rank)}
-        </span>
-      )}
     </div>
   );
 };
diff --git a/ui/src/components/CampusSectionNav/index.scss b/ui/src/components/CampusSectionNav/index.scss
new file mode 100644
index 000000000..84689878e
--- /dev/null
+++ b/ui/src/components/CampusSectionNav/index.scss
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+.campus-section-nav {
+  width: 100%;
+
+  .accordion {
+    --bs-accordion-border-width: 0;
+    --bs-accordion-bg: transparent;
+    --bs-accordion-btn-bg: transparent;
+    --bs-accordion-active-bg: transparent;
+    --bs-accordion-active-color: var(--an-side-nav-link);
+    --bs-accordion-btn-focus-box-shadow: none;
+  }
+
+  .campus-section-group {
+    border: 0;
+    background: transparent;
+  }
+
+  .accordion-button {
+    padding: 0.5rem 1rem;
+    border-radius: var(--bs-border-radius);
+    color: var(--an-side-nav-link);
+    font-size: 1rem;
+    box-shadow: none;
+  }
+
+  .accordion-button,
+  .accordion-button:not(.collapsed),
+  .accordion-button:focus,
+  .accordion-button:focus-visible,
+  .campus-section-link,
+  .campus-section-link:focus,
+  .campus-section-link:focus-visible,
+  .campus-section-link.active {
+    box-shadow: none !important;
+  }
+
+  .accordion-button:hover {
+    color: var(--an-side-nav-link-hover-color);
+    background-color: var(--bs-tertiary-bg);
+  }
+
+  .accordion-button::after {
+    width: 0.8rem;
+    height: 0.8rem;
+    background-size: 0.8rem;
+  }
+
+  .accordion-body {
+    padding: 0 0 0.35rem 2.5rem;
+  }
+
+  .campus-section-link {
+    padding: 0.35rem 0.75rem;
+    border-radius: var(--bs-border-radius);
+    color: var(--an-side-nav-link);
+    text-decoration: none;
+    font-size: 0.875rem;
+  }
+
+  .campus-section-link:hover {
+    color: var(--an-side-nav-link-hover-color);
+    background-color: var(--bs-tertiary-bg);
+  }
+
+  .campus-section-link.active {
+    color: var(--an-side-nav-link-hover-color);
+    background-color: var(--bs-secondary-bg);
+    font-weight: 600;
+  }
+
+  .campus-section-note {
+    color: var(--bs-secondary-color);
+    font-size: 0.75rem;
+  }
+}
diff --git a/ui/src/components/CampusSectionNav/index.tsx b/ui/src/components/CampusSectionNav/index.tsx
new file mode 100644
index 000000000..75ee8e988
--- /dev/null
+++ b/ui/src/components/CampusSectionNav/index.tsx
@@ -0,0 +1,138 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { FC } from 'react';
+import { Accordion, Form, Placeholder } from 'react-bootstrap';
+import { Link, useLocation, useSearchParams } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
+
+import { useForumSections } from '@/services';
+import Icon from '@/components/Icon';
+
+import './index.scss';
+
+interface Props {
+  mobile?: boolean;
+}
+
+const SECTION_ICONS: Record<string, string> = {
+  'career-future': 'briefcase-fill',
+  'hainanu-campus': 'building-fill',
+  'technology-life': 'laptop-fill',
+  'life-information': 'basket-fill',
+  'site-management': 'megaphone-fill',
+};
+
+const CampusSectionNav: FC<Props> = ({ mobile = false }) => {
+  const { t } = useTranslation('translation', { keyPrefix: 'campus_forum' });
+  const { data, isLoading } = useForumSections();
+  const { pathname } = useLocation();
+  const [searchParams, setSearchParams] = useSearchParams();
+  const current = searchParams.get('section') || '';
+
+  const sectionHref = (slug = '') => {
+    const params = new URLSearchParams(searchParams);
+    params.delete('page');
+    if (slug) params.set('section', slug);
+    else params.delete('section');
+    return `/questions?${params.toString()}`;
+  };
+
+  if (mobile) {
+    return (
+      <Form.Select
+        className="mb-3 d-lg-none"
+        aria-label={t('sections')}
+        value={current}
+        onChange={(event) => {
+          const params = new URLSearchParams(searchParams);
+          params.delete('page');
+          if (event.target.value) params.set('section', event.target.value);
+          else params.delete('section');
+          setSearchParams(params);
+        }}>
+        <option value="">{t('all_sections')}</option>
+        {data.map((parent) => (
+          <optgroup key={parent.id} label={parent.name}>
+            {parent.children.map((child) => (
+              <option key={child.id} value={child.slug}>
+                {child.name}
+              </option>
+            ))}
+          </optgroup>
+        ))}
+      </Form.Select>
+    );
+  }
+
+  return (
+    <div className="campus-section-nav mt-3">
+      <div className="campus-section-title px-3 pb-2 small fw-bold text-secondary">
+        {t('sections')}
+      </div>
+      {isLoading ? (
+        <Placeholder as="div" animation="glow" className="px-3 pb-3">
+          <Placeholder xs={8} />
+        </Placeholder>
+      ) : (
+        <Accordion
+          alwaysOpen
+          flush
+          defaultActiveKey={data.map((item) => String(item.id))}>
+          {data.map((parent) => (
+            <Accordion.Item
+              key={parent.id}
+              eventKey={String(parent.id)}
+              className="campus-section-group">
+              <Accordion.Header>
+                <Icon
+                  name={SECTION_ICONS[parent.slug] || 'folder-fill'}
+                  className="me-2"
+                />
+                <span>{parent.name}</span>
+              </Accordion.Header>
+              <Accordion.Body>
+                {parent.children.map((child) => (
+                  <Link
+                    key={child.id}
+                    to={sectionHref(child.slug)}
+                    aria-current={
+                      pathname === '/questions' && current === child.slug
+                        ? 'page'
+                        : undefined
+                    }
+                    className={`campus-section-link campus-section-child d-block ${pathname === '/questions' && current === child.slug ? 'active' : ''}`}>
+                    {child.name}
+                    {child.admin_only ? (
+                      <span className="campus-section-note ms-1">
+                        · {t('admin_only')}
+                      </span>
+                    ) : null}
+                  </Link>
+                ))}
+              </Accordion.Body>
+            </Accordion.Item>
+          ))}
+        </Accordion>
+      )}
+    </div>
+  );
+};
+
+export default CampusSectionNav;
diff --git a/ui/src/components/Counts/index.tsx b/ui/src/components/Counts/index.tsx
index ef1723772..fba03e3db 100644
--- a/ui/src/components/Counts/index.tsx
+++ b/ui/src/components/Counts/index.tsx
@@ -36,6 +36,7 @@ interface Props {
   showViews?: boolean;
   showAccepted?: boolean;
   isAccepted?: boolean;
+  answersLabel?: 'answers' | 'comments';
   className?: string;
 }
 const Index: FC<Props> = ({
@@ -45,6 +46,7 @@ const Index: FC<Props> = ({
   showViews = true,
   isAccepted = false,
   showAccepted = false,
+  answersLabel = 'answers',
   className = '',
 }) => {
   const { t } = useTranslation('translation', { keyPrefix: 'counts' });
@@ -77,7 +79,7 @@ const Index: FC<Props> = ({
             <Icon name="chat-square-text-fill me-1" />
           )}
           <span className="fw-medium">{data.answers}</span>
-          <span className="ms-1">{t('answers')}</span>
+          <span className="ms-1">{t(answersLabel)}</span>
         </div>
       )}
       {showViews && (
diff --git a/ui/src/components/Header/components/NavItems/index.tsx b/ui/src/components/Header/components/NavItems/index.tsx
index 61733695d..dc0d3433f 100644
--- a/ui/src/components/Header/components/NavItems/index.tsx
+++ b/ui/src/components/Header/components/NavItems/index.tsx
@@ -34,6 +34,8 @@ interface Props {
   logOut: (e) => void;
 }
 
+const formatUnreadCount = (count = 0) => (count > 99 ? '99+' : count);
+
 const Index: FC<Props> = ({ redDot, userInfo, logOut }) => {
   const { t } = useTranslation();
   const navigate = useNavigate();
@@ -57,11 +59,12 @@ const Index: FC<Props> = ({ redDot, userInfo, logOut }) => {
           className="icon-link nav-link d-flex align-items-center justify-content-center p-0 me-2 position-relative">
           <Icon name="bell-fill" className="fs-4" />
           {(redDot?.inbox || 0) > 0 && (
-            <div className="unread-dot bg-danger">
+            <span className="unread-count badge rounded-pill bg-danger">
+              {formatUnreadCount(redDot?.inbox)}
               <span className="visually-hidden">
                 {t('new_alerts', { keyPrefix: 'notifications' })}
               </span>
-            </div>
+            </span>
           )}
         </NavLink>
 
@@ -71,11 +74,12 @@ const Index: FC<Props> = ({ redDot, userInfo, logOut }) => {
           className="icon-link nav-link d-flex align-items-center justify-content-center p-0 me-2 position-relative">
           <Icon name="trophy-fill" className="fs-4" />
           {(redDot?.achievement || 0) > 0 && (
-            <div className="unread-dot bg-danger">
+            <span className="unread-count badge rounded-pill bg-danger">
+              {formatUnreadCount(redDot?.achievement)}
               <span className="visually-hidden">
                 {t('new_alerts', { keyPrefix: 'notifications' })}
               </span>
-            </div>
+            </span>
           )}
         </NavLink>
       </Nav>
diff --git a/ui/src/components/Header/index.tsx b/ui/src/components/Header/index.tsx
index 22aad5aa1..6254f5cb3 100644
--- a/ui/src/components/Header/index.tsx
+++ b/ui/src/components/Header/index.tsx
@@ -35,6 +35,9 @@ import {
 } from '@/stores';
 import { logout, useQueryNotificationStatus } from '@/services';
 import { Icon, MobileSideNav } from '@/components';
+import Storage from '@/utils/storage';
+import { RouteAlias, BASE_ORIGIN } from '@/router/alias';
+import { REDIRECT_PATH_STORAGE_KEY } from '@/common/constants';
 
 import NavItems from './components/NavItems';
 import SearchInput from './components/SearchInput';
@@ -73,7 +76,8 @@ const Header: FC = () => {
     evt.preventDefault();
     await logout();
     clearUserStore();
-    window.location.replace(window.location.href);
+    Storage.remove(REDIRECT_PATH_STORAGE_KEY);
+    window.location.replace(`${BASE_ORIGIN}${RouteAlias.home}`);
   };
 
   useEffect(() => {
diff --git a/ui/src/components/PinList/index.tsx b/ui/src/components/PinList/index.tsx
index be60b9a92..984dcef09 100644
--- a/ui/src/components/PinList/index.tsx
+++ b/ui/src/components/PinList/index.tsx
@@ -59,12 +59,12 @@ const PinList: FC<IProps> = ({ data }) => {
                 </h6>
 
                 <Counts
+                  answersLabel="comments"
                   data={{
                     votes: item.vote_count,
                     answers: item.answer_count,
                     views: item.view_count,
                   }}
-                  isAccepted={item.accepted_answer_id >= 1}
                   showViews={false}
                   className="mt-2 mt-md-0 small text-secondary"
                 />
diff --git a/ui/src/components/QuestionList/index.tsx b/ui/src/components/QuestionList/index.tsx
index 3d770dbe5..e766bff8f 100644
--- a/ui/src/components/QuestionList/index.tsx
+++ b/ui/src/components/QuestionList/index.tsx
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { FC, useEffect, useState } from 'react';
+import { FC, useEffect, useMemo, useState } from 'react';
 import { ListGroup, Dropdown } from 'react-bootstrap';
 import { NavLink, useSearchParams, useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
@@ -39,6 +39,7 @@ import * as Type from '@/common/interface';
 import { useSkeletonControl } from '@/hooks';
 import Storage from '@/utils/storage';
 import { LIST_VIEW_STORAGE_KEY } from '@/common/constants';
+import { useForumSections } from '@/services';
 
 export const QUESTION_ORDER_KEYS: Type.QuestionOrderBy[] = [
   'newest',
@@ -82,6 +83,14 @@ const QuestionList: FC<Props> = ({
   );
 
   const [viewType, setViewType] = useState('card');
+  const { data: forumSections } = useForumSections();
+  const sectionMap = useMemo(() => {
+    const mapping = new Map<number, Type.ForumSection>();
+    forumSections.forEach((parent) => {
+      parent.children.forEach((child) => mapping.set(child.id, child));
+    });
+    return mapping;
+  }, [forumSections]);
 
   const handleViewMode = (key) => {
     Storage.set(LIST_VIEW_STORAGE_KEY, key);
@@ -188,6 +197,14 @@ const QuestionList: FC<Props> = ({
                   )}
 
