diff --git a/app/helpers/bids_helper.rb b/app/helpers/bids_helper.rb
index 274775a53..103dbccfa 100644
--- a/app/helpers/bids_helper.rb
+++ b/app/helpers/bids_helper.rb
@@ -125,4 +125,14 @@ module BidsHelper
     end
     @users.count
   end
+
+  def im_watching_student_id? bid
+    people = []
+    people << bid.author
+    bid.join_in_contests.each do |jic|
+      people << jic.user
+    end
+    people.include?(User.current)
+  end
+
 end
\ No newline at end of file
diff --git a/app/views/bids/_list_projects.html.erb b/app/views/bids/_list_projects.html.erb
index e1b8815b0..6947f8ceb 100644
--- a/app/views/bids/_list_projects.html.erb
+++ b/app/views/bids/_list_projects.html.erb
@@ -152,7 +152,11 @@
 					<table width="100%">
 						<% if @bid.reward_type == 3 %>
 						<tr>
-							<td><%= l(:label_bidding_user_studentcode) %> : <%= b_project.user.user_extensions.student_id %></td>
+							<td>
+								<% if (im_watching_student_id? @bid) && user.user_extensions.identity.to_i.eql?(1) %>
+									<%= l(:label_bidding_user_studentcode) %> : <%= b_project.user.user_extensions.student_id %>
+								<% end %>
+							</td>
 						</tr>
 						<tr>							
 							<td><%= l(:label_bidding_user_homework) %> :
@@ -171,7 +175,11 @@
 							<%= b_project.user.lastname %><%= b_project.user.firstname %>
 							<% end %></strong>
 						<!-- added by bai 加入学号	 -->
-							<p><strong><%= l(:label_bidding_user_studentcode) %> ：<%= b_project.user.user_extensions.student_id%></strong></p>
+							<p><strong>
+								<% if (im_watching_student_id? @bid) && b_project.user.user_extensions.identity.to_i.eql?(1) %>
+									<%= l(:label_bidding_user_studentcode) %> : <%= b_project.user.user_extensions.student_id %>
+								<% end %>
+							</strong></p>
 						</td>
 						<!-- end -->
 						
diff --git a/app/views/bids/show_participator.html.erb b/app/views/bids/show_participator.html.erb
index 4a2bcab45..e19340ee2 100644
--- a/app/views/bids/show_participator.html.erb
+++ b/app/views/bids/show_participator.html.erb
@@ -3,56 +3,63 @@
 <div class="inf_user_image">
 	<% for temp in @bid.join_in_contests %>
 	<% user = temp.user %>
-	<ul class="list_watch"><li>
-<table width="660px" border="0" align="center">
-  <tr>
-  	<!-- modified by bai 显示人名全称-->
-    <td colspan="2" valign="top" width="50" ><%= link_to image_tag(url_to_avatar(user), :class => "avatar"), 
-                                                                                        user_path(user), 
-                                                                                        :title => "#{user.show_name}" %></td>   
-     <td><table width="580px" border="0">
-      <tr>
-        <td colspan="2" valign="top"><strong><%= content_tag "div", link_to(user.show_name, user_path(user)), :class => "project_avatar_name" , 
-                                                                                                  :title => "#{user.show_name}" %>
-         
-       <!-- added by bai    增加了学员的学号  -->
-        <%= l(:label_bidding_user_studentcode) %> ：<%= user.user_extensions.student_id%>
-        </td>
-        </tr>
-      <tr>
-      	<!-- modified by bai 区分课程与项目-->
-        <td colspan="2" width="580px" ><p class="font_description">
-			<% unless user.memberships.empty? %>
-			<% cond = Project.visible_condition(User.current) + "AND projects.project_type <> 1" %>
-			<% memberships = user.memberships.all(:conditions => cond) %>
-			<%= l(:label_x_contribute_to, :count => memberships.count) %>
-			<% for member in memberships %>
-			<%= link_to_project(member.project) %><%= (user.memberships.last == member) ? '' : '，' %>
-			<% end %>
-			<% end %>
-			</p>
-			
-		<!-- added by bai -->
-			<p class="font_description">
-				<% unless user.memberships.empty? %>
-			<% cond = Project.visible_condition(User.current) + "AND projects.project_type = 1" %>
-			<% memberships = user.memberships.all(:conditions => cond) %>
-			<%= l(:label_x_course_contribute_to, :count => memberships.count) %>
-			<% for member in memberships %>
-			<%= link_to_project(member.project) %><%= (user.memberships.last == member) ? '' : '，' %>
-			<% end %>
-			<% end %>
-			</p>
+	<ul class="list_watch">
+	<li>
+		<table width="660px" border="0" align="center">
+			<tr>
+				<!-- modified by bai 显示人名全称-->
+				<td colspan="2" valign="top" width="50" >
+					<%= link_to image_tag(url_to_avatar(user), :class => "avatar"), user_path(user), :title => "#{user.show_name}" %>
+				</td>
+				<td>
+					<table width="580px" border="0">
+						<tr>
+							<td colspan="2" valign="top"><%= content_tag "div", link_to(user.show_name, user_path(user)), :class => "project_avatar_name" , :title => "#{user.show_name}" %>
+								<!-- added by bai    增加了学员的学号  -->
+								<% if (im_watching_student_id? @bid) && user.user_extensions.identity.to_i.eql?(1) %>
+									<%= l(:label_bidding_user_studentcode) %> ：<%= user.user_extensions.student_id%>
+								<% end %>
+							</td>
+						</tr>
+						<tr>
+							<!-- modified by bai 区分课程与项目-->
+							<td colspan="2" width="580px" >
+							<p class="font_description">
+								<% unless user.memberships.empty? %>
+								<% cond = Project.visible_condition(User.current) + "AND projects.project_type <> 1" %>
+								<% memberships = user.memberships.all(:conditions => cond) %>
+								<%= l(:label_x_contribute_to, :count => memberships.count) %>
+								<% for member in memberships %>
+								<%= link_to_project(member.project) %><%= (user.memberships.last == member) ? '' : '，' %>
+								<% end %>
+								<% end %>
+							</p>
+
+							<!-- added by bai -->
+							<p class="font_description">
+								<% unless user.memberships.empty? %>
+								<% cond = Project.visible_condition(User.current) + "AND projects.project_type = 1" %>
+								<% memberships = user.memberships.all(:conditions => cond) %>
+								<%= l(:label_x_course_contribute_to, :count => memberships.count) %>
+								<% for member in memberships %>
+								<%= link_to_project(member.project) %><%= (user.memberships.last == member) ? '' : '，' %>
+								<% end %>
+								<% end %>
+							</p>
+							</td>
+						</tr>
+						<!-- end -->
+
+						<tr>        
+							<td width="200" align="right" class="font_lighter">
+								<%= l(:label_user_joinin) %><%= format_date(user.created_on) %>
+							</td>
+						</tr>
+				</table>
 			</td>
-        </tr>
-        <!-- end -->
-        
-      <tr>        
-        <td width="200" align="right" class="font_lighter"><%= l(:label_user_joinin) %><%= format_date(user.created_on) %>
-        </td>
-      </tr>
-    </table></td>
-  </tr>
-</table></li></ul>
-<% end %>
+		</tr>
+	</table>
+	</li>
+	</ul>
+	<% end %>
 </div>
\ No newline at end of file