diff --git a/app/models/course.rb b/app/models/course.rb
index 45830c719..75bac905c 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -36,7 +36,7 @@ class Course < ActiveRecord::Base
 
   validates_presence_of :password, :term,:name
   validates_format_of  :class_period, :with =>/^[1-9]\d*$/
-  #validates_format_of  :name,:with =>/^[a-zA-Z0-9_\u4e00-\u9fa5]+$/
+  validates_format_of  :name,:with =>/^[a-zA-Z0-9_\u4e00-\u9fa5]+$/
 
   before_save :self_validate
   after_create :create_board_sync
diff --git a/app/views/welcome/contest.html.erb b/app/views/welcome/contest.html.erb
index b48b5828a..ce2450268 100644
--- a/app/views/welcome/contest.html.erb
+++ b/app/views/welcome/contest.html.erb
@@ -166,7 +166,7 @@
 				</div>
 				
 				<div  style="float: left;margin:5px; margin-left: 12px; margin-bottom: 2px; width: 380px;">
-					<span class='font_lighter' title =<%=contest.description.to_s%>><%=contest.description.to_s%></span>
+					<span class='font_lighter' title ='<%=contest.description%>'><%=contest.description.truncate(100, omission: '...')%></span>
 				</div><br />
 				
 				<div style="padding-left: 57px; clear: left;">
diff --git a/app/views/welcome/index.html.erb b/app/views/welcome/index.html.erb
index 586817c40..deeacb322 100644
--- a/app/views/welcome/index.html.erb
+++ b/app/views/welcome/index.html.erb
@@ -73,7 +73,7 @@
 					 (<%= link_to "#{projectCount(project)}人", project_member_path(project) ,:course =>'0' %>) 			
 				</div>
 				<div  style=" float: left;margin:5px; margin-left: 10px; width: 380px;">
-					<span class='font_lighter' title =<%=project.description.to_s%>><%=project.description%></span>
+					<span class='font_lighter' title ='<%=project.short_description%>'><%=project.description.truncate(100, omission: '...')%></span>
 				</div>
 				<div >
                   <%# issue_count = project.issues.count %>