                   <div className="question-tags mb-12">
+                    {sectionMap.has(li.section_id) ? (
+                      <NavLink
+                        to={`/questions?section=${sectionMap.get(li.section_id)?.slug}`}
+                        className="badge text-bg-primary text-decoration-none me-1"
+                        onClick={(e) => e.stopPropagation()}>
+                        {sectionMap.get(li.section_id)?.name}
+                      </NavLink>
+                    ) : null}
                     {Array.isArray(li.tags)
                       ? li.tags.map((tag, index) => {
                           return (
@@ -204,12 +221,12 @@ const QuestionList: FC<Props> = ({
                   </div>
                   <div className="small text-secondary">
                     <Counts
+                      answersLabel="comments"
                       data={{
                         votes: li.vote_count,
                         answers: li.answer_count,
                         views: li.view_count,
                       }}
-                      isAccepted={li.accepted_answer_id >= 1}
                       className="mt-2 mt-md-0"
                     />
                   </div>
diff --git a/ui/src/components/Share/index.tsx b/ui/src/components/Share/index.tsx
index d63147b19..284b678e2 100644
--- a/ui/src/components/Share/index.tsx
+++ b/ui/src/components/Share/index.tsx
@@ -26,7 +26,7 @@ import copy from 'copy-to-clipboard';
 import classNames from 'classnames';
 
 import { BASE_ORIGIN } from '@/router/alias';
-import { loggedUserInfoStore } from '@/stores';
+import { loggedUserInfoStore, siteInfoStore } from '@/stores';
 
 interface IProps {
   type: 'answer' | 'question';
@@ -40,6 +40,7 @@ interface IProps {
 
 const Index: FC<IProps> = ({ type, qid, aid, title, className, mode }) => {
   const user = loggedUserInfoStore((state) => state.user);
+  const siteName = siteInfoStore((state) => state.siteInfo.name);
   const [show, setShow] = useState(false);
   const [showTip, setShowTip] = useState(false);
   const [canSystemShare, setSystemShareState] = useState(false);
@@ -72,7 +73,7 @@ const Index: FC<IProps> = ({ type, qid, aid, title, className, mode }) => {
   const systemShare = () => {
     navigator.share({
       title,
-      text: `${title} - Answer：`,
+      text: `${title} - ${siteName}：`,
       url: baseUrl,
     });
   };
diff --git a/ui/src/components/SideNav/index.scss b/ui/src/components/SideNav/index.scss
index 27894d77c..ba9cb1d43 100644
--- a/ui/src/components/SideNav/index.scss
+++ b/ui/src/components/SideNav/index.scss
@@ -27,21 +27,30 @@
 }
 
 #sideNav {
+  min-height: 100%;
   max-width: 208px;
+
   .nav-link {
     color: var(--an-side-nav-link);
   }
+
   .nav-link:focus-visible {
     box-shadow: none;
   }
+
   .nav-link:hover {
     color: var(--an-side-nav-link-hover-color);
     background-color: var(--bs-gray-100);
   }
+
   .nav-link.active {
     color: var(--an-side-nav-link-hover-color);
     background-color: var(--bs-gray-200);
   }
+
+  .side-nav-admin {
+    border-top: 1px solid var(--bs-border-color);
+  }
 }
 
 @media screen and (max-width: 991.9px) {
diff --git a/ui/src/components/SideNav/index.tsx b/ui/src/components/SideNav/index.tsx
index 54d2f6a47..fbba31e30 100644
--- a/ui/src/components/SideNav/index.tsx
+++ b/ui/src/components/SideNav/index.tsx
@@ -19,11 +19,16 @@
 
 import { FC } from 'react';
 import { Nav } from 'react-bootstrap';
-import { NavLink, useLocation, useNavigate } from 'react-router-dom';
+import {
+  NavLink,
+  useLocation,
+  useNavigate,
+  useSearchParams,
+} from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 
 import { loggedUserInfoStore, sideNavStore, aiControlStore } from '@/stores';
-import { Icon, PluginRender } from '@/components';
+import { Icon, PluginRender, CampusSectionNav } from '@/components';
 import { PluginType } from '@/utils/pluginKit';
 import request from '@/utils/request';
 
@@ -32,71 +37,67 @@ import './index.scss';
 const Index: FC = () => {
   const { t } = useTranslation();
   const { pathname } = useLocation();
+  const [searchParams] = useSearchParams();
   const { user: userInfo } = loggedUserInfoStore();
   const { can_revision, revision } = sideNavStore();
   const { ai_enabled } = aiControlStore();
   const navigate = useNavigate();
 
   return (
-    <Nav variant="pills" className="flex-column" id="sideNav">
-      <NavLink
-        to="/questions"
-        className={({ isActive }) =>
-          isActive || pathname === '/' ? 'nav-link active' : 'nav-link'
-        }>
-        <Icon name="question-circle-fill" className="me-2" />
-        <span>{t('header.nav.question')}</span>
-      </NavLink>
-
-      {ai_enabled && (
+    <div className="side-nav-content d-flex h-100 flex-column" id="sideNav">
+      <Nav variant="pills" className="flex-column">
         <NavLink
-          to="/ai-assistant"
+          to="/"
+          end
           className={() =>
-            pathname === '/ai-assistant' ? 'nav-link active' : 'nav-link'
+            pathname === '/' ||
+            (pathname === '/questions' && !searchParams.has('section'))
+              ? 'nav-link active'
+              : 'nav-link'
           }>
-          <Icon name="chat-square-text-fill" className="me-2" />
-          <span>{t('ai_assistant', { keyPrefix: 'page_title' })}</span>
+          <Icon name="house-door-fill" className="me-2" />
+          <span>{t('header.nav.question')}</span>
         </NavLink>
-      )}
-
-      <NavLink
-        to="/tags"
-        className={() =>
-          pathname === '/tags' ? 'nav-link active' : 'nav-link'
-        }>
-        <Icon name="tags-fill" className="me-2" />
-        <span>{t('header.nav.tag')}</span>
-      </NavLink>
+      </Nav>
 
-      <NavLink to="/users" className="nav-link">
-        <Icon name="people-fill" className="me-2" />
-        <span>{t('header.nav.user')}</span>
-      </NavLink>
+      <CampusSectionNav />
 
-      <NavLink to="/badges" className="nav-link">
-        <Icon name="award-fill" className="me-2" />
-        <span>{t('header.nav.badges')}</span>
-      </NavLink>
+      <Nav variant="pills" className="flex-column mt-3">
+        {ai_enabled && (
+          <NavLink
+            to="/ai-assistant"
+            className={() =>
+              pathname === '/ai-assistant' ? 'nav-link active' : 'nav-link'
+            }>
+            <Icon name="chat-square-text-fill" className="me-2" />
+            <span>{t('ai_assistant', { keyPrefix: 'page_title' })}</span>
+          </NavLink>
+        )}
 
-      <PluginRender
-        slug_name="quick_links"
-        type={PluginType.Sidebar}
-        request={request}
-        navigate={navigate}
-      />
+        <PluginRender
+          slug_name="quick_links"
+          type={PluginType.Sidebar}
+          request={request}
+          navigate={navigate}
+        />
+      </Nav>
 
       {can_revision || userInfo?.role_id === 2 ? (
-        <>
-          <div className="py-2 px-3 mt-3 small fw-bold">
+        <Nav
+          variant="pills"
+          className="side-nav-admin flex-column mt-auto pt-4">
+          <div className="px-3 pb-2 small fw-bold text-secondary">
             {t('header.nav.moderation')}
           </div>
           {can_revision && (
             <NavLink to="/review" className="nav-link">
               <Icon name="shield-fill-check" className="me-2" />
               <span>{t('header.nav.review')}</span>
-              <span className="float-end">
-                {revision > 99 ? '99+' : revision > 0 ? revision : ''}
-              </span>
+              {revision > 0 ? (
+                <span className="badge rounded-pill bg-danger float-end mt-1">
+                  {revision > 99 ? '99+' : revision}
+                </span>
+              ) : null}
             </NavLink>
           )}
 
@@ -106,9 +107,9 @@ const Index: FC = () => {
               <span>{t('header.nav.admin')}</span>
             </NavLink>
           ) : null}
-        </>
+        </Nav>
       ) : null}
-    </Nav>
+    </div>
   );
 };
 
diff --git a/ui/src/components/UserCard/index.tsx b/ui/src/components/UserCard/index.tsx
index cc7e883c6..f97e19015 100644
--- a/ui/src/components/UserCard/index.tsx
+++ b/ui/src/components/UserCard/index.tsx
@@ -23,7 +23,6 @@ import { Link } from 'react-router-dom';
 import classnames from 'classnames';
 
 import { Avatar, FormatTime } from '@/components';
-import { formatCount } from '@/utils';
 
 interface Props {
   data: any;
@@ -97,9 +96,6 @@ const Index: FC<Props> = ({
           ) : (
             <span className="me-1 text-break">{data?.display_name}</span>
           )}
-          <span className="fw-bold" title="Reputation">
-            {formatCount(data?.rank)}
-          </span>
         </div>
         {time &&
           (isLogged ? (
diff --git a/ui/src/components/index.ts b/ui/src/components/index.ts
index 5c81739bb..d24b9a794 100644
--- a/ui/src/components/index.ts
+++ b/ui/src/components/index.ts
@@ -68,6 +68,7 @@ import BubbleAi from './BubbleAi';
 import BubbleUser from './BubbleUser';
 import Sender from './Sender';
 import TabNav from './TabNav';
+import CampusSectionNav from './CampusSectionNav';
 
 export {
   Avatar,
@@ -123,5 +124,6 @@ export {
   BubbleUser,
   Sender,
   TabNav,
+  CampusSectionNav,
 };
 export type { EditorRef, JSONSchema, UISchema };
diff --git a/ui/src/index.scss b/ui/src/index.scss
index 78f54216c..3f9688976 100644
--- a/ui/src/index.scss
+++ b/ui/src/index.scss
@@ -80,14 +80,17 @@ img[src=''] {
   }
 }
 
-.unread-dot {
-  width: 18px;
+.unread-count {
+  min-width: 18px;
   height: 18px;
-  border-radius: 50%;
   position: absolute;
-  left: 15px;
-  top: 0;
+  left: 17px;
+  top: -4px;
+  padding: 0 5px;
   border: 1px solid #fff;
+  font-size: 0.625rem;
+  line-height: 16px;
+  text-align: center;
 }
 
 .badge-tag {
diff --git a/ui/src/pages/Admin/Users/components/Action/index.tsx b/ui/src/pages/Admin/Users/components/Action/index.tsx
index b55971f49..2733038c7 100644
--- a/ui/src/pages/Admin/Users/components/Action/index.tsx
+++ b/ui/src/pages/Admin/Users/components/Action/index.tsx
@@ -31,9 +31,11 @@ import {
 import {
   updateUserPassword,
   changeUserStatus,
+  changeUserRole,
   updateUserProfile,
 } from '@/services';
 import { toastStore } from '@/stores';
+import { RoleId } from '@/common/interface';
 
 interface Props {
   showActionPassword?: boolean;
@@ -142,6 +144,28 @@ const UserOperation = ({
       });
     }
 
