diff --git a/app/models/course.rb b/app/models/course.rb
index 24e955d15..0194a2a9d 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -1,7 +1,6 @@
 require 'elasticsearch/model'
 class Course < ActiveRecord::Base
   include Redmine::SafeAttributes
-  include ApplicationHelper
 
   STATUS_ACTIVE     = 1
   STATUS_CLOSED     = 5
@@ -71,7 +70,7 @@ class Course < ActiveRecord::Base
   validates_length_of :description, :maximum => 10000
   before_save :self_validate
   # 公开课程变成私有课程，所有资源都变成私有
-  after_update :update_files_public,:update_course_ealasticsearch_index,:update_activity
+  after_update :update_files_public,:update_course_ealasticsearch_index
   after_create :create_board_sync, :act_as_course_activity, :act_as_course_message,:create_course_ealasticsearch_index
   before_destroy :delete_all_members,:delete_course_ealasticsearch_index
 
@@ -429,12 +428,6 @@ class Course < ActiveRecord::Base
     end
   end
 end
-#动态的更新
-def update_activity
-  update_course_activity(self.class, self.id)
-  update_user_activity(self.class, self.id)
-  update_org_activity(self.class, self.id)
-end
 
 # Delete the previous articles index in Elasticsearch
 # Course.__elasticsearch__.client.indices.delete index: Course.index_name rescue nil
diff --git a/app/views/organizations/_org_course_create.html.erb b/app/views/organizations/_org_course_create.html.erb
index a5544ab07..dc1e0ee81 100644
--- a/app/views/organizations/_org_course_create.html.erb
+++ b/app/views/organizations/_org_course_create.html.erb
@@ -17,13 +17,9 @@
       <div class="homepagePostTitle break_word" >
         <%= link_to activity.name, course_path(activity.id,:host=>Setting.host_course), :class => "postGrey" %>
       </div>
-      <div class="homepagePostDate fl">
+      <div class="homepagePostDate">
         创建时间：<%= format_time(activity.created_at) %>
       </div>
-      <div class="homepagePostDate fl ml15">
-        更新时间：<%= format_time(CourseActivity.where("course_act_type='#{activity.class}' and course_act_id =#{activity.id}").first.updated_at) %>
-      </div>
-      <div class="cl"></div>
       <div class="homepagePostSetting" id="act-<%= user_activity_id %>" style="visibility: hidden">
         <ul>
           <li class="homepagePostSettingIcon">
diff --git a/app/views/organizations/_project_create.html.erb b/app/views/organizations/_project_create.html.erb
index 6b45a2a13..b68b7ceeb 100644
--- a/app/views/organizations/_project_create.html.erb
+++ b/app/views/organizations/_project_create.html.erb
@@ -19,13 +19,9 @@
       <div class="homepagePostTitle break_word" >
         <%= link_to project.name, project_path(project.id,:host=>Setting.host_course), :class => "postGrey" %>
       </div>
-      <div class="homepagePostDate fl">
+      <div class="homepagePostDate">
         创建时间：<%= format_time(project.created_on) %>
       </div>
-      <div class="homepagePostDate fl ml15">
-        更新时间：<%= format_time(ForgeActivity.where("forge_act_type='ProjectCreateInfo' and forge_act_id =#{project.id}").first.updated_at) %>
-      </div>
-      <div class="cl"></div>
       <div class="homepagePostSetting" id="act-<%= user_activity_id %>" style="visibility: hidden">
         <ul>
           <li class="homepagePostSettingIcon">
diff --git a/app/views/projects/_project_create.html.erb b/app/views/projects/_project_create.html.erb
index f7319f466..ef0c7c4c3 100644
--- a/app/views/projects/_project_create.html.erb
+++ b/app/views/projects/_project_create.html.erb
@@ -19,13 +19,9 @@
       <div class="homepagePostTitle break_word" >
         <%= link_to project.name, project_path(project.id,:host=>Setting.host_course), :class => "postGrey" %>
       </div>
-      <div class="homepagePostDate fl">
+      <div class="homepagePostDate">
         创建时间：<%= format_time(project.created_on) %>
       </div>
-      <div class="homepagePostDate fl ml15">
-        更新时间：<%= format_time(ForgeActivity.where("forge_act_type='ProjectCreateInfo' and forge_act_id =#{project.id}").first.updated_at) %>
-      </div>
-      <div class="cl"></div>
       <div class="homepagePostSetting" id="act-<%= user_activity_id %>" style="visibility: hidden">
         <ul>
           <li class="homepagePostSettingIcon">
diff --git a/app/views/users/_course_create.html.erb b/app/views/users/_course_create.html.erb
index a5544ab07..dc1e0ee81 100644
--- a/app/views/users/_course_create.html.erb
+++ b/app/views/users/_course_create.html.erb
@@ -17,13 +17,9 @@
       <div class="homepagePostTitle break_word" >
         <%= link_to activity.name, course_path(activity.id,:host=>Setting.host_course), :class => "postGrey" %>
       </div>
-      <div class="homepagePostDate fl">
+      <div class="homepagePostDate">
         创建时间：<%= format_time(activity.created_at) %>
       </div>
-      <div class="homepagePostDate fl ml15">
-        更新时间：<%= format_time(CourseActivity.where("course_act_type='#{activity.class}' and course_act_id =#{activity.id}").first.updated_at) %>
-      </div>
-      <div class="cl"></div>
       <div class="homepagePostSetting" id="act-<%= user_activity_id %>" style="visibility: hidden">
         <ul>
           <li class="homepagePostSettingIcon">
diff --git a/app/views/users/_project_create.html.erb b/app/views/users/_project_create.html.erb
index ae25312f3..0e35bca25 100644
--- a/app/views/users/_project_create.html.erb
+++ b/app/views/users/_project_create.html.erb
@@ -19,13 +19,9 @@
       <div class="homepagePostTitle break_word" >
         <%= link_to project.name, project_path(project.id,:host=>Setting.host_course), :class => "postGrey" %>
       </div>
-      <div class="homepagePostDate fl">
+      <div class="homepagePostDate">
         创建时间：<%= format_time(project.created_on) %>
       </div>
-      <div class="homepagePostDate fl ml15">
-        更新时间：<%= format_time(ForgeActivity.where("forge_act_type='ProjectCreateInfo' and forge_act_id =#{project.id}").first.updated_at) %>
-      </div>
-      <div class="cl"></div>
       <div class="homepagePostSetting" id="act-<%= user_activity_id %>" style="visibility: hidden">
         <ul>
           <li class="homepagePostSettingIcon">