diff --git a/CHANGELOG.md b/CHANGELOG.md
index 091cff25..3e1502d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
-### [v1.6.7](https://gitee.com/koogua/course-tencent-cloud/releases/v1.6.7)(2023-10-30)
+### [v1.6.7](https://gitee.com/koogua/course-tencent-cloud/releases/v1.6.7)(2023-12-15)
 
+- 增加文章分类功能
+- 增加问题分类功能
+- 增加审核等批量功能
+- 增加若干业务插件埋点
+- 精简重构大量业务逻辑
+- 移除秒杀营销功能
+- 已发现的问题修复
 
 ### [v1.6.6](https://gitee.com/koogua/course-tencent-cloud/releases/v1.6.6)(2023-08-30)
 
diff --git a/app/Console/Migrations/V20231201101515.php b/app/Console/Migrations/V20231201101515.php
new file mode 100644
index 00000000..0fbecd3f
--- /dev/null
+++ b/app/Console/Migrations/V20231201101515.php
@@ -0,0 +1,87 @@
+<?php
+/**
+ * @copyright Copyright (c) 2023 深圳市酷瓜软件有限公司
+ * @license https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * @link https://www.koogua.com
+ */
+
+namespace App\Console\Migrations;
+
+use App\Models\ChapterUser as ChapterUserModel;
+use App\Models\CourseUser as CourseUserModel;
+use Phalcon\Mvc\Model\ResultsetInterface;
+
+class V20231201101515 extends Migration
+{
+
+    public function run()
+    {
+        $this->handleCourseUsers();
+        $this->handleChapterUsers();
+    }
+
+    protected function handleCourseUsers()
+    {
+        $courseUsers = $this->findCourseUsers();
+
+        if ($courseUsers->count() == 0) return;
+
+        $mappings = [];
+
+        /**
+         * 只保留第一条记录
+         */
+        foreach ($courseUsers as $courseUser) {
+            $key = $courseUser->course_id . '-' . $courseUser->user_id;
+            if (!isset($mappings[$key])) {
+                $mappings[$key] = 1;
+            } else {
+                $courseUser->deleted = 1;
+                $courseUser->update();
+            }
+        }
+    }
+
+    protected function handleChapterUsers()
+    {
+        $chapterUsers = $this->findChapterUsers();
+
+        if ($chapterUsers->count() == 0) return;
+
+        /**
+         * 只保留第一条记录
+         */
+        foreach ($chapterUsers as $chapterUser) {
+            $key = $chapterUser->chapter_id . '-' . $chapterUser->user_id;
+            if (!isset($mappings[$key])) {
+                $mappings[$key] = 1;
+            } else {
+                $chapterUser->deleted = 1;
+                $chapterUser->update();
+            }
+        }
+    }
+
+    /**
+     * @return ResultsetInterface|CourseUserModel[]
+     */
+    protected function findCourseUsers()
+    {
+        return CourseUserModel::query()
+            ->where('deleted = 0')
+            ->orderBy('id DESC')
+            ->execute();
+    }
+
+    /**
+     * @return ResultsetInterface|ChapterUserModel[]
+     */
+    protected function findChapterUsers()
+    {
+        return ChapterUserModel::query()
+            ->where('deleted = 0')
+            ->orderBy('id DESC')
+            ->execute();
+    }
+
+}
\ No newline at end of file
diff --git a/app/Http/Home/Controllers/TeacherController.php b/app/Http/Home/Controllers/TeacherController.php
index 91b2ab65..6dfc10c6 100644
--- a/app/Http/Home/Controllers/TeacherController.php
+++ b/app/Http/Home/Controllers/TeacherController.php
@@ -31,7 +31,7 @@ class TeacherController extends Controller
             return $this->response->redirect($location);
         }
 
-        $this->seo->prependTitle('教师');
+        $this->seo->prependTitle('师资');
     }
 
     /**
diff --git a/app/Http/Home/Views/teacher/list.volt b/app/Http/Home/Views/teacher/list.volt
index 8d8fb097..2b850ea3 100644
--- a/app/Http/Home/Views/teacher/list.volt
+++ b/app/Http/Home/Views/teacher/list.volt
@@ -6,7 +6,7 @@
 
     <div class="layui-breadcrumb breadcrumb">
         <a href="/">首页</a>
-        <a><cite>教师</cite></a>
+        <a><cite>师资</cite></a>
     </div>
 
     <div id="teacher-list" data-url="{{ pager_url }}"></div>
diff --git a/db/migrations/20210403184518.php b/db/migrations/20210403184518.php
index cc46ce94..787453a3 100644
--- a/db/migrations/20210403184518.php
+++ b/db/migrations/20210403184518.php
@@ -155,7 +155,7 @@ final class V20210403184518 extends AbstractMigration
                 'id' => 5,
                 'parent_id' => 0,
                 'level' => 1,
-                'name' => '教师',
+                'name' => '师资',
                 'path' => ',5,',
                 'target' => '_self',
                 'url' => '/teacher/list',