+    if (type === 'make_admin') {
+      Modal.confirm({
+        title: t('make_admin.title'),
+        content: t('make_admin.content'),
+        cancelBtnVariant: 'link',
+        confirmBtnVariant: 'primary',
+        confirmText: t('make_admin.confirm'),
+        onConfirm: () => {
+          changeUserRole({
+            user_id,
+            role_id: RoleId.Admin,
+          }).then(() => {
+            Toast.onShow({
+              msg: t('make_admin.success'),
+              variant: 'success',
+            });
+            refreshUsers?.();
+          });
+        },
+      });
+    }
+
     if (type === 'password') {
       changePasswordModal.onShow(user_id);
     }
@@ -207,9 +231,17 @@ const UserOperation = ({
             {t('edit_profile')}
           </Dropdown.Item>
           {showActionRole ? (
-            <Dropdown.Item onClick={() => handleAction('role')}>
-              {t('change_role')}
-            </Dropdown.Item>
+            <>
+              {userData.role_id !== RoleId.Admin && (
+                <Dropdown.Item onClick={() => handleAction('make_admin')}>
+                  <Icon name="shield-check" className="me-2" />
+                  {t('make_admin.action')}
+                </Dropdown.Item>
+              )}
+              <Dropdown.Item onClick={() => handleAction('role')}>
+                {t('change_role')}
+              </Dropdown.Item>
+            </>
           ) : null}
           {userData.status === 'inactive' ? (
             <Dropdown.Item onClick={() => handleAction('activation')}>
diff --git a/ui/src/pages/Admin/Users/index.tsx b/ui/src/pages/Admin/Users/index.tsx
index 200aacf38..f35313b28 100644
--- a/ui/src/pages/Admin/Users/index.tsx
+++ b/ui/src/pages/Admin/Users/index.tsx
@@ -45,7 +45,6 @@ import {
   changeUserStatus,
   deletePermanently,
 } from '@/services';
-import { formatCount } from '@/utils';
 import { ADMIN_USERS_NAV_MENUS } from '@/common/constants';
 
 import DeleteUserModal from './components/DeleteUserModal';
@@ -251,7 +250,6 @@ const Users: FC = () => {
         <thead>
           <tr>
             <th>{t('name')}</th>
-            <th style={{ width: '12%' }}>{t('reputation')}</th>
             <th style={{ width: '15%' }} className="min-w-15">
               {t('email')}
             </th>
@@ -291,11 +289,9 @@ const Users: FC = () => {
                     avatarSize="32px"
                     avatarSearchStr="s=48"
                     avatarClass="me-2"
-                    showReputation={false}
                     nameMaxWidth="160px"
                   />
                 </td>
-                <td>{formatCount(user.rank)}</td>
                 <td className="text-break">{user.e_mail}</td>
                 <td>
                   <FormatTime time={user.created_at} />
diff --git a/ui/src/pages/Badges/Detail/components/UserCard/index.tsx b/ui/src/pages/Badges/Detail/components/UserCard/index.tsx
index 116a81b33..c0613050a 100644
--- a/ui/src/pages/Badges/Detail/components/UserCard/index.tsx
+++ b/ui/src/pages/Badges/Detail/components/UserCard/index.tsx
@@ -19,17 +19,14 @@
 
 import { memo, FC } from 'react';
 import { Link } from 'react-router-dom';
-import { useTranslation } from 'react-i18next';
 
 import { Avatar } from '@/components';
-import { formatCount } from '@/utils';
 
 interface Props {
   data: any;
 }
 
 const Index: FC<Props> = ({ data }) => {
-  const { t } = useTranslation('translation', { keyPrefix: 'badges' });
   return (
     <div className="d-flex">
       {data?.status !== 'deleted' ? (
@@ -80,10 +77,6 @@ const Index: FC<Props> = ({ data }) => {
         ) : (
           <span className="me-1 text-break">{data?.display_name}</span>
         )}
-        <div className="text-secondary">
-          {formatCount(data?.rank)}{' '}
-          {t('x_reputation', { keyPrefix: 'personal' })}
-        </div>
       </div>
     </div>
   );
diff --git a/ui/src/pages/Layout/index.tsx b/ui/src/pages/Layout/index.tsx
index 048ca812e..bc9811d86 100644
--- a/ui/src/pages/Layout/index.tsx
+++ b/ui/src/pages/Layout/index.tsx
@@ -39,9 +39,8 @@ import {
   PageTags,
   HttpErrorContent,
 } from '@/components';
-import { LoginToContinueModal, BadgeModal } from '@/components/Modal';
+import { LoginToContinueModal } from '@/components/Modal';
 import { changeTheme, Storage, scrollToElementTop } from '@/utils';
-import { useQueryNotificationStatus } from '@/services';
 import { useExternalToast } from '@/hooks';
 import { EXTERNAL_CONTENT_DISPLAY_MODE } from '@/common/constants';
 
@@ -57,7 +56,6 @@ const Layout: FC = () => {
   };
   const { code: httpStatusCode, reset: httpStatusReset } = errorCodeStore();
   const { show: showLoginToContinueModal } = loginToContinueStore();
-  const { data: notificationData } = useQueryNotificationStatus();
   const layout = themeSettingStore((state) => state.layout);
   useEffect(() => {
     // handle footnote links
@@ -225,10 +223,6 @@ const Layout: FC = () => {
         <Toast msg={toastMsg} variant={variant} onClose={closeToast} />
         <Customize />
         <LoginToContinueModal visible={showLoginToContinueModal} />
-        <BadgeModal
-          badge={notificationData?.badge_award}
-          visible={Boolean(notificationData?.badge_award)}
-        />
         <ScrollRestoration />
       </SWRConfig>
     </HelmetProvider>
diff --git a/ui/src/pages/Questions/Ask/index.tsx b/ui/src/pages/Questions/Ask/index.tsx
index ab680c495..ff66bf7c6 100644
--- a/ui/src/pages/Questions/Ask/index.tsx
+++ b/ui/src/pages/Questions/Ask/index.tsx
@@ -28,7 +28,7 @@ import isEqual from 'lodash/isEqual';
 import debounce from 'lodash/debounce';
 import fm from 'front-matter';
 
-import { writeSettingStore } from '@/stores';
+import { writeSettingStore, loggedUserInfoStore } from '@/stores';
 import { usePageTags, usePromptWithUnload } from '@/hooks';
 import { Editor, EditorRef, TagSelector } from '@/components';
 import type * as Type from '@/common/interface';
@@ -41,6 +41,7 @@ import {
   queryQuestionByTitle,
   getTagsBySlugName,
   saveQuestionWithAnswer,
+  useForumSections,
 } from '@/services';
 import {
   handleFormError,
@@ -54,6 +55,7 @@ import { useCaptchaPlugin } from '@/utils/pluginKit';
 import SearchQuestion from './components/SearchQuestion';
 
 interface FormDataItem {
+  section_id: Type.FormValue<number>;
   title: Type.FormValue<string>;
   tags: Type.FormValue<Type.Tag[]>;
   content: Type.FormValue<string>;
@@ -65,6 +67,11 @@ const saveDraft = new SaveDraft({ type: 'question' });
 
 const Ask = () => {
   const initFormData = {
+    section_id: {
+      value: 0,
+      isInvalid: false,
+      errorMsg: '',
+    },
     title: {
       value: '',
       isInvalid: false,
@@ -122,6 +129,8 @@ const Ask = () => {
     });
   };
   const writeInfo = writeSettingStore((state) => state.write);
+  const { user: loggedUser } = loggedUserInfoStore();
+  const { data: forumSections } = useForumSections();
 
   const isEdit = qid !== undefined;
 
@@ -161,6 +170,7 @@ const Ask = () => {
           formData.title.value = draft.title;
           formData.content.value = draft.content;
           formData.tags.value = draft.tags;
+          formData.section_id.value = draft.section_id || 0;
           formData.answer_content.value = draft.answer_content;
           setCheckState(Boolean(draft.answer_content));
           setHasDraft(true);
@@ -177,7 +187,7 @@ const Ask = () => {
   }, [qid]);
 
   useEffect(() => {
-    const { title, tags, content, answer_content } = formData;
+    const { title, tags, content, answer_content, section_id } = formData;
     const { title: editTitle, tags: editTags, content: editContent } = immData;
 
     // edited
@@ -199,6 +209,7 @@ const Ask = () => {
     // write
     if (
       title.value ||
+      section_id.value > 0 ||
       tags.value.length > 0 ||
       content.value ||
       answer_content.value
@@ -207,6 +218,7 @@ const Ask = () => {
       saveDraft.save({
         params: {
           title: title.value,
+          section_id: section_id.value,
           tags: tags.value,
           content: content.value,
           answer_content: answer_content.value,
@@ -240,6 +252,7 @@ const Ask = () => {
           original_text: '',
         };
       });
+      formData.section_id.value = res.section_id || 0;
       setImmData({ ...formData });
       setFormData({ ...formData });
     });
@@ -278,6 +291,16 @@ const Ask = () => {
       tags: { value, errorMsg: '', isInvalid: false },
     });
 
+  const handleSectionChange = (event: React.ChangeEvent<HTMLSelectElement>) =>
+    setFormData({
+      ...formData,
+      section_id: {
+        value: Number(event.currentTarget.value),
+        isInvalid: false,
+        errorMsg: '',
+      },
+    });
+
   const handleAnswerChange = (value: string) =>
     setFormData((prev) => ({
       ...prev,
@@ -383,11 +406,24 @@ const Ask = () => {
   const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
     event.stopPropagation();
+    if (!isEdit && formData.section_id.value <= 0) {
+      setFormData({
+        ...formData,
+        section_id: {
+          ...formData.section_id,
+          isInvalid: true,
+          errorMsg: t('form.fields.section.msg.empty'),
+        },
+      });
+      scrollToElementTop(document.getElementById('section_id'));
+      return;
+    }
 
     const params: Type.QuestionParams = {
       title: formData.title.value,
       content: formData.content.value,
       tags: formData.tags.value,
+      section_id: formData.section_id.value,
     };
 
     if (isEdit) {
@@ -468,6 +504,37 @@ const Ask = () => {
                 </Form.Select>
               </Form.Group>
             )}
+            {!isEdit && (
+              <Form.Group controlId="section_id" className="mb-3">
+                <Form.Label>{t('form.fields.section.label')}</Form.Label>
+                <Form.Select
+                  value={formData.section_id.value}
+                  isInvalid={formData.section_id.isInvalid}
+                  onChange={handleSectionChange}>
+                  <option value={0}>
+                    {t('form.fields.section.placeholder')}
+                  </option>
+                  {forumSections.map((parent) => (
+                    <optgroup key={parent.id} label={parent.name}>
+                      {parent.children
+                        .filter(
+                          (child) =>
+                            !child.admin_only || loggedUser.role_id === 2,
+                        )
+                        .map((child) => (
+                          <option key={child.id} value={child.id}>
+                            {child.name}
+                          </option>
+                        ))}
+                    </optgroup>
+                  ))}
+                </Form.Select>
+                <Form.Control.Feedback type="invalid">
+                  {formData.section_id.errorMsg}
+                </Form.Control.Feedback>
+                <Form.Text>{t('form.fields.section.hint')}</Form.Text>
+              </Form.Group>
+            )}
             <Form.Group controlId="title" className="mb-3">
               <Form.Label>{t('form.fields.title.label')}</Form.Label>
               <Form.Control
@@ -515,6 +582,7 @@ const Ask = () => {
                 showRequiredTag
                 maxTagLength={5}
                 isInvalid={formData.tags.isInvalid}
+                formText={t('form.fields.tags.hint')}
                 errMsg={formData.tags.errorMsg}
               />
             </Form.Group>
diff --git a/ui/src/pages/Questions/Detail/components/Answer/index.tsx b/ui/src/pages/Questions/Detail/components/Answer/index.tsx
index bd0ecbb5b..ba055e543 100644
--- a/ui/src/pages/Questions/Detail/components/Answer/index.tsx
+++ b/ui/src/pages/Questions/Detail/components/Answer/index.tsx
@@ -18,7 +18,7 @@
  */
 
 import { memo, FC, useEffect, useRef } from 'react';
-import { Button, Alert, Badge } from 'react-bootstrap';
+import { Alert } from 'react-bootstrap';
 import { useTranslation } from 'react-i18next';
 import { useSearchParams } from 'react-router-dom';
 
@@ -26,21 +26,18 @@ import {
   Actions,
   Operate,
   UserCard,
-  Icon,
   Comment,
   htmlRender,
   ImgViewer,
 } from '@/components';
 import { scrollToElementTop, bgFadeOut } from '@/utils';
 import { AnswerItem } from '@/common/interface';
-import { acceptanceAnswer } from '@/services';
 import { useRenderHtmlPlugin } from '@/utils/pluginKit';
 
 interface Props {
   data: AnswerItem;
   /** router answer id */
   aid?: string;
-  canAccept: boolean;
   questionTitle: string;
   isLogged: boolean;
   callback: (type: string) => void;
@@ -51,7 +48,6 @@ const Index: FC<Props> = ({
   isLogged,
   questionTitle = '',
   callback,
-  canAccept = false,
 }) => {
   const { t } = useTranslation('translation', {
     keyPrefix: 'question_detail',
@@ -61,15 +57,6 @@ const Index: FC<Props> = ({
 
   useRenderHtmlPlugin(answerRef.current?.querySelector('.fmt') as HTMLElement);
 
