diff --git a/app/Builders/CategoryTreeList.php b/app/Builders/CategoryTreeList.php
index 82f22690..dfb524d1 100644
--- a/app/Builders/CategoryTreeList.php
+++ b/app/Builders/CategoryTreeList.php
@@ -58,7 +58,8 @@ class CategoryTreeList extends Builder
     {
         return CategoryModel::query()
             ->where('parent_id = :parent_id:', ['parent_id' => $categoryId])
-            ->andWhere('deleted = 0')
+            ->andWhere('published = 1')
+            ->orderBy('priority ASC')
             ->execute();
     }
 
diff --git a/app/Caches/CategoryList.php b/app/Caches/CategoryList.php
index 0c792f9d..e73ad4cf 100644
--- a/app/Caches/CategoryList.php
+++ b/app/Caches/CategoryList.php
@@ -31,7 +31,7 @@ class CategoryList extends Cache
          */
         $categories = CategoryModel::query()
             ->columns(['id', 'parent_id', 'name', 'priority', 'level', 'path'])
-            ->where('published = 1 AND deleted = 0')
+            ->where('published = 1')
             ->execute();
 
         if ($categories->count() == 0) {
diff --git a/app/Caches/ImChatGroup.php b/app/Caches/ImChatGroup.php
index c1a41d1a..8c7d7ec1 100644
--- a/app/Caches/ImChatGroup.php
+++ b/app/Caches/ImChatGroup.php
@@ -16,7 +16,7 @@ class ImGroup extends Cache
 
     public function getKey($id = null)
     {
-        return "im_chat_group:{$id}";
+        return "im_group:{$id}";
     }
 
     public function getContent($id = null)
diff --git a/app/Console/Tasks/CleanLogTask.php b/app/Console/Tasks/CleanLogTask.php
index 7cc0287a..4e171edb 100644
--- a/app/Console/Tasks/CleanLogTask.php
+++ b/app/Console/Tasks/CleanLogTask.php
@@ -18,6 +18,7 @@ class CleanLogTask extends Task
         $this->cleanMailerLog();
         $this->cleanSmserLog();
         $this->cleanVodLog();
+        $this->cleanLiveLog();
         $this->cleanStorageLog();
         $this->cleanAlipayLog();
         $this->cleanWxpayLog();
@@ -81,6 +82,14 @@ class CleanLogTask extends Task
         $this->cleanLog('vod', 7);
     }
 
+    /**
+     * 清理直播服务日志
+     */
+    protected function cleanLiveLog()
+    {
+        $this->cleanLog('live', 7);
+    }
+
     /**
      * 清理存储服务日志
      */
diff --git a/app/Console/Tasks/SyncChapterCounterTask.php b/app/Console/Tasks/SyncChapterCounterTask.php
index 61c3b3de..cce2bcf6 100644
--- a/app/Console/Tasks/SyncChapterCounterTask.php
+++ b/app/Console/Tasks/SyncChapterCounterTask.php
@@ -50,13 +50,11 @@ class SyncChapterCounterTask extends Task
 
         $chapterCache = new ChapterCache();
 
-        $hour = date('H');
-
-        $recount = $this->checkEnableRecount();
+        $allowRecount = $this->allowRecount();
 
         foreach ($chapters as $chapter) {
 
-            if ($recount && $hour % 3 == 0) {
+            if ($allowRecount) {
 
                 $chapter->user_count = $chapterRepo->countUsers($chapter->id);
                 $chapter->lesson_count = $chapterRepo->countLessons($chapter->id);
@@ -94,11 +92,9 @@ class SyncChapterCounterTask extends Task
         return $syncer->getSyncKey();
     }
 
-    protected function checkEnableRecount()
+    protected function allowRecount()
     {
-        $config = $this->getDI()->get('config');
-
-        return $config->syncer->recount_chapter ?? false;
+        return date('H') % 2 == 0;
     }
 
 }
diff --git a/app/Console/Tasks/SyncCommentCounterTask.php b/app/Console/Tasks/SyncCommentCounterTask.php
index 7485430d..f63321f3 100644
--- a/app/Console/Tasks/SyncCommentCounterTask.php
+++ b/app/Console/Tasks/SyncCommentCounterTask.php
@@ -47,13 +47,11 @@ class SyncCommentCounterTask extends Task
 
         $counterCache = new CommentCounterCache();
 
