diff --git a/app/views/welcome/course.html.erb b/app/views/welcome/course.html.erb
index 476471897..256a976c4 100644
--- a/app/views/welcome/course.html.erb
+++ b/app/views/welcome/course.html.erb
@@ -195,7 +195,6 @@
   </h3>
   <span style="margin-top: -20px;float: right; display: block;"><%= link_to "更多>>", forums_path %></span>
   <% topics = find_new_forum_topics(10) %>
-  <%# cache topics.maximum(:created_at) do%>
   <div class="d-p-projectlist-box">
     <ul class="d-p-projectlist">
 
@@ -233,8 +232,7 @@
 
     </ul>
   </div>
-  <%# end %>
 </div>
 <div class="clearfix"></div>
 
-<%= render partial: 'link_to_another' %>
\ No newline at end of file
+<%= render partial: 'link_to_another' %>