-  const acceptAnswer = () => {
-    acceptanceAnswer({
-      question_id: data.question_id,
-      answer_id: data.accepted === 2 ? '0' : data.id,
-    }).then(() => {
-      callback?.('');
-    });
-  };
-
   useEffect(() => {
     if (!answerRef?.current) {
       return;
@@ -120,15 +107,6 @@ const Index: FC<Props> = ({
             timelinePath={`/posts/${data.question_id}/${data.id}/timeline`}
           />
         </div>
-
-        {data?.accepted === 2 && (
-          <div className="lh-1">
-            <Badge bg="success" pill>
-              <Icon name="check-circle-fill me-1" />
-              Best answer
-            </Badge>
-          </div>
-        )}
       </div>
       <ImgViewer>
         <article
@@ -150,20 +128,6 @@ const Index: FC<Props> = ({
             username: data?.user_info?.username,
           }}
         />
-
-        {canAccept && (
-          <Button
-            variant={data.accepted === 2 ? 'success' : 'outline-success'}
-            className="ms-3"
-            onClick={acceptAnswer}>
-            <Icon name="check-circle-fill" className="me-2" />
-            <span>
-              {data.accepted === 2
-                ? t('answers.btn_accepted')
-                : t('answers.btn_accept')}
-            </span>
-          </Button>
-        )}
       </div>
 
       <Comment
diff --git a/ui/src/pages/Questions/Detail/components/LinkedQuestions/index.tsx b/ui/src/pages/Questions/Detail/components/LinkedQuestions/index.tsx
index 42a0c94ee..a8965dac9 100644
--- a/ui/src/pages/Questions/Detail/components/LinkedQuestions/index.tsx
+++ b/ui/src/pages/Questions/Detail/components/LinkedQuestions/index.tsx
@@ -66,20 +66,8 @@ const Index: FC<Props> = ({ id }) => {
             to={pathFactory.questionLanding(item.id, item.url_title)}>
             <div className="link-dark text-truncate-3">{item.title}</div>
             {item.answer_count > 0 && (
-              <div
-                className={`mt-1 small me-2 ${
-                  item.accepted_answer_id > 0
-                    ? 'link-success'
-                    : 'link-secondary'
-                }`}>
-                <Icon
-                  name={
-                    item.accepted_answer_id > 0
-                      ? 'check-circle-fill'
-                      : 'chat-square-text-fill'
-                  }
-                  className="me-1"
-                />
+              <div className="mt-1 small me-2 link-secondary">
+                <Icon name="chat-square-text-fill" className="me-1" />
                 <span>
                   {item.answer_count} {t2('answers')}
                 </span>
diff --git a/ui/src/pages/Questions/Detail/components/RelatedQuestions/index.tsx b/ui/src/pages/Questions/Detail/components/RelatedQuestions/index.tsx
index 19bf269dc..efde66c16 100644
--- a/ui/src/pages/Questions/Detail/components/RelatedQuestions/index.tsx
+++ b/ui/src/pages/Questions/Detail/components/RelatedQuestions/index.tsx
@@ -60,21 +60,8 @@ const Index: FC<Props> = ({ id }) => {
               to={pathFactory.questionLanding(item.id, item.url_title)}>
               <div className="link-dark text-truncate-3">{item.title}</div>
               {item.answer_count > 0 && (
-                <div
-                  className={`mt-1 small me-2 ${
-                    item.accepted_answer_id > 0
-                      ? 'link-success'
-                      : 'link-secondary'
-                  }`}>
-                  <Icon
-                    name={
-                      item.accepted_answer_id > 0
-                        ? 'check-circle-fill'
-                        : 'chat-square-text-fill'
-                    }
-                    className="me-1"
-                  />
-
+                <div className="mt-1 small me-2 link-secondary">
+                  <Icon name="chat-square-text-fill" className="me-1" />
                   <span>
                     {item.answer_count} {t('answers')}
                   </span>
diff --git a/ui/src/pages/Questions/Detail/components/WriteAnswer/index.tsx b/ui/src/pages/Questions/Detail/components/WriteAnswer/index.tsx
index 5627231dc..8b8164d3a 100644
--- a/ui/src/pages/Questions/Detail/components/WriteAnswer/index.tsx
+++ b/ui/src/pages/Questions/Detail/components/WriteAnswer/index.tsx
@@ -18,8 +18,8 @@
  */
 
 import { memo, useState, FC, useEffect } from 'react';
-import { Form, Button, Alert } from 'react-bootstrap';
-import { useTranslation, Trans } from 'react-i18next';
+import { Form, Button } from 'react-bootstrap';
+import { useTranslation } from 'react-i18next';
 import { Link } from 'react-router-dom';
 
 import { marked } from 'marked';
@@ -40,7 +40,6 @@ interface Props {
     /** question  id */
     qid: string;
     answered?: boolean;
-    loggedUserRank: number;
     first_answer_id?: string;
   };
   callback?: (obj) => void;
@@ -63,7 +62,6 @@ const Index: FC<Props> = ({ visible = false, data, callback }) => {
   const [focusType, setFocusType] = useState('');
   const [editorFocusState, setEditorFocusState] = useState(false);
   const [hasDraft, setHasDraft] = useState(false);
-  const [showTips, setShowTips] = useState(data.loggedUserRank < 100);
   const aCaptcha = useCaptchaPlugin('answer');
   const writeInfo = writeSettingStore((state) => state.write);
   const [editorCanSave, setEditorCanSave] = useState(false);
@@ -261,61 +259,32 @@ const Index: FC<Props> = ({ visible = false, data, callback }) => {
             </div>
           )}
           {showEditor && (
-            <>
-              <Editor
-                className={classNames(
-                  'form-control p-0',
-                  focusType === 'answer' && 'focus',
-                  formData.content.isInvalid && 'is-invalid',
-                )}
-                value={formData.content.value}
-                autoFocus={editorFocusState}
-                onChange={(val) => {
-                  if (editorCanSave) {
-                    setFormData({
-                      content: {
-                        value: val,
-                        isInvalid: false,
-                        errorMsg: '',
-                      },
-                    });
-                  }
-                }}
-                onFocus={() => {
-                  setFocusType('answer');
-                }}
-                onBlur={() => {
-                  setFocusType('');
-                }}
-              />
-
-              <Alert
-                variant="warning"
-                show={data.loggedUserRank < 100 && showTips}
-                onClose={() => setShowTips(false)}
-                dismissible
-                className="mt-3">
-                <p>{t('tips.header_1')}</p>
-                <ul>
-                  <li>
-                    <Trans
-                      i18nKey="question_detail.write_answer.tips.li1_1"
-                      components={{ strong: <strong /> }}
-                    />
-                  </li>
-                  <li>{t('tips.li1_2')}</li>
-                </ul>
-                <p>
-                  <Trans
-                    i18nKey="question_detail.write_answer.tips.header_2"
-                    components={{ strong: <strong /> }}
-                  />
-                </p>
-                <ul className="mb-0">
-                  <li>{t('tips.li2_1')}</li>
-                </ul>
-              </Alert>
-            </>
+            <Editor
+              className={classNames(
+                'form-control p-0',
+                focusType === 'answer' && 'focus',
+                formData.content.isInvalid && 'is-invalid',
+              )}
+              value={formData.content.value}
+              autoFocus={editorFocusState}
+              onChange={(val) => {
+                if (editorCanSave) {
+                  setFormData({
+                    content: {
+                      value: val,
+                      isInvalid: false,
+                      errorMsg: '',
+                    },
+                  });
+                }
+              }}
+              onFocus={() => {
+                setFocusType('answer');
+              }}
+              onBlur={() => {
+                setFocusType('');
+              }}
+            />
           )}
 
           <Form.Control.Feedback type="invalid">
diff --git a/ui/src/pages/Questions/Detail/components/index.tsx b/ui/src/pages/Questions/Detail/components/index.tsx
index ee6657908..484b741a0 100644
--- a/ui/src/pages/Questions/Detail/components/index.tsx
+++ b/ui/src/pages/Questions/Detail/components/index.tsx
@@ -24,7 +24,6 @@ import RelatedQuestions from './RelatedQuestions';
 import WriteAnswer from './WriteAnswer';
 import Alert from './Alert';
 import ContentLoader from './ContentLoader';
-import InviteToAnswer from './InviteToAnswer';
 import LinkedQuestions from './LinkedQuestions';
 
 export {
@@ -35,6 +34,5 @@ export {
   WriteAnswer,
   Alert,
   ContentLoader,
-  InviteToAnswer,
   LinkedQuestions,
 };
diff --git a/ui/src/pages/Questions/Detail/index.tsx b/ui/src/pages/Questions/Detail/index.tsx
index 8c8921b88..dee21f561 100644
--- a/ui/src/pages/Questions/Detail/index.tsx
+++ b/ui/src/pages/Questions/Detail/index.tsx
@@ -46,7 +46,6 @@ import {
   WriteAnswer,
   Alert,
   ContentLoader,
-  InviteToAnswer,
   LinkedQuestions,
 } from './components';
 
@@ -76,11 +75,8 @@ const Index = () => {
   });
   const { setUsers } = usePageUsers();
   const userInfo = loggedUserInfoStore((state) => state.user);
-  const isAuthor = userInfo?.username === question?.user_info?.username;
   const isAdmin = userInfo?.role_id === 2;
-  const isModerator = userInfo?.role_id === 3;
   const isLogged = Boolean(userInfo?.access_token);
-  const loggedUserRank = userInfo?.rank;
   const location = useLocation();
 
   useEffect(() => {
@@ -230,17 +226,7 @@ const Index = () => {
     keywords: question?.tags.map((_) => _.slug_name).join(','),
   });
 
-  const showInviteToAnswer = question?.id;
   const showLinkedQuestions = question?.id && question.id !== '';
-  let canInvitePeople = false;
-  if (showInviteToAnswer && Array.isArray(question.extends_actions)) {
-    const inviteAct = question.extends_actions.find((op) => {
-      return op.action === 'invite_other_to_answer';
-    });
-    if (inviteAct) {
-      canInvitePeople = true;
-    }
-  }
 
   return (
     <Row className="questionDetailPage pt-4 mb-5">
@@ -266,7 +252,6 @@ const Index = () => {
                   key={item?.id}
                   data={item}
                   questionTitle={question?.title || ''}
-                  canAccept={isAuthor || isAdmin || isModerator}
                   callback={initPage}
                   isLogged={isLogged}
                 />
@@ -292,7 +277,6 @@ const Index = () => {
               data={{
                 qid,
                 answered: question?.answered,
-                loggedUserRank,
                 first_answer_id: question?.first_answer_id,
               }}
               callback={writeAnswerCallback}
@@ -301,12 +285,6 @@ const Index = () => {
       </Col>
       <Col className="page-right-side mt-4 mt-xl-0">
         <CustomSidebar />
-        {showInviteToAnswer ? (
-          <InviteToAnswer
-            questionId={question.id}
-            readOnly={!canInvitePeople}
-          />
-        ) : null}
         {showLinkedQuestions ? <LinkedQuestions id={question.id} /> : null}
         <RelatedQuestions id={question?.id || ''} />
       </Col>
diff --git a/ui/src/pages/Questions/index.tsx b/ui/src/pages/Questions/index.tsx
index 7239feb66..c7a5d4cdd 100644
--- a/ui/src/pages/Questions/index.tsx
+++ b/ui/src/pages/Questions/index.tsx
@@ -28,34 +28,44 @@ import {
   QuestionList,
   HotQuestions,
   CustomSidebar,
+  CampusSectionNav,
 } from '@/components';
 import {
   siteInfoStore,
   loggedUserInfoStore,
   loginSettingStore,
 } from '@/stores';
-import { useQuestionList, useQuestionRecommendList } from '@/services';
+import { useQuestionList } from '@/services';
 import * as Type from '@/common/interface';
 import { userCenter, floppyNavigation } from '@/utils';
-import { QUESTION_ORDER_KEYS } from '@/components/QuestionList';
+
+const CAMPUS_QUESTION_ORDER_KEYS: Type.QuestionOrderBy[] = [
+  'active',
+  'newest',
+  'score',
+];
 
 const Questions: FC = () => {
   const { t } = useTranslation('translation', { keyPrefix: 'question' });
   const { t: t2 } = useTranslation('translation');
+  const { t: tCampus } = useTranslation('translation', {
+    keyPrefix: 'campus_forum',
+  });
   const { user: loggedUser } = loggedUserInfoStore((_) => _);
   const [urlSearchParams] = useSearchParams();
   const curPage = Number(urlSearchParams.get('page')) || 1;
-  const curOrder = (urlSearchParams.get('order') ||
-    QUESTION_ORDER_KEYS[0]) as Type.QuestionOrderBy;
+  const requestedOrder = urlSearchParams.get('order') as Type.QuestionOrderBy;
+  const curOrder = CAMPUS_QUESTION_ORDER_KEYS.includes(requestedOrder)
+    ? requestedOrder
+    : CAMPUS_QUESTION_ORDER_KEYS[0];
   const reqParams: Type.QueryQuestionsReq = {
     page_size: 20,
     page: curPage,
     order: curOrder as Type.QuestionOrderBy,
+    in_days: 30,
+    section: urlSearchParams.get('section') || undefined,
   };
-  const { data: listData, isLoading: listLoading } =
-    curOrder === 'recommend'
-      ? useQuestionRecommendList(reqParams)
-      : useQuestionList(reqParams);
+  const { data: listData, isLoading: listLoading } = useQuestionList(reqParams);
   const isIndexPage = useMatch('/');
   let pageTitle = t('questions', { keyPrefix: 'page_title' });
   let slogan = '';
@@ -70,15 +80,15 @@ const Questions: FC = () => {
   return (
     <Row className="pt-4 mb-5">
       <Col className="page-main flex-auto overflow-x-hidden">
+        <CampusSectionNav mobile />
+        <div className="small text-secondary mb-2">
+          {tCampus('last_30_days')}
+        </div>
         <QuestionList
           source="questions"
           data={listData}
           order={curOrder}
-          orderList={
-            loggedUser.username
-              ? QUESTION_ORDER_KEYS
-              : QUESTION_ORDER_KEYS.filter((key) => key !== 'recommend')
-          }
+          orderList={CAMPUS_QUESTION_ORDER_KEYS}
           isLoading={listLoading}
         />
       </Col>
diff --git a/ui/src/pages/Search/components/SearchItem/index.tsx b/ui/src/pages/Search/components/SearchItem/index.tsx
index 163917716..fdff250fa 100644
--- a/ui/src/pages/Search/components/SearchItem/index.tsx
+++ b/ui/src/pages/Search/components/SearchItem/index.tsx
@@ -84,6 +84,7 @@ const Index: FC<Props> = ({ data }) => {
         <FormatTime time={data.object?.created_at} className="me-3" />
 