-        $hour = date('H');
-
-        $recount = $this->checkEnableRecount();
+        $allowRecount = $this->allowRecount();
 
         foreach ($comments as $comment) {
 
-            if ($recount && $hour % 3 == 0) {
+            if ($allowRecount) {
 
                 $comment->reply_count = $commentRepo->countReplies($comment->id);
                 $comment->like_count = $commentRepo->countLikes($comment->id);
@@ -83,11 +81,9 @@ class SyncCommentCounterTask extends Task
         return $syncer->getSyncKey();
     }
 
-    protected function checkEnableRecount()
+    protected function allowRecount()
     {
-        $config = $this->getDI()->get('config');
-
-        return $config->syncer->recount_comment ?? false;
+        return date('H') == 5;
     }
 
 }
diff --git a/app/Console/Tasks/SyncConsultCounterTask.php b/app/Console/Tasks/SyncConsultCounterTask.php
index 834e2250..46fc53cc 100644
--- a/app/Console/Tasks/SyncConsultCounterTask.php
+++ b/app/Console/Tasks/SyncConsultCounterTask.php
@@ -47,13 +47,11 @@ class SyncConsultCounterTask extends Task
 
         $counterCache = new ConsultCounterCache();
 
-        $hour = date('H');
-
-        $recount = $this->checkEnableRecount();
+        $allowRecount = $this->allowRecount();
 
         foreach ($consults as $consult) {
 
-            if ($recount && $hour % 3 == 0) {
+            if ($allowRecount) {
 
                 $consult->like_count = $consultRepo->countLikes($consult->id);
                 $consult->update();
@@ -81,11 +79,9 @@ class SyncConsultCounterTask extends Task
         return $syncer->getSyncKey();
     }
 
-    protected function checkEnableRecount()
+    protected function allowRecount()
     {
-        $config = $this->getDI()->get('config');
-
-        return $config->syncer->recount_consult ?? false;
+        return date('H') == 1;
     }
 
 }
diff --git a/app/Console/Tasks/SyncCourseCounterTask.php b/app/Console/Tasks/SyncCourseCounterTask.php
index 07313476..51bc25b7 100644
--- a/app/Console/Tasks/SyncCourseCounterTask.php
+++ b/app/Console/Tasks/SyncCourseCounterTask.php
@@ -50,16 +50,13 @@ class SyncCourseCounterTask extends Task
 
         $courseCache = new CourseCache();
 
-        $hour = date('H');
-
-        $recount = $this->checkEnableRecount();
+        $allowRecount = $this->allowRecount();
 
         foreach ($courses as $course) {
 
-            if ($recount && $hour % 3 == 0) {
+            if ($allowRecount) {
 
                 $course->user_count = $courseRepo->countUsers($course->id);
-                $course->lesson_count = $courseRepo->countLessons($course->id);
                 $course->comment_count = $courseRepo->countComments($course->id);
                 $course->consult_count = $courseRepo->countConsults($course->id);
                 $course->review_count = $courseRepo->countReviews($course->id);
@@ -75,7 +72,6 @@ class SyncCourseCounterTask extends Task
 
                 if ($counter) {
                     $course->user_count = $counter['user_count'];
-                    $course->lesson_count = $counter['lesson_count'];
                     $course->comment_count = $counter['comment_count'];
                     $course->consult_count = $counter['consult_count'];
                     $course->review_count = $counter['review_count'];
@@ -95,11 +91,9 @@ class SyncCourseCounterTask extends Task
         return $syncer->getSyncKey();
     }
 
-    protected function checkEnableRecount()
+    protected function allowRecount()
     {
-        $config = $this->getDI()->get('config');
-
-        return $config->syncer->recount_course ?? false;
+        return date('H') % 2 == 0;
     }
 
 }
diff --git a/app/Console/Tasks/SyncReviewCounterTask.php b/app/Console/Tasks/SyncReviewCounterTask.php
index b6d512d4..ca67c0dc 100644
--- a/app/Console/Tasks/SyncReviewCounterTask.php
+++ b/app/Console/Tasks/SyncReviewCounterTask.php
@@ -47,13 +47,11 @@ class SyncReviewCounterTask extends Task
 
         $counterCache = new ReviewCounterCache();
 
