diff --git a/app/helpers/admin/announcements_helper.rb b/app/helpers/admin/announcements_helper.rb
index e13688a..a174cb9 100644
--- a/app/helpers/admin/announcements_helper.rb
+++ b/app/helpers/admin/announcements_helper.rb
@@ -6,7 +6,7 @@ module Admin::AnnouncementsHelper
   def page_for_bulletin(bulletin)
     ann_page = nil
     pages = Page.where(:module=>'announcement')
-    
+
     pages.each do |page|
       if page.categories.count ==1
         if page.categories.include?(bulletin.category.id.to_s)
@@ -129,7 +129,7 @@ module Admin::AnnouncementsHelper
         mail = Email.new(:mail_to => email, :mail_subject => "Announcement rejected公告未通過 : #{announcement.title}.", :template => "email/announcement_email.html.erb", :template_data => {"html" => datatosend})
         mail.deliver rescue nil
       end
-    end 
+    end
   end
 
   def send_notification_mail_to_managers(announcement, type)
@@ -163,7 +163,7 @@ module Admin::AnnouncementsHelper
   def send_email(name, useremail, announcement, type)
     url = "http://#{request.host_with_port}/admin/announcements?url=#{page_for_bulletin(announcement).sub("http://" + request.host_with_port, "")}&id=#{announcement.id}"
 
-    case type  
+    case type
     when "approval"
       datatosend = "<h3>#{t("announcement.approval_mail_hi", :name => name)},</h3><p>#{t("announcement.submitted_new_announcement", :poster => current_user.name)}<br /><br />#{t("announcement.approval_announcement_title")} : #{announcement.title} <br /> #{t("announcement.click_here_to_see")} : <a href='#{url}'> #{url} </a></p>"
     when "reapproval"
@@ -216,40 +216,46 @@ module Admin::AnnouncementsHelper
 
     doc.xpath("//channel").each do|channel_data|
       channel_data.xpath('//item').each  do|itme|
-        bu = Bulletin.new  
-        bu.approved = true
-        bu.title_translations = {"en" => itme.xpath('title').text, "zh_tw" => itme.xpath('title').text}
-        bu.text_translations  = {"en" => itme.xpath('content:encoded').text, "zh_tw" => itme.xpath('content:encoded').text}
-        bu.postdate = itme.xpath('wp:post_date').text
-                
-        itme.xpath('category').each do |i_cate|
-          if i_cate["domain"].to_s == "category"
 
-            cat = @module_app.categories.where(:title => i_cate.text.to_s).first rescue nil
-            if cat.nil?
-              cat = Category.new
-              cat.module_app  = @module_app
-              cat.title_translations = {"en" => i_cate.text.to_s, "zh_tw" => i_cate.text.to_s}
-              cat.save
-            end            
+        bu = Bulletin.where(:rss2_sn =>  itme.xpath('wp:post_id').text ).first rescue nil
+        if bu.nil?
+            bu = Bulletin.new
+            bu.approved = true
+            bu.rss2_sn            = itme.xpath('wp:post_id').text
+            bu.title_translations = {"en" => itme.xpath('title').text, "zh_tw" => itme.xpath('title').text}
+            bu.text_translations  = {"en" => itme.xpath('content:encoded').text, "zh_tw" => itme.xpath('content:encoded').text}
+            bu.postdate           = itme.xpath('wp:post_date').text
 
-            bu.category = cat
+            itme.xpath('category').each do |i_cate|
+              if i_cate["domain"].to_s == "category"
 
-          elsif i_cate["domain"].to_s == "post_tag"
-            
-            tag = Tag.where(:name =>  i_cate.text.to_s )             
-            if tag.nil? == false
-              tag = Tag.new                    
-              tag.name_translations = {"en" => i_cate.text.to_s, "zh_tw" => i_cate.text.to_s}                          
-              tag.module_app_ids << @module_app.id              
-              tag.save
-            end 
+                  cat = @module_app.categories.where(:title => i_cate.text.to_s).first rescue nil
+                  if cat.nil?
+                    cat = Category.new
+                    cat.module_app  = @module_app
+                    cat.title_translations = {"en" => i_cate.text.to_s, "zh_tw" => i_cate.text.to_s}
+                    cat.save
+                  end
+                  bu.category = cat
 
-            bu.tags=tag
-          end                         
-        end         
-        bu.save         
-      end  
+              elsif i_cate["domain"].to_s == "post_tag"
+
+                  tag = Tag.where(:name =>  i_cate.text.to_s ).first rescue nil
+                  if tag.nil?
+                    tag = Tag.new
+                    tag.name_translations = {"en" => i_cate.text.to_s, "zh_tw" => i_cate.text.to_s}
+                    tag.module_app_ids << @module_app.id
+                    tag.save
+                  end
+
+                  bu.tags = tag
+              end
+            end
+
+        bu.save
+        end
+
+      end
     end
     File.delete(xmlfile)
   end