         <Counts
+          answersLabel="comments"
           className="my-2 my-sm-0"
           showViews={false}
           isAccepted={data.object?.accepted}
diff --git a/ui/src/pages/Timeline/components/Item/index.tsx b/ui/src/pages/Timeline/components/Item/index.tsx
index e327ed320..db5575879 100644
--- a/ui/src/pages/Timeline/components/Item/index.tsx
+++ b/ui/src/pages/Timeline/components/Item/index.tsx
@@ -130,7 +130,6 @@ const Index: FC<Props> = ({ data, isAdmin, objectInfo, revisionList }) => {
               className="fs-normal"
               data={data?.user_info}
               showAvatar={false}
-              showReputation={false}
             />
           )}
         </td>
diff --git a/ui/src/pages/Users/Logout/index.tsx b/ui/src/pages/Users/Logout/index.tsx
index 5561c16f8..3e7b580ec 100644
--- a/ui/src/pages/Users/Logout/index.tsx
+++ b/ui/src/pages/Users/Logout/index.tsx
@@ -40,10 +40,8 @@ const Index = () => {
     if (loggedUserInfo.username) {
       logout().then(() => {
         clearUserStore();
-        const redirect =
-          Storage.get(REDIRECT_PATH_STORAGE_KEY) || RouteAlias.home;
         Storage.remove(REDIRECT_PATH_STORAGE_KEY);
-        window.location.replace(`${BASE_ORIGIN}${redirect}`);
+        window.location.replace(`${BASE_ORIGIN}${RouteAlias.home}`);
       });
     }
     // auto height of container
diff --git a/ui/src/pages/Users/Notifications/components/Achievements/index.tsx b/ui/src/pages/Users/Notifications/components/Achievements/index.tsx
index 824bb1788..59f23cb24 100644
--- a/ui/src/pages/Users/Notifications/components/Achievements/index.tsx
+++ b/ui/src/pages/Users/Notifications/components/Achievements/index.tsx
@@ -70,19 +70,7 @@ const Achievements = ({ data, handleReadNotification }) => {
             )}>
             {item.object_info.object_type === 'badge_award' ? (
               <div className="icon text-end">👏</div>
-            ) : (
-              <>
-                {item.rank > 0 && (
-                  <div className="text-success num text-end">{`+${item.rank}`}</div>
-                )}
-                {item.rank === 0 && (
-                  <div className="num text-end">{item.rank}</div>
-                )}
-                {item.rank < 0 && (
-                  <div className="text-danger num text-end">{`${item.rank}`}</div>
-                )}
-              </>
-            )}
+            ) : null}
 
             <div className="d-flex flex-column ms-3 flex-fill">
               <Link to={url} onClick={() => handleReadNotification(item.id)}>
diff --git a/ui/src/pages/Users/Personal/components/Answers/index.tsx b/ui/src/pages/Users/Personal/components/Answers/index.tsx
index 055d56353..2a1cb07c1 100644
--- a/ui/src/pages/Users/Personal/components/Answers/index.tsx
+++ b/ui/src/pages/Users/Personal/components/Answers/index.tsx
@@ -32,9 +32,12 @@ const Index: FC<Props> = ({ visible, data }) => {
   if (!visible || !data?.length) {
     return null;
   }
+  const visibleData = data.filter(
+    (item) => item.answer_id && item.question_id && item.question_info?.title,
+  );
   return (
     <ListGroup className="rounded-0">
-      {data.map((item) => {
+      {visibleData.map((item) => {
         return (
           <ListGroupItem
             className="py-3 px-0 bg-transparent border-start-0 border-end-0"
@@ -57,7 +60,6 @@ const Index: FC<Props> = ({ visible, data }) => {
                 data={{ votes: item?.vote_count, views: 0, answers: 0 }}
                 showAnswers={false}
                 showViews={false}
-                showAccepted={item.accepted === 2}
               />
             </div>
             <div>
diff --git a/ui/src/pages/Users/Personal/components/Comments/index.tsx b/ui/src/pages/Users/Personal/components/Comments/index.tsx
index 504535521..c2d47089e 100644
--- a/ui/src/pages/Users/Personal/components/Comments/index.tsx
+++ b/ui/src/pages/Users/Personal/components/Comments/index.tsx
@@ -33,9 +33,16 @@ const Index: FC<Props> = ({ visible, data }) => {
   if (!visible || !data?.length) {
     return null;
   }
+  const visibleData = data.filter(
+    (item) =>
+      item.title &&
+      item.question_id &&
+      (item.object_type === 'question' ||
+        (item.object_type === 'answer' && item.answer_id)),
+  );
   return (
     <ListGroup className="rounded-0">
-      {data.map((item) => {
+      {visibleData.map((item) => {
         return (
           <ListGroupItem
             className="py-3 px-0 bg-transparent border-start-0 border-end-0"
diff --git a/ui/src/pages/Users/Personal/components/DefaultList/index.tsx b/ui/src/pages/Users/Personal/components/DefaultList/index.tsx
index 6de0b8ca3..a2647382a 100644
--- a/ui/src/pages/Users/Personal/components/DefaultList/index.tsx
+++ b/ui/src/pages/Users/Personal/components/DefaultList/index.tsx
@@ -36,23 +36,27 @@ const Index: FC<Props> = ({ visible, tabName, data }) => {
   if (!visible) {
     return null;
   }
+  const visibleData = data.filter((item) => {
+    const id = tabName === 'posts' ? item.question_id : item.id;
+    return id && item.title;
+  });
 
   return (
     <ListGroup className="rounded-0">
-      {data.map((item) => {
+      {visibleData.map((item) => {
         return (
           <ListGroupItem
             className="py-3 px-0 bg-transparent border-start-0 border-end-0"
-            key={tabName === 'questions' ? item.question_id : item.id}>
+            key={tabName === 'posts' ? item.question_id : item.id}>
             <h6 className="mb-2">
               <Link
                 className="text-break"
                 to={pathFactory.questionLanding(
-                  tabName === 'questions' ? item.question_id : item.id,
+                  tabName === 'posts' ? item.question_id : item.id,
                   item.url_title,
                 )}>
                 {item.title}
-                {tabName === 'questions' && item.status === 'closed'
+                {tabName === 'posts' && item.status === 'closed'
                   ? ` [${t('closed', { keyPrefix: 'question' })}]`
                   : null}
               </Link>
@@ -73,7 +77,7 @@ const Index: FC<Props> = ({ visible, tabName, data }) => {
               />
 
               <Counts
-                isAccepted={Number(item.accepted_answer_id) > 0}
+                answersLabel="comments"
                 data={{
                   votes: item.vote_count,
                   answers: item.answer_count,
diff --git a/ui/src/pages/Users/Personal/components/ListHead/index.tsx b/ui/src/pages/Users/Personal/components/ListHead/index.tsx
index 8a8a6174e..bf2a0c70c 100644
--- a/ui/src/pages/Users/Personal/components/ListHead/index.tsx
+++ b/ui/src/pages/Users/Personal/components/ListHead/index.tsx
@@ -31,7 +31,7 @@ interface Props {
   visible: boolean;
 }
 const Index: FC<Props> = ({
-  tabName = 'answers',
+  tabName = 'comments',
   visible,
   sort,
   count = 0,
@@ -47,7 +47,7 @@ const Index: FC<Props> = ({
       <h5 className="mb-0">
         {count} {t(tabName)}
       </h5>
-      {(tabName === 'answers' || tabName === 'questions') && (
+      {(tabName === 'comments' || tabName === 'posts') && (
         <QueryGroup
           data={sortBtns}
           currentSort={sort}
diff --git a/ui/src/pages/Users/Personal/components/NavBar/index.tsx b/ui/src/pages/Users/Personal/components/NavBar/index.tsx
index 9c6d157a4..91500fe5e 100644
--- a/ui/src/pages/Users/Personal/components/NavBar/index.tsx
+++ b/ui/src/pages/Users/Personal/components/NavBar/index.tsx
@@ -34,12 +34,12 @@ const list = [
     name: 'overview',
   },
   {
-    path: '/answers',
-    name: 'answers',
+    path: '/comments',
+    name: 'comments',
   },
   {
-    path: '/questions',
-    name: 'questions',
+    path: '/posts',
+    name: 'posts',
   },
   {
     role: 'self', // Only visible to author
@@ -47,22 +47,14 @@ const list = [
     name: 'bookmarks',
   },
   {
-    path: '/reputation',
-    name: 'reputation',
-  },
-  {
-    path: '/comments',
-    name: 'comments',
+    path: '/replies',
+    name: 'replies',
   },
   {
     role: 'self', // Only visible to author
     path: '/votes',
     name: 'votes',
   },
-  {
-    path: '/badges',
-    name: 'badges',
-  },
 ];
 const Index: FC<Props> = ({ slug, tabName = 'overview', isSelf }) => {
   const { t } = useTranslation('translation', { keyPrefix: 'personal' });
diff --git a/ui/src/pages/Users/Personal/components/Overview/index.tsx b/ui/src/pages/Users/Personal/components/Overview/index.tsx
index 60d502e9e..1e96995e2 100644
--- a/ui/src/pages/Users/Personal/components/Overview/index.tsx
+++ b/ui/src/pages/Users/Personal/components/Overview/index.tsx
@@ -21,22 +21,15 @@ import { FC, memo } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Row, Col } from 'react-bootstrap';
 
-// import * as Type from '@/common/interface';
-import { CardBadge } from '@/components';
-import { useGetRecentAwardBadges } from '@/services';
 import TopList from '../TopList';
 
 interface Props {
-  username: string;
   visible: boolean;
   introduction: string;
   data;
 }
-const Index: FC<Props> = ({ visible, introduction, data, username }) => {
+const Index: FC<Props> = ({ visible, introduction, data }) => {
   const { t } = useTranslation('translation', { keyPrefix: 'personal' });
-  const { data: recentBadges } = useGetRecentAwardBadges(
-    visible ? username : null,
-  );
   if (!visible) {
     return null;
   }
@@ -54,43 +47,22 @@ const Index: FC<Props> = ({ visible, introduction, data, username }) => {
 