-        $hour = date('H');
-
-        $recount = $this->checkEnableRecount();
+        $allowRecount = $this->allowRecount();
 
         foreach ($reviews as $review) {
 
-            if ($recount && $hour % 3 == 0) {
+            if ($allowRecount) {
 
                 $review->like_count = $reviewRepo->countLikes($review->id);
                 $review->update();
@@ -81,11 +79,9 @@ class SyncReviewCounterTask extends Task
         return $syncer->getSyncKey();
     }
 
-    protected function checkEnableRecount()
+    protected function allowRecount()
     {
-        $config = $this->getDI()->get('config');
-
-        return $config->syncer->recount_review ?? false;
+        return date('H') == 2;
     }
 
 }
diff --git a/app/Http/Web/Services/ImGroupTrait.php b/app/Http/Web/Services/ImGroupTrait.php
index 045024db..00600206 100644
--- a/app/Http/Web/Services/ImGroupTrait.php
+++ b/app/Http/Web/Services/ImGroupTrait.php
@@ -72,6 +72,8 @@ Trait ImGroupTrait
                 'group_id' => $group->id,
                 'user_id' => $applicant->id,
             ]);
+            $group->user_count += 1;
+            $group->update();
         }
 
         $itemInfo = $message->item_info;
diff --git a/app/Models/Category.php b/app/Models/Category.php
index 1e48b380..dc0fe2ed 100644
--- a/app/Models/Category.php
+++ b/app/Models/Category.php
@@ -117,6 +117,10 @@ class Category extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public function afterCreate()
diff --git a/app/Models/Chapter.php b/app/Models/Chapter.php
index 26a99523..669df6c4 100644
--- a/app/Models/Chapter.php
+++ b/app/Models/Chapter.php
@@ -216,6 +216,10 @@ class Chapter extends Model
     {
         $this->update_time = time();
 
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
+
         if (is_array($this->attrs)) {
             $this->attrs = kg_json_encode($this->attrs);
         }
diff --git a/app/Models/Comment.php b/app/Models/Comment.php
index cfb44bd0..35c5758d 100644
--- a/app/Models/Comment.php
+++ b/app/Models/Comment.php
@@ -123,6 +123,10 @@ class Comment extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
 }
diff --git a/app/Models/Consult.php b/app/Models/Consult.php
index cd5979cf..4e1d803f 100644
--- a/app/Models/Consult.php
+++ b/app/Models/Consult.php
@@ -109,6 +109,10 @@ class Consult extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
 }
diff --git a/app/Models/Course.php b/app/Models/Course.php
index a90766c0..a6144f5d 100644
--- a/app/Models/Course.php
+++ b/app/Models/Course.php
@@ -284,6 +284,10 @@ class Course extends Model
     {
         $this->update_time = time();
 
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
+
         if (Text::startsWith($this->cover, 'http')) {
             $this->cover = self::getCoverPath($this->cover);
         }
diff --git a/app/Models/Danmu.php b/app/Models/Danmu.php
index 3a4334f1..aa08629d 100644
--- a/app/Models/Danmu.php
+++ b/app/Models/Danmu.php
@@ -145,6 +145,10 @@ class Danmu extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public static function sizeTypes()
diff --git a/app/Models/Help.php b/app/Models/Help.php
index 6ee09917..455a98f2 100644
--- a/app/Models/Help.php
+++ b/app/Models/Help.php
@@ -89,6 +89,10 @@ class Help extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public function afterCreate()
diff --git a/app/Models/Nav.php b/app/Models/Nav.php
index 293d9607..626781b9 100644
--- a/app/Models/Nav.php
+++ b/app/Models/Nav.php
@@ -142,6 +142,10 @@ class Nav extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public static function positionTypes()
diff --git a/app/Models/Package.php b/app/Models/Package.php
index eaf5919b..d929b49c 100644
--- a/app/Models/Package.php
+++ b/app/Models/Package.php
@@ -103,6 +103,10 @@ class Package extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public function afterCreate()
diff --git a/app/Models/Page.php b/app/Models/Page.php
index a5390a87..dee6684a 100644
--- a/app/Models/Page.php
+++ b/app/Models/Page.php
@@ -29,6 +29,13 @@ class Page extends Model
      */
     public $content;
 