       <Row className="mb-4">
         <Col sm={12} md={6} className="mb-4">
-          <h5 className="mb-3">{t('top_answers')}</h5>
-          {data?.answer?.length > 0 ? (
-            <TopList data={data?.answer} type="answer" />
+          <h5 className="mb-3">{t('top_comments')}</h5>
+          {data?.comments?.length > 0 ? (
+            <TopList data={data.comments} type="comment" />
           ) : (
             <div className="mb-5">{t('content_empty')}</div>
           )}
         </Col>
         <Col sm={12} md={6}>
-          <h5 className="mb-3">{t('top_questions')}</h5>
-          {data?.question?.length > 0 ? (
-            <TopList data={data?.question} type="question" />
+          <h5 className="mb-3">{t('top_posts')}</h5>
+          {data?.posts?.length > 0 ? (
+            <TopList data={data.posts} type="post" />
           ) : (
             <div className="mb-5">{t('content_empty')}</div>
           )}
         </Col>
       </Row>
-
-      <div className="mb-4">
-        <h5 className="mb-3">{t('recent_badges')}</h5>
-        {Number(recentBadges?.count) > 0 ? (
-          <Row>
-            {recentBadges?.list?.map((item) => {
-              return (
-                <Col sm={6} md={4} lg={3} key={item.id} className="mb-4">
-                  <CardBadge
-                    data={item}
-                    urlSearchParams={`username=${username}`}
-                    badgePillType="count"
-                  />
-                </Col>
-              );
-            })}
-          </Row>
-        ) : (
-          <div className="mb-5">{t('content_empty')}</div>
-        )}
-      </div>
     </div>
   );
 };
diff --git a/ui/src/pages/Users/Personal/components/TopList/index.tsx b/ui/src/pages/Users/Personal/components/TopList/index.tsx
index aa896caf1..eda6ecf10 100644
--- a/ui/src/pages/Users/Personal/components/TopList/index.tsx
+++ b/ui/src/pages/Users/Personal/components/TopList/index.tsx
@@ -26,21 +26,26 @@ import { Icon } from '@/components';
 
 interface Props {
   data: any[];
-  type: 'answer' | 'question';
+  type: 'comment' | 'post';
 }
 const Index: FC<Props> = ({ data, type }) => {
   const { t } = useTranslation('translation', { keyPrefix: 'personal' });
+  const visibleData = data.filter((item) =>
+    type === 'comment'
+      ? item.answer_id && item.question_id && item.question_info?.title
+      : item.question_id && item.title,
+  );
   return (
     <ol className="list-unstyled">
-      {data?.map((item, index) => {
+      {visibleData.map((item, index) => {
         return (
           <li
-            className={`${index === data.length - 1 ? '' : 'mb-2'}`}
-            key={type === 'answer' ? item.answer_id : item.question_id}>
+            className={`${index === visibleData.length - 1 ? '' : 'mb-2'}`}
+            key={type === 'comment' ? item.answer_id : item.question_id}>
             <Link
               className="text-truncate-1"
               to={
-                type === 'answer'
+                type === 'comment'
                   ? pathFactory.answerLanding({
                       questionId: item.question_id,
                       slugTitle: item.question_info?.url_title,
@@ -51,7 +56,7 @@ const Index: FC<Props> = ({ data, type }) => {
                       item.url_title,
                     )
               }>
-              {type === 'answer' ? item.question_info.title : item.title}
+              {type === 'comment' ? item.question_info.title : item.title}
             </Link>
 
             <div className="text-secondary small">
@@ -60,30 +65,16 @@ const Index: FC<Props> = ({ data, type }) => {
                 {item.vote_count} {t('votes', { keyPrefix: 'counts' })}
               </span>
 
-              {type === 'question' && (
-                <div
-                  className={`d-inline-block text-secondary ms-3 small ${
-                    Number(item.accepted_answer_id) > 0 ? 'text-success' : ''
-                  }`}>
-                  {Number(item.accepted_answer_id) > 0 ? (
-                    <Icon name="check-circle-fill" />
-                  ) : (
-                    <Icon name="chat-square-text-fill" />
-                  )}
+              {type === 'post' && (
+                <div className="d-inline-block text-secondary ms-3 small">
+                  <Icon name="chat-square-text-fill" />
 
                   <span>
                     {' '}
-                    {item.answer_count} {t('answers', { keyPrefix: 'counts' })}
+                    {item.answer_count} {t('comments')}
                   </span>
                 </div>
               )}
-
-              {type === 'answer' && item.accepted === 2 && (
-                <div className="d-inline-block text-success ms-3 small">
-                  <Icon name="check-circle-fill" />
-                  <span> {t('accepted')}</span>
-                </div>
-              )}
             </div>
           </li>
         );
diff --git a/ui/src/pages/Users/Personal/components/UserInfo/index.tsx b/ui/src/pages/Users/Personal/components/UserInfo/index.tsx
index 07cc20b0e..7d22d6de7 100644
--- a/ui/src/pages/Users/Personal/components/UserInfo/index.tsx
+++ b/ui/src/pages/Users/Personal/components/UserInfo/index.tsx
@@ -100,16 +100,16 @@ const Index: FC<Props> = ({ data }) => {
 
         <div className="d-flex flex-wrap mb-3">
           <div className="me-3">
-            <strong className="fs-5">{data.rank || 0}</strong>
-            <span className="text-secondary"> {t('x_reputation')}</span>
-          </div>
-          <div className="me-3">
-            <strong className="fs-5">{data.answer_count || 0}</strong>
-            <span className="text-secondary"> {t('x_answers')}</span>
+            <strong className="fs-5">
+              {data.comment_count ?? data.answer_count ?? 0}
+            </strong>
+            <span className="text-secondary"> {t('x_comments')}</span>
           </div>
           <div>
-            <strong className="fs-5">{data?.question_count || 0}</strong>
-            <span className="text-secondary"> {t('x_questions')}</span>
+            <strong className="fs-5">
+              {data.post_count ?? data.question_count ?? 0}
+            </strong>
+            <span className="text-secondary"> {t('x_posts')}</span>
           </div>
         </div>
 
diff --git a/ui/src/pages/Users/Personal/components/Votes/index.tsx b/ui/src/pages/Users/Personal/components/Votes/index.tsx
index 581cc39f6..65c7e4449 100644
--- a/ui/src/pages/Users/Personal/components/Votes/index.tsx
+++ b/ui/src/pages/Users/Personal/components/Votes/index.tsx
@@ -20,6 +20,7 @@
 import { FC, memo } from 'react';
 import { ListGroup, ListGroupItem } from 'react-bootstrap';
 import { Link } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
 
 import { pathFactory } from '@/router/pathFactory';
 import { FormatTime } from '@/components';
@@ -30,13 +31,21 @@ interface Props {
 }
 
 const Index: FC<Props> = ({ visible, data }) => {
+  const { t } = useTranslation('translation', { keyPrefix: 'personal' });
   if (!visible || !data?.length) {
     return null;
   }
+  const visibleData = data.filter(
+    (item) =>
+      item.title &&
+      item.question_id &&
+      (item.object_type === 'question' ||
+        (item.object_type === 'answer' && item.answer_id)),
+  );
 
   return (
     <ListGroup className="rounded-0">
-      {data.map((item) => {
+      {visibleData.map((item) => {
         return (
           <ListGroupItem
             className="d-flex py-3 px-0 bg-transparent border-start-0 border-end-0"
@@ -64,7 +73,9 @@ const Index: FC<Props> = ({ visible, data }) => {
                 {item.title}
               </Link>
               <div className="d-flex align-items-center small text-secondary">
-                <span>{item.object_type}</span>
+                <span>
+                  {t(item.object_type === 'question' ? 'post' : 'comment')}
+                </span>
 
                 <span className="split-dot" />
                 <FormatTime time={item.created_at} className="me-4" />
diff --git a/ui/src/pages/Users/Personal/components/index.ts b/ui/src/pages/Users/Personal/components/index.ts
index 0a9baab1f..902430c0f 100644
--- a/ui/src/pages/Users/Personal/components/index.ts
+++ b/ui/src/pages/Users/Personal/components/index.ts
@@ -24,11 +24,9 @@ import TopList from './TopList';
 import Alert from './Alert';
 import ListHead from './ListHead';
 import DefaultList from './DefaultList';
-import Reputation from './Reputation';
-import Comments from './Comments';
+import Comments from './Answers';
+import Replies from './Comments';
 import Votes from './Votes';
-import Answers from './Answers';
-import Badges from './Badges';
 
 export {
   Alert,
@@ -38,9 +36,7 @@ export {
   TopList,
   ListHead,
   DefaultList,
-  Reputation,
   Comments,
+  Replies,
   Votes,
-  Answers,
-  Badges,
 };
diff --git a/ui/src/pages/Users/Personal/index.tsx b/ui/src/pages/Users/Personal/index.tsx
index e9516acee..ec3932423 100644
--- a/ui/src/pages/Users/Personal/index.tsx
+++ b/ui/src/pages/Users/Personal/index.tsx
@@ -20,7 +20,7 @@
 import { FC } from 'react';
 import { Row, Col } from 'react-bootstrap';
 import { useTranslation } from 'react-i18next';
-import { useParams, useSearchParams, Link } from 'react-router-dom';
+import { useParams, useSearchParams, Link, Navigate } from 'react-router-dom';
 
 import { usePageTags } from '@/hooks';
 import { Pagination, FormatTime, Empty } from '@/components';
@@ -39,15 +39,21 @@ import {
   Alert,
   ListHead,
   DefaultList,
-  Reputation,
   Comments,
-  Answers,
+  Replies,
   Votes,
-  Badges,
 } from './components';
 
 const Personal: FC = () => {
-  const { tabName = 'overview', username = '' } = useParams();
+  const { tabName: routeTabName = 'overview', username = '' } = useParams();
+  const legacyTabMap: Record<string, string> = {
+    answers: 'comments',
+    questions: 'posts',
+  };
+  const tabName =
+    routeTabName === 'reputation' || routeTabName === 'badges'
+      ? 'overview'
+      : legacyTabMap[routeTabName] || routeTabName;
   const [searchParams] = useSearchParams();
   const page = searchParams.get('page') || 1;
   const order = searchParams.get('order') || 'newest';
@@ -77,6 +83,12 @@ const Personal: FC = () => {
     title: pageTitle,
   });
 
+  if (legacyTabMap[routeTabName]) {
+    const query = searchParams.toString();
+    const target = `/users/${username}/${legacyTabMap[routeTabName]}`;
+    return <Navigate replace to={`${target}${query ? `?${query}` : ''}`} />;
+  }
+
   return (
     <div className="pt-4 mb-5">
       <Row>
@@ -102,29 +114,22 @@ const Personal: FC = () => {
             visible={tabName === 'overview'}
             introduction={userInfo?.bio_html || ''}
             data={topData}
-            username={username}
           />
 
           <ListHead
-            count={tabName === 'reputation' ? Number(userInfo?.rank) : count}
+            count={count}
             sort={order}
             visible={tabName !== 'overview'}
             tabName={tabName}
           />
-          <Answers data={list} visible={tabName === 'answers'} />
+          <Comments data={list} visible={tabName === 'comments'} />
           <DefaultList
             data={list}
             tabName={tabName}
-            visible={tabName === 'questions' || tabName === 'bookmarks'}
+            visible={tabName === 'posts' || tabName === 'bookmarks'}
           />
-          <Reputation data={list} visible={tabName === 'reputation'} />
-          <Comments data={list} visible={tabName === 'comments'} />
+          <Replies data={list} visible={tabName === 'replies'} />
           <Votes data={list} visible={tabName === 'votes'} />
-          <Badges
-            data={list}
-            visible={tabName === 'badges'}
-            username={username}
-          />
           {!list?.length && !isLoading && <Empty />}
 
           {count > 0 && (
diff --git a/ui/src/pages/Users/Register/components/SignUpForm/index.tsx b/ui/src/pages/Users/Register/components/SignUpForm/index.tsx
index 8dc30b965..6e00d28b1 100644
--- a/ui/src/pages/Users/Register/components/SignUpForm/index.tsx
+++ b/ui/src/pages/Users/Register/components/SignUpForm/index.tsx
@@ -17,27 +17,53 @@
  * under the License.
  */
 
-import React, { FormEvent, useState } from 'react';
-import { Form, Button } from 'react-bootstrap';
+import React, { FormEvent, useEffect, useState } from 'react';
+import { Form, Button, InputGroup } from 'react-bootstrap';
 import { Link } from 'react-router-dom';
 import { Trans, useTranslation } from 'react-i18next';
 
 import { useCaptchaPlugin } from '@/utils/pluginKit';
 import type {
   FormDataType,
+  RegisterEmailCodeReq,
   RegisterReqParams,
   UserInfoRes,
 } from '@/common/interface';
-import { register } from '@/services';
+import { register, sendRegisterEmailCode } from '@/services';
 import { handleFormError, scrollToElementTop } from '@/utils';
 import { useLegalClick } from '@/behaviour/useLegalClick';
+import { useToast } from '@/hooks';
 
 interface Props {
   callback: (user: UserInfoRes) => void;
 }
 
+const EMAIL_CODE_COUNTDOWN_SECONDS = 60;
+const ALLOWED_EMAIL_DOMAINS = new Set([
+  'hainanu.edu.cn',
+  'alumni.hainanu.edu.cn',
+]);
+
+const normalizeEmail = (email: string) => email.trim().toLowerCase();
+
+const getEmailDomain = (email: string) => {
+  const normalizedEmail = normalizeEmail(email);
+  const atIndex = normalizedEmail.lastIndexOf('@');
+  if (atIndex <= 0 || atIndex !== normalizedEmail.indexOf('@')) {
+    return '';
+  }
+  return normalizedEmail.slice(atIndex + 1);
+};
+
+const isAllowedEmail = (email: string) =>
+  ALLOWED_EMAIL_DOMAINS.has(getEmailDomain(email));
+
 const Index: React.FC<Props> = ({ callback }) => {
   const { t } = useTranslation('translation', { keyPrefix: 'login' });
+  const Toast = useToast();
+  const [emailCodeCountdown, setEmailCodeCountdown] = useState(0);
+  const [emailCodeSending, setEmailCodeSending] = useState(false);
+  const [emailCodeSentTo, setEmailCodeSentTo] = useState('');
   const [formData, setFormData] = useState<FormDataType>({
     name: {
       value: '',
@@ -54,18 +80,78 @@ const Index: React.FC<Props> = ({ callback }) => {
       isInvalid: false,
       errorMsg: '',
     },
+    pass_confirm: {
+      value: '',
+      isInvalid: false,
+      errorMsg: '',
+    },
+    email_code: {
+      value: '',
+      isInvalid: false,
+      errorMsg: '',
+    },
   });
 
   const emailCaptcha = useCaptchaPlugin('email');
   const nameRegex = /^[\w.-\s]{2,30}$/;
 
+  useEffect(() => {
+    if (emailCodeCountdown <= 0) {
+      return undefined;
+    }
+    const timer = window.setTimeout(() => {
+      setEmailCodeCountdown((seconds) => Math.max(0, seconds - 1));
+    }, 1000);
+    return () => window.clearTimeout(timer);
+  }, [emailCodeCountdown]);
+
   const handleChange = (params: FormDataType) => {
     setFormData({ ...formData, ...params });
   };
 
+  const checkEmailValidated = (): boolean => {
+    const email = normalizeEmail(formData.e_mail.value);
+    if (!email) {
+      handleChange({
+        e_mail: {
+          value: '',
+          isInvalid: true,
+          errorMsg: t('email.msg.empty'),
+        },
+      });
+      return false;
+    }
+    if (!/^[^\s@]+@[^\s@]+$/.test(email)) {
+      handleChange({
+        e_mail: {
+          value: email,
+          isInvalid: true,
+          errorMsg: t('email.msg.invalid'),
+        },
+      });
+      return false;
+    }
+    if (!isAllowedEmail(email)) {
+      handleChange({
+        e_mail: {
+          value: email,
+          isInvalid: true,
+          errorMsg: t('email.msg.domain'),
+        },
+      });
+      return false;
+    }
+    return true;
+  };
+
   const checkValidated = (): boolean => {
     let bol = true;
-    const { name, e_mail, pass } = formData;
+    const {
+      name,
+      pass,
+      pass_confirm: passConfirm,
+      email_code: emailCode,
+    } = formData;
 
     if (!name.value) {
       bol = false;
@@ -90,13 +176,28 @@ const Index: React.FC<Props> = ({ callback }) => {
       };
     }
 
-    if (!e_mail.value) {
+    const email = normalizeEmail(formData.e_mail.value);
+    if (!email) {
       bol = false;
       formData.e_mail = {
         value: '',
         isInvalid: true,
         errorMsg: t('email.msg.empty'),
       };
+    } else if (!/^[^\s@]+@[^\s@]+$/.test(email)) {
+      bol = false;
+      formData.e_mail = {
+        value: email,
+        isInvalid: true,
+        errorMsg: t('email.msg.invalid'),
+      };
+    } else if (!isAllowedEmail(email)) {
+      bol = false;
+      formData.e_mail = {
+        value: email,
+        isInvalid: true,
+        errorMsg: t('email.msg.domain'),
+      };
     }
 
     if (!pass.value) {
@@ -106,6 +207,45 @@ const Index: React.FC<Props> = ({ callback }) => {
         isInvalid: true,
         errorMsg: t('password.msg.empty'),
       };
+    } else if (pass.value.length < 8 || pass.value.length > 32) {
+      bol = false;
+      formData.pass = {
+        value: pass.value,
+        isInvalid: true,
+        errorMsg: t('password.msg.range'),
+      };
+    }
+
+    if (!passConfirm.value) {
+      bol = false;
+      formData.pass_confirm = {
+        value: '',
+        isInvalid: true,
+        errorMsg: t('password_confirm.msg.empty'),
+      };
+    } else if (pass.value !== passConfirm.value) {
+      bol = false;
+      formData.pass_confirm = {
+        value: passConfirm.value,
+        isInvalid: true,
+        errorMsg: t('password_confirm.msg.different'),
+      };
+    }
+
+    if (!emailCode.value) {
+      bol = false;
+      formData.email_code = {
+        value: '',
+        isInvalid: true,
+        errorMsg: t('verification_code.msg.empty'),
+      };
+    } else if (!/^\d{6}$/.test(emailCode.value)) {
+      bol = false;
+      formData.email_code = {
+        value: emailCode.value,
+        isInvalid: true,
+        errorMsg: t('verification_code.msg.invalid'),
+      };
     }
     setFormData({
       ...formData,
@@ -120,32 +260,87 @@ const Index: React.FC<Props> = ({ callback }) => {
     return bol;
   };
 
-  const legalClick = useLegalClick();
-
-  const handleRegister = (event?: any) => {
-    if (event) {
-      event.preventDefault();
-    }
-    const reqParams: RegisterReqParams = {
-      name: formData.name.value,
-      e_mail: formData.e_mail.value,
-      pass: formData.pass.value,
+  const sendEmailCode = () => {
+    const reqParams: RegisterEmailCodeReq = {
+      e_mail: normalizeEmail(formData.e_mail.value),
     };
-
     const captcha = emailCaptcha?.getCaptcha();
     if (captcha?.verify) {
       reqParams.captcha_code = captcha.captcha_code;
       reqParams.captcha_id = captcha.captcha_id;
     }
 
-    register(reqParams)
-      .then(async (res) => {
+    setEmailCodeSending(true);
+    sendRegisterEmailCode(reqParams)
+      .then(async () => {
         await emailCaptcha?.close();
+        setEmailCodeSentTo(reqParams.e_mail);
+        setEmailCodeCountdown(EMAIL_CODE_COUNTDOWN_SECONDS);
+        Toast.onShow({
+          msg: t('verification_code.sent'),
+          variant: 'success',
+        });
+      })
+      .catch((err) => {
+        if (err?.code === 429 && err?.data?.retry_after) {
+          setEmailCodeCountdown(Number(err.data.retry_after));
+        }
+        if (err?.isError) {
+          const captchaError = emailCaptcha?.handleCaptchaError(err.list);
+          const data = handleFormError(err, formData);
+          setFormData({ ...data });
+          const firstFormError = err.list.find(
+            (item: { error_field: string }) =>
+              item.error_field !== 'captcha_code',
+          );
+          if (!captchaError || firstFormError) {
+            const ele = document.getElementById(
+              firstFormError?.error_field || err.list[0].error_field,
+            );
+            scrollToElementTop(ele);
+          }
+          return;
+        }
+        if (err?.msg) {
+          Toast.onShow({ msg: err.msg, variant: 'danger' });
+        }
+      })
+      .finally(() => {
+        setEmailCodeSending(false);
+      });
+  };
+
+  const handleSendEmailCode = () => {
+    if (emailCodeSending || emailCodeCountdown > 0) {
+      return;
+    }
+    if (!checkEmailValidated()) {
+      return;
+    }
+    if (!emailCaptcha) {
+      sendEmailCode();
+      return;
+    }
+    emailCaptcha.check(sendEmailCode);
+  };
+
+  const legalClick = useLegalClick();
+
+  const handleRegister = () => {
+    const reqParams: RegisterReqParams = {
+      name: formData.name.value,
+      e_mail: normalizeEmail(formData.e_mail.value),
+      pass: formData.pass.value,
+      pass_confirm: formData.pass_confirm.value,
+      email_code: formData.email_code.value,
+    };
+
+    register(reqParams)
+      .then((res) => {
         callback(res);
       })
       .catch((err) => {
         if (err.isError) {
-          emailCaptcha?.handleCaptchaError(err.list);
           const data = handleFormError(err, formData);
           setFormData({ ...data });
           const ele = document.getElementById(err.list[0].error_field);
@@ -154,19 +349,13 @@ const Index: React.FC<Props> = ({ callback }) => {
       });
   };
 
-  const handleSubmit = async (event: FormEvent) => {
+  const handleSubmit = (event: FormEvent) => {
     event.preventDefault();
     event.stopPropagation();
     if (!checkValidated()) {
       return;
     }
-    if (!emailCaptcha) {
-      handleRegister();
-      return;
-    }
-    emailCaptcha.check(() => {
-      handleRegister();
-    });
+    handleRegister();
   };
 
   return (
@@ -194,33 +383,87 @@ const Index: React.FC<Props> = ({ callback }) => {
             {formData.name.errorMsg}
           </Form.Control.Feedback>
         </Form.Group>
-        <Form.Group controlId="email" className="mb-3">
+        <Form.Group controlId="e_mail" className="mb-3">
           <Form.Label>{t('email.label')}</Form.Label>
           <Form.Control
             autoComplete="off"
             required
-            type="e_mail"
+            type="email"
             isInvalid={formData.e_mail.isInvalid}
             value={formData.e_mail.value}
-            onChange={(e) =>
+            onChange={(e) => {
+              const email = e.target.value;
+              const changedAfterCodeSent = Boolean(
+                emailCodeSentTo && normalizeEmail(email) !== emailCodeSentTo,
+              );
+              if (changedAfterCodeSent) {
+                setEmailCodeSentTo('');
+                setEmailCodeCountdown(0);
+              }
               handleChange({
                 e_mail: {
-                  value: e.target.value,
+                  value: email,
                   isInvalid: false,
                   errorMsg: '',
                 },
-              })
-            }
+                email_code: {
+                  value: changedAfterCodeSent ? '' : formData.email_code.value,
+                  isInvalid: false,
+                  errorMsg: '',
+                },
+              });
+            }}
           />
           <Form.Control.Feedback type="invalid">
             {formData.e_mail.errorMsg}
           </Form.Control.Feedback>
         </Form.Group>
 
-        <Form.Group controlId="password" className="mb-3">
+        <Form.Group controlId="email_code" className="mb-3">
+          <Form.Label>{t('verification_code.label')}</Form.Label>
+          <InputGroup hasValidation>
+            <Form.Control
+              autoComplete="one-time-code"
+              required
+              inputMode="numeric"
+              maxLength={6}
+              placeholder={t('verification_code.placeholder')}
+              isInvalid={formData.email_code.isInvalid}
+              value={formData.email_code.value}
+              onChange={(e) =>
+                handleChange({
+                  email_code: {
+                    value: e.target.value.replace(/\D/g, '').slice(0, 6),
+                    isInvalid: false,
+                    errorMsg: '',
+                  },
+                })
+              }
+            />
+            <Button
+              type="button"
+              variant="outline-secondary"
+              disabled={emailCodeSending || emailCodeCountdown > 0}
+              className="text-nowrap"
+              onClick={handleSendEmailCode}>
+              {emailCodeSending
+                ? t('verification_code.sending')
+                : emailCodeCountdown > 0
+                  ? t('verification_code.resend', {
+                      seconds: emailCodeCountdown,
+                    })
+                  : t('verification_code.send')}
+            </Button>
+            <Form.Control.Feedback type="invalid">
+              {formData.email_code.errorMsg}
+            </Form.Control.Feedback>
+          </InputGroup>
+        </Form.Group>
+
+        <Form.Group controlId="pass" className="mb-3">
           <Form.Label>{t('password.label')}</Form.Label>
           <Form.Control
-            autoComplete="off"
+            autoComplete="new-password"
             required
             type="password"
             isInvalid={formData.pass.isInvalid}
@@ -240,6 +483,29 @@ const Index: React.FC<Props> = ({ callback }) => {
           </Form.Control.Feedback>
         </Form.Group>
 
+        <Form.Group controlId="pass_confirm" className="mb-3">
+          <Form.Label>{t('password_confirm.label')}</Form.Label>
+          <Form.Control
+            autoComplete="new-password"
+            required
+            type="password"
+            isInvalid={formData.pass_confirm.isInvalid}
+            value={formData.pass_confirm.value}
+            onChange={(e) =>
+              handleChange({
+                pass_confirm: {
+                  value: e.target.value,
+                  isInvalid: false,
+                  errorMsg: '',
+                },
+              })
+            }
+          />
+          <Form.Control.Feedback type="invalid">
+            {formData.pass_confirm.errorMsg}
+          </Form.Control.Feedback>
+        </Form.Group>
+
         <div className="d-grid">
           <Button variant="primary" type="submit">
             {t('signup', { keyPrefix: 'btns' })}
diff --git a/ui/src/pages/Users/Settings/Notification/index.tsx b/ui/src/pages/Users/Settings/Notification/index.tsx
index c0aa4061b..c4feec069 100644
--- a/ui/src/pages/Users/Settings/Notification/index.tsx
+++ b/ui/src/pages/Users/Settings/Notification/index.tsx
@@ -17,110 +17,18 @@
  * under the License.
  */
 