+    /**
+     * 发布标识
+     *
+     * @var int
+     */
+    public $published;
+
     /**
      * 删除标识
      *
@@ -75,6 +82,10 @@ class Page extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public function afterCreate()
diff --git a/app/Models/Review.php b/app/Models/Review.php
index b0bf7366..3df6c879 100644
--- a/app/Models/Review.php
+++ b/app/Models/Review.php
@@ -134,6 +134,10 @@ class Review extends Model
         $this->update_time = time();
 
         $this->rating = $this->getAvgRating();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     protected function getAvgRating()
diff --git a/app/Models/Slide.php b/app/Models/Slide.php
index 88dd82eb..c7f957e5 100644
--- a/app/Models/Slide.php
+++ b/app/Models/Slide.php
@@ -135,6 +135,10 @@ class Slide extends Model
     {
         $this->update_time = time();
 
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
+
         if (Text::startsWith($this->cover, 'http')) {
             $this->cover = self::getCoverPath($this->cover);
         }
diff --git a/app/Models/Topic.php b/app/Models/Topic.php
index 9294fef0..097a364f 100644
--- a/app/Models/Topic.php
+++ b/app/Models/Topic.php
@@ -89,6 +89,10 @@ class Topic extends Model
     public function beforeUpdate()
     {
         $this->update_time = time();
+
+        if ($this->deleted == 1) {
+            $this->published = 0;
+        }
     }
 
     public function afterCreate()
diff --git a/app/Repos/Category.php b/app/Repos/Category.php
index a00c5bfc..27ee9249 100644
--- a/app/Repos/Category.php
+++ b/app/Repos/Category.php
@@ -72,7 +72,6 @@ class Category extends Repository
     {
         return CategoryModel::query()
             ->where('parent_id = 0')
-            ->andWhere('deleted = 0')
             ->andWhere('published = 1')
             ->execute();
     }
@@ -85,7 +84,6 @@ class Category extends Repository
     {
         return CategoryModel::query()
             ->where('parent_id = :parent_id:', ['parent_id' => $categoryId])
-            ->andWhere('deleted = 0')
             ->andWhere('published = 1')
             ->execute();
     }
@@ -93,7 +91,7 @@ class Category extends Repository
     public function countChildCategories($categoryId)
     {
         return CategoryModel::count([
-            'conditions' => 'parent_id = :parent_id: AND deleted = 0 AND published = 1',
+            'conditions' => 'parent_id = :parent_id: AND published = 1',
             'bind' => ['parent_id' => $categoryId],
         ]);
     }
@@ -101,7 +99,7 @@ class Category extends Repository
     public function countCourses($categoryId)
     {
         $phql = 'SELECT COUNT(*) AS total FROM %s cc JOIN %s c ON cc.course_id = c.id 
-                 WHERE cc.category_id = :category_id: AND c.published = 1 AND c.deleted = 0';
+                 WHERE cc.category_id = :category_id: AND c.published = 1 AND c.published = 1';
 
         $phql = sprintf($phql, CourseCategoryModel::class, CourseModel::class);
 
diff --git a/app/Repos/Course.php b/app/Repos/Course.php
index 76485636..f0cd5cd7 100644
--- a/app/Repos/Course.php
+++ b/app/Repos/Course.php
@@ -146,7 +146,6 @@ class Course extends Repository
             ->join(CourseUserModel::class, 'u.id = cu.user_id', 'cu')
             ->where('cu.course_id = :course_id:', ['course_id' => $courseId])
             ->andWhere('cu.role_type = :role_type:', ['role_type' => $roleType])
-            ->andWhere('u.deleted = 0')
             ->getQuery()->execute();
     }
 
@@ -161,7 +160,7 @@ class Course extends Repository
             ->addFrom(CategoryModel::class, 'c')
             ->join(CourseCategoryModel::class, 'c.id = cc.category_id', 'cc')
             ->where('cc.course_id = :course_id:', ['course_id' => $courseId])
-            ->andWhere('c.deleted = 0')
+            ->andWhere('c.published = 1')
             ->getQuery()->execute();
     }
 
@@ -176,7 +175,7 @@ class Course extends Repository
             ->addFrom(PackageModel::class, 'p')
             ->join(CoursePackageModel::class, 'p.id = cp.package_id', 'cp')
             ->where('cp.course_id = :course_id:', ['course_id' => $courseId])
-            ->andWhere('p.deleted = 0')
+            ->andWhere('p.published = 1')
             ->getQuery()->execute();
     }
 