-import React, { useState, FormEvent, useEffect } from 'react';
+import React from 'react';
+import { Alert } from 'react-bootstrap';
 import { useTranslation } from 'react-i18next';
 
-import type { FormDataType, NotificationConfig } from '@/common/interface';
-import { useToast } from '@/hooks';
-import { useGetNotificationConfig, putNotificationConfig } from '@/services';
-import { SchemaForm, JSONSchema, UISchema, initFormData } from '@/components';
-
 const Index = () => {
-  const toast = useToast();
   const { t } = useTranslation('translation', {
     keyPrefix: 'settings.notification',
   });
-  const { data: configData } = useGetNotificationConfig();
-
-  const schema: JSONSchema = {
-    title: t('heading'),
-    properties: {
-      inbox: {
-        type: 'boolean',
-        title: t('inbox.label'),
-        description: t('inbox.description'),
-        default: configData?.inbox.enable,
-      },
-      all_new_question: {
-        type: 'boolean',
-        title: t('all_new_question.label'),
-        description: t('all_new_question.description'),
-        default: configData?.all_new_question.enable,
-      },
-      all_new_question_for_following_tags: {
-        type: 'boolean',
-        title: t('all_new_question_for_following_tags.label'),
-        description: t('all_new_question_for_following_tags.description'),
-        default: configData?.all_new_question_for_following_tags.enable,
-      },
-    },
-  };
-  const uiSchema: UISchema = {
-    inbox: {
-      'ui:widget': 'switch',
-      'ui:options': {
-        label: t('turn_on'),
-      },
-    },
-    all_new_question: {
-      'ui:widget': 'switch',
-      'ui:options': {
-        label: t('turn_on'),
-      },
-    },
-    all_new_question_for_following_tags: {
-      'ui:widget': 'switch',
-      'ui:options': {
-        label: t('turn_on'),
-        text: t('all_new_question_for_following_tags.description'),
-      },
-    },
-  };
-  const [formData, setFormData] = useState<FormDataType>(initFormData(schema));
-
-  useEffect(() => {
-    setFormData(initFormData(schema));
-  }, [configData]);
-
-  const handleSubmit = (event: FormEvent) => {
-    event.preventDefault();
-    event.stopPropagation();
-    const params = {
-      inbox: {
-        enable: formData.inbox.value,
-        key: configData?.inbox.key,
-      },
-      all_new_question: {
-        enable: formData.all_new_question.value,
-        key: configData?.all_new_question.key,
-      },
-      all_new_question_for_following_tags: {
-        enable: formData.all_new_question_for_following_tags.value,
-        key: configData?.all_new_question_for_following_tags.key,
-      },
-    } as NotificationConfig;
-
-    putNotificationConfig(params).then(() => {
-      toast.onShow({
-        msg: t('update', { keyPrefix: 'toast' }),
-        variant: 'success',
-      });
-    });
-  };
-
-  const handleChange = (ud) => {
-    setFormData(ud);
-  };
   return (
     <>
       <h3 className="mb-4">{t('heading')}</h3>
-      <SchemaForm
-        schema={schema}
-        uiSchema={uiSchema}
-        formData={formData}
-        onChange={handleChange}
-        onSubmit={handleSubmit}
-      />
+      <Alert variant="info">{t('email_disabled')}</Alert>
     </>
   );
 };
diff --git a/ui/src/pages/Users/index.tsx b/ui/src/pages/Users/index.tsx
index 9382af7a0..e00d110ed 100644
--- a/ui/src/pages/Users/index.tsx
+++ b/ui/src/pages/Users/index.tsx
@@ -39,7 +39,9 @@ const Users = () => {
     return null;
   }
 
-  const keys = Object.keys(users);
+  const keys = Object.keys(users).filter(
+    (key) => key !== 'users_with_the_most_reputation',
+  );
   return (
     <Row className="py-4 mb-4 d-flex justify-content-center">
       <Col xxl={12}>
@@ -84,9 +86,7 @@ const Users = () => {
                           {user.display_name}
                         </Link>
                         <div className="text-secondary small">
-                          {key === 'users_with_the_most_vote'
-                            ? `${user.vote_count} ${t('votes')}`
-                            : `${user.rank} ${t('reputation')}`}
+                          {`${user.vote_count} ${t('votes')}`}
                         </div>
                       </div>
                     </div>
diff --git a/ui/src/router/routes.ts b/ui/src/router/routes.ts
index 8423fb7a3..e383d1930 100644
--- a/ui/src/router/routes.ts
+++ b/ui/src/router/routes.ts
@@ -238,14 +238,6 @@ const routes: RouteNode[] = [
             path: 'review',
             page: 'pages/Review',
           },
-          {
-            path: '/badges',
-            page: 'pages/Badges/index',
-          },
-          {
-            path: '/badges/:badge_id',
-            page: 'pages/Badges/Detail/index',
-          },
         ],
       },
       {
@@ -429,10 +421,6 @@ const routes: RouteNode[] = [
             path: 'login',
             page: 'pages/Admin/Login',
           },
-          {
-            path: 'rules/privileges',
-            page: 'pages/Admin/Privileges',
-          },
           {
             path: 'installed-plugins',
             page: 'pages/Admin/Plugins/Installed',
@@ -441,10 +429,6 @@ const routes: RouteNode[] = [
             path: ':slug_name',
             page: 'pages/Admin/Plugins/Config',
           },
-          {
-            path: 'badges',
-            page: 'pages/Admin/Badges',
-          },
           {
             path: 'ai-assistant',
             page: 'pages/Admin/AiAssistant',
diff --git a/ui/src/services/client/forumSection.ts b/ui/src/services/client/forumSection.ts
new file mode 100644
index 000000000..88e371618
--- /dev/null
+++ b/ui/src/services/client/forumSection.ts
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import useSWR from 'swr';
+
+import request from '@/utils/request';
+import type * as Type from '@/common/interface';
+
+export const useForumSections = () => {
+  const { data, error } = useSWR<Type.ForumSection[]>(
+    '/answer/api/v1/forum/sections',
+    request.instance.get,
+  );
+  return { data: data || [], isLoading: !data && !error, error };
+};
diff --git a/ui/src/services/client/index.ts b/ui/src/services/client/index.ts
index 4d5c85c10..35e9e7db9 100644
--- a/ui/src/services/client/index.ts
+++ b/ui/src/services/client/index.ts
@@ -21,6 +21,7 @@ export * from './activity';
 export * from './personal';
 export * from './notification';
 export * from './question';
+export * from './forumSection';
 export * from './search';
 export * from './tag';
 export * from './settings';
diff --git a/ui/src/services/client/personal.ts b/ui/src/services/client/personal.ts
index 3ccb0d46f..84a20b582 100644
--- a/ui/src/services/client/personal.ts
+++ b/ui/src/services/client/personal.ts
@@ -53,8 +53,8 @@ interface ListRes {
 }
 
 export const usePersonalTop = (username: string, tabName: string) => {
-  const apiUrl = '/answer/api/v1/personal/qa/top?username=';
-  const { data, error } = useSWR<{ answer: any[]; question: any[] }, Error>(
+  const apiUrl = '/answer/api/v1/personal/content/top?username=';
+  const { data, error } = useSWR<{ comments: any[]; posts: any[] }, Error>(
     tabName === 'overview' ? `${apiUrl}${username}` : null,
     request.instance.get,
   );
@@ -67,23 +67,19 @@ export const usePersonalTop = (username: string, tabName: string) => {
 
 export const usePersonalListByTabName = (params: ListReq, tabName: string) => {
   let apiUrl: string | null = '';
-  if (tabName === 'answers') {
-    apiUrl = '/answer/api/v1/personal/answer/page';
+  if (tabName === 'comments') {
+    apiUrl = '/answer/api/v1/personal/post/comment/page';
   }
-  if (tabName === 'questions') {
-    apiUrl = '/answer/api/v1/personal/question/page';
+  if (tabName === 'posts') {
+    apiUrl = '/answer/api/v1/personal/post/page';
   }
   if (tabName === 'bookmarks') {
     delete params.order;
     apiUrl = '/answer/api/v1/personal/collection/page';
   }
-  if (tabName === 'comments') {
-    delete params.order;
-    apiUrl = '/answer/api/v1/personal/comment/page';
-  }
-  if (tabName === 'reputation') {
+  if (tabName === 'replies') {
     delete params.order;
-    apiUrl = '/answer/api/v1/personal/rank/page';
+    apiUrl = '/answer/api/v1/personal/reply/page';
   }
   if (tabName === 'votes') {
     delete params.username;
diff --git a/ui/src/services/client/question.ts b/ui/src/services/client/question.ts
index 169ccf3d3..d288f919f 100644
--- a/ui/src/services/client/question.ts
+++ b/ui/src/services/client/question.ts
@@ -74,7 +74,7 @@ export const useSimilarQuestion = (params: {
   question_id: string;
   page_size: number;
 }) => {
-  const apiUrl = `/answer/api/v1/question/similar/tag?${qs.stringify(params)}`;
+  const apiUrl = `/answer/api/v1/post/related?${qs.stringify(params)}`;
 
   const { data, error } = useSWR<Type.ListResult, Error>(
     params.question_id ? apiUrl : null,
@@ -108,7 +108,7 @@ export const putInviteUser = (
 };
 
 export const unDeleteAnswer = (id) => {
-  return request.post('/answer/api/v1/answer/recover', {
+  return request.post('/answer/api/v1/post/comment/recover', {
     answer_id: id,
   });
 };
diff --git a/ui/src/services/common.ts b/ui/src/services/common.ts
index f612bac93..39692a1f0 100644
--- a/ui/src/services/common.ts
+++ b/ui/src/services/common.ts
@@ -108,7 +108,7 @@ export const useQueryAnswerInfo = (id: string) => {
   return useSWR<{
     info;
     question;
-  }>(`/answer/api/v1/answer/info?id=${id}`, request.instance.get);
+  }>(`/answer/api/v1/post/comment/info?id=${id}`, request.instance.get);
 };
 
 export const modifyQuestion = (
@@ -118,7 +118,7 @@ export const modifyQuestion = (
 };
 
 export const modifyAnswer = (params: Type.AnswerParams) => {
-  return request.put(`/answer/api/v1/answer`, params);
+  return request.put(`/answer/api/v1/post/comment`, params);
 };
 
 export const login = (params: Type.LoginReqParams) => {
@@ -135,6 +135,12 @@ export const register = (params: Type.RegisterReqParams) => {
   );
 };
 
+export const sendRegisterEmailCode = (params: Type.RegisterEmailCodeReq) => {
+  return request.post('/answer/api/v1/user/register/email/code', params, {
+    timeout: 20000,
+  });
+};
+
 export const logout = () => {
   return request.get('/answer/api/v1/user/logout');
 };
@@ -221,12 +227,12 @@ export const useQuestionLink = (params: {
 };
 
 export const getAnswers = (params: Type.AnswersReq) => {
-  const apiUrl = `/answer/api/v1/answer/page?${qs.stringify(params)}`;
+  const apiUrl = `/answer/api/v1/post/comment/page?${qs.stringify(params)}`;
   return request.get<Type.ListResult<Type.AnswerItem>>(apiUrl);
 };
 
 export const postAnswer = (params: Type.PostAnswerReq) => {
-  return request.post('/answer/api/v1/answer', params);
+  return request.post('/answer/api/v1/post/comment', params);
 };
 
 export const bookmark = (params: {
@@ -297,7 +303,7 @@ export const deleteAnswer = (params: {
   captcha_code?: string;
   captcha_id?: string;
 }) => {
-  return request.delete('/answer/api/v1/answer', params);
+  return request.delete('/answer/api/v1/post/comment', params);
 };
 
 export const closeQuestion = (params: {
diff --git a/ui/src/utils/saveDraft.ts b/ui/src/utils/saveDraft.ts
index 6d7f18145..94f252705 100644
--- a/ui/src/utils/saveDraft.ts
+++ b/ui/src/utils/saveDraft.ts
@@ -30,6 +30,7 @@ export type QuestionDraft = {
     title: string;
     content: string;
     tags: any[];
+    section_id?: number;
     answer_content: string;
   };
   callback?: () => void;