@@ -191,7 +190,7 @@ class Course extends Repository
             ->addFrom(CourseModel::class, 'c')
             ->join(CourseRelatedModel::class, 'c.id = cr.related_id', 'cr')
             ->where('cr.course_id = :course_id:', ['course_id' => $courseId])
-            ->andWhere('c.deleted = 0')
+            ->andWhere('c.published = 1')
             ->getQuery()->execute();
     }
 
diff --git a/app/Repos/Package.php b/app/Repos/Package.php
index d75cabc2..4450e4fc 100644
--- a/app/Repos/Package.php
+++ b/app/Repos/Package.php
@@ -87,7 +87,7 @@ class Package extends Repository
             ->addFrom(CourseModel::class, 'c')
             ->join(CoursePackageModel::class, 'c.id = cp.course_id', 'cp')
             ->where('cp.package_id = :package_id:', ['package_id' => $packageId])
-            ->andWhere('c.deleted = 0')
+            ->andWhere('c.published = 1')
             ->getQuery()
             ->execute();
     }
diff --git a/app/Repos/Topic.php b/app/Repos/Topic.php
index b76f0394..6b87f1fd 100644
--- a/app/Repos/Topic.php
+++ b/app/Repos/Topic.php
@@ -83,7 +83,7 @@ class Topic extends Repository
             ->addFrom(CourseModel::class, 'c')
             ->join(CourseTopicModel::class, 'c.id = ct.course_id', 'ct')
             ->where('ct.topic_id = :topic_id:', ['topic_id' => $topicId])
-            ->andWhere('c.deleted = 0')
+            ->andWhere('c.published = 1')
             ->getQuery()->execute();
     }
 
diff --git a/app/Services/Captcha.php b/app/Services/Captcha.php
index 26278718..c5b98dc1 100644
--- a/app/Services/Captcha.php
+++ b/app/Services/Captcha.php
@@ -59,7 +59,7 @@ class Captcha extends Service
             $request = new DescribeCaptchaResultRequest();
 
             /**
-             * 注意：CaptchaType 和 CaptchaAppId 强类型要求
+             * 注意：CaptchaType和CaptchaAppId强类型要求
              */
             $params = json_encode([
                 'Ticket' => $ticket,
diff --git a/app/Services/Frontend/Chapter/ChapterBasic.php b/app/Services/Frontend/Chapter/ChapterBasic.php
index 25966e2c..309d9194 100644
--- a/app/Services/Frontend/Chapter/ChapterBasic.php
+++ b/app/Services/Frontend/Chapter/ChapterBasic.php
@@ -48,11 +48,6 @@ class ChapterBasic extends FrontendService
 
         $playUrls = $chapterVodService->getPlayUrls($chapter->id);
 
-        /**
-         * @var array $attrs
-         */
-        $attrs = $chapter->attrs;
-
         return [
             'id' => $chapter->id,
             'title' => $chapter->title,
@@ -83,11 +78,6 @@ class ChapterBasic extends FrontendService
 
         $live = $chapterRepo->findChapterLive($chapter->id);
 
-        /**
-         * @var array $attrs
-         */
-        $attrs = $chapter->attrs;
-
         return [
             'id' => $chapter->id,
             'title' => $chapter->title,
diff --git a/app/Services/Frontend/Chapter/Learning.php b/app/Services/Frontend/Chapter/Learning.php
index d87300cb..ee217ddc 100644
--- a/app/Services/Frontend/Chapter/Learning.php
+++ b/app/Services/Frontend/Chapter/Learning.php
@@ -28,6 +28,7 @@ class Learning extends FrontendService
             'course_id' => $chapter->course_id,
             'chapter_id' => $chapter->id,
             'user_id' => $user->id,
+            'position' => 0,
         ];
 
         $data['request_id'] = $validator->checkRequestId($post['request_id']);
diff --git a/app/Services/Frontend/Course/Favorite.php b/app/Services/Frontend/Course/Favorite.php
index d350e0bc..c561bca6 100644
--- a/app/Services/Frontend/Course/Favorite.php
+++ b/app/Services/Frontend/Course/Favorite.php
@@ -5,9 +5,9 @@ namespace App\Services\Frontend\Course;
 use App\Models\Course as CourseModel;
 use App\Models\CourseFavorite as CourseFavoriteModel;
 use App\Models\User as UserModel;
-use App\Repos\CourseFavorite as CourseFavoriteRepo;
 use App\Services\Frontend\CourseTrait;
 use App\Services\Frontend\Service as FrontendService;
+use App\Validators\Course as CourseValidator;
 use App\Validators\UserDailyLimit as UserDailyLimitValidator;
 
 class Favorite extends FrontendService
@@ -25,18 +25,18 @@ class Favorite extends FrontendService
 
         $validator->checkFavoriteLimit($user);
 
-        $favoriteRepo = new CourseFavoriteRepo();
+        $validator = new CourseValidator();
 
-        $favorite = $favoriteRepo->findCourseFavorite($course->id, $user->id);
+        $favorite = $validator->checkIfFavorited($course->id, $user->id);
 
         if (!$favorite) {
 
             $favorite = new CourseFavoriteModel();
 
-            $favorite->course_id = $course->id;
-            $favorite->user_id = $user->id;
-
-            $favorite->create();
+            $favorite->create([
+                'course_id' => $course->id,
+                'user_id' => $user->id,
+            ]);
 
             $this->incrCourseFavoriteCount($course);
 
@@ -44,18 +44,16 @@ class Favorite extends FrontendService
 
             if ($favorite->deleted == 0) {
 
-                $favorite->deleted = 1;
+                $favorite->update(['deleted' => 1]);
 
                 $this->decrCourseFavoriteCount($course);
 
             } else {
 
-                $favorite->deleted = 0;
+                $favorite->update(['deleted' => 0]);
 
                 $this->incrCourseFavoriteCount($course);
             }
-
-            $favorite->update();
         }
 
         $this->incrUserDailyFavoriteCount($user);
diff --git a/app/Services/Frontend/Messenger/ContactList.php b/app/Services/Frontend/Messenger/ContactList.php
deleted file mode 100644
index b0bbbfe7..00000000
--- a/app/Services/Frontend/Messenger/ContactList.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-namespace App\Services\Frontend\Messenger;
-
-use App\Services\Frontend\Service as FrontendService;
-
-class ContactList extends FrontendService
-{
-
-    public function handle()
-    {
-        $user = $this->getLoginUser();
-
-        $mine = [
-
-        ];
-    }
-
-}
diff --git a/app/Validators/Chapter.php b/app/Validators/Chapter.php
index 7b9599d9..073c5a6e 100644
--- a/app/Validators/Chapter.php
+++ b/app/Validators/Chapter.php
@@ -137,7 +137,7 @@ class Chapter extends Validator
         return $status;
     }
 
-    public function checkPublishAbility($chapter)
+    public function checkPublishAbility(ChapterModel $chapter)
     {
         $courseRepo = new CourseRepo();
 
@@ -160,7 +160,7 @@ class Chapter extends Validator
         }
     }
 
-    public function checkDeleteAbility($chapter)
+    public function checkDeleteAbility(ChapterModel $chapter)
     {
         $chapterRepo = new ChapterRepo();
 
@@ -178,13 +178,13 @@ class Chapter extends Validator
     {
         $repo = new ChapterLikeRepo();
 
-        $chapterLike = $repo->findChapterLike($chapterId, $userId);
+        $like = $repo->findChapterLike($chapterId, $userId);
 
-        if ($chapterLike && time() - $chapterLike->create_time > 5 * 60) {
+        if ($like && time() - $like->create_time > 5 * 60) {
             throw new BadRequestException('chapter.has_liked');
         }
 
-        return $chapterLike;
+        return $like;
     }
 
 }
diff --git a/app/Validators/Comment.php b/app/Validators/Comment.php
index f76743f8..50508370 100644
--- a/app/Validators/Comment.php
+++ b/app/Validators/Comment.php
@@ -80,13 +80,13 @@ class Comment extends Validator
     {
         $repo = new CommentLikeRepo();
 
-        $commentLike = $repo->findCommentLike($chapterId, $userId);
+        $like = $repo->findCommentLike($chapterId, $userId);
 
-        if ($commentLike && time() - $commentLike->create_time > 5 * 60) {
+        if ($like && time() - $like->create_time > 5 * 60) {
             throw new BadRequestException('comment.has_liked');
         }
 
-        return $commentLike;
+        return $like;
     }
 
 }
diff --git a/app/Validators/Consult.php b/app/Validators/Consult.php
index 6bf2a922..51a42ed8 100644
--- a/app/Validators/Consult.php
+++ b/app/Validators/Consult.php
@@ -85,13 +85,13 @@ class Consult extends Validator
     {
         $repo = new ConsultLikeRepo();
 
-        $consultLike = $repo->findConsultLike($chapterId, $userId);
+        $like = $repo->findConsultLike($chapterId, $userId);
 
-        if ($consultLike && time() - $consultLike->create_time > 5 * 60) {
+        if ($like && time() - $like->create_time > 5 * 60) {
             throw new BadRequestException('consult.has_liked');
         }
 
-        return $consultLike;
+        return $like;
     }
 
 }
diff --git a/app/Validators/Course.php b/app/Validators/Course.php
index a97d5ee6..a149343f 100644
--- a/app/Validators/Course.php
+++ b/app/Validators/Course.php
@@ -8,6 +8,7 @@ use App\Exceptions\BadRequest as BadRequestException;
 use App\Library\Validators\Common as CommonValidator;
 use App\Models\Course as CourseModel;
 use App\Repos\Course as CourseRepo;
+use App\Repos\CourseFavorite as CourseFavoriteRepo;
 
 class Course extends Validator
 {
@@ -217,7 +218,7 @@ class Course extends Validator
         return $status;
     }
 
-    public function checkPublishAbility($course)
+    public function checkPublishAbility(CourseModel $course)
     {
         $courseRepo = new CourseRepo();
 
@@ -242,4 +243,17 @@ class Course extends Validator
         }
     }
 
+    public function checkIfFavorited($courseId, $userId)
+    {
+        $repo = new CourseFavoriteRepo();
+
+        $favorite = $repo->findCourseFavorite($courseId, $userId);
+
+        if ($favorite && time() - $favorite->create_time > 5 * 60) {
+            throw new BadRequestException('course.has_favorited');
+        }
+
+        return $favorite;
+    }
+
 }
diff --git a/app/Validators/Review.php b/app/Validators/Review.php
index 6e59bc4d..89755dfa 100644
--- a/app/Validators/Review.php
+++ b/app/Validators/Review.php
@@ -69,13 +69,13 @@ class Review extends Validator
     {
         $repo = new ReviewLikeRepo();
 
-        $reviewLike = $repo->findReviewLike($reviewId, $userId);
+        $like = $repo->findReviewLike($reviewId, $userId);
 
-        if ($reviewLike && time() - $reviewLike->create_time > 5 * 60) {
+        if ($like && time() - $like->create_time > 5 * 60) {
             throw new BadRequestException('review.has_liked');
         }
 
-        return $reviewLike;
+        return $like;
     }
 
 }
diff --git a/config/errors.php b/config/errors.php
index 173a04cd..4c5321da 100644
--- a/config/errors.php
+++ b/config/errors.php
@@ -112,6 +112,7 @@ $error['course.invalid_refund_expiry'] = '无效的退款期限';
 $error['course.invalid_publish_status'] = '无效的发布状态';
 $error['course.pub_chapter_not_found'] = '尚未发现已发布的课时';
 $error['course.pub_chapter_not_enough'] = '已发布的课时太少（小于30%）';
+$error['course.has_favorited'] = '你已收藏过该课程啦';
 
 /**
  * 话题相关
diff --git a/public/static/web/css/common.css b/public/static/web/css/common.css
index c075d058..8c8499fd 100644
--- a/public/static/web/css/common.css
+++ b/public/static/web/css/common.css
@@ -84,6 +84,12 @@
     bottom: 60px;
 }
 
+body {
+    display: flex;
+    flex-flow: column;
+    min-height: 100vh;
+}
+
 #header {
     left: 0;
     top: 0;
@@ -96,14 +102,15 @@
 #main {
     margin-top: 80px;
     margin-bottom: 30px;
-    min-height: 550px;
+    flex: 1;
 }
 
 #footer {
+    width: 100%;
     padding: 30px 0;
+    background: #474443;
     text-align: center;
     font-size: 12px;
-    background: #474443;
 }
 
 .logo {
@@ -137,11 +144,15 @@
     color: #fff;
 }
 
-.bottom-nav, .copyright {
+.bottom-nav {
     margin-bottom: 10px;
     line-height: 18px;
 }
 
+.copyright {
+    line-height: 18px;
+}
+
 .bottom-nav a, .copyright span, .copyright a {
     margin-right: 10px;
 }