diff --git a/app/controllers/admin/announcements_controller.rb b/app/controllers/admin/announcements_controller.rb
index 97f16bd..7b2eda2 100644
--- a/app/controllers/admin/announcements_controller.rb
+++ b/app/controllers/admin/announcements_controller.rb
@@ -53,21 +53,6 @@ class Admin::AnnouncementsController < OrbitAdminController
     @table_feed_fields = ["announcement.time", "announcement.comment", "announcement.account","ip","is_hidden"]
     @comments = @bulletin.bulletin_comments.reverse rescue []
   end
-  def http_request(http, request)
-    response = http.request(request)
-    if response.code.to_i == 301 || response.code.to_i == 302
-      location = response["location"]
-      new_uri = URI(location)
-      http = Net::HTTP.new(new_uri.host, new_uri.port)
-      if location.include?('https')
-        http.use_ssl = true
-        http.verify_mode = OpenSSL::SSL::VERIFY_NONE
-      end
-      request.instance_variable_set(:@path, new_uri.path)
-      response = http_request(http, request)
-    end
-    response
-  end
   def index
     Bulletin.remove_expired_status
     @tags = @module_app.tags
@@ -329,29 +314,7 @@ class Admin::AnnouncementsController < OrbitAdminController
     bulletin.save
     build_email(bulletin,I18n.locale)
     Thread.new do
-      begin
-        related_feeds = bulletin.get_related_feeds.select{|feed| feed.remote_urls.count != 0}
-        if related_feeds.count != 0
-          bulletin_data = bulletin.get_data
-          tmp_data = {'type'=>'create', 'data'=>[bulletin_data.to_json]}
-          request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
-          related_feeds.each do |feed|
-            tmp_data['uid'] = feed.uid
-            request.body = tmp_data.to_json
-            feed.remote_urls.each do |remote_url|
-              uri = URI(remote_url)
-              http_req = Net::HTTP.new(uri.host, uri.port)
-              if remote_url.include?('https')
-                http_req.use_ssl = true
-                http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
-              end
-              response = http_request( http_req , request )
-            end
-          end
-        end
-      rescue => e
-        puts [e.to_s, e.backtrace]
-      end
+      bulletin.notify_feed("create")
     end
     #BulletinFeed.create_feed_cache(bulletin)
     redirect_to admin_announcements_path
@@ -439,25 +402,7 @@ class Admin::AnnouncementsController < OrbitAdminController
     end
     build_email(bulletin,I18n.locale)
     Thread.new do
-      related_feeds = bulletin.get_related_feeds.select{|feed| feed.remote_urls.count != 0}
-      if related_feeds.count != 0
-        bulletin_data = bulletin.get_data
-        tmp_data = {'type'=>'update', 'data'=>[bulletin_data.to_json]}
-        request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
-        related_feeds.each do |feed|
-          tmp_data['uid'] = feed.uid
-          request.body = tmp_data.to_json
-          feed.remote_urls.each do |remote_url|
-            uri = URI(remote_url)
-            http_req = Net::HTTP.new(uri.host, uri.port)
-            if remote_url.include?('https')
-              http_req.use_ssl = true
-              http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
-            end
-            response = http_request( http_req , request )
-          end
-        end
-      end
+      bulletin.notify_feed("update")
     end
     #BulletinFeed.create_feed_cache(bulletin)
     now_bulletin_page = Bulletin.where(:title.ne => "",:is_preview.in=>[false,nil])
@@ -467,26 +412,9 @@ class Admin::AnnouncementsController < OrbitAdminController
   end
 
   def destroy
-    related_feeds = @bulletin.get_related_feeds.select{|feed| feed.remote_urls.count != 0}
     @bulletin.destroy
     Thread.new do
-      if related_feeds.count != 0
-        tmp_data = {'type'=>'destroy', 'data'=>[@bulletin.uid]}
-        request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
-        related_feeds.each do |feed|
-          tmp_data["uid"] = feed.uid
-          request.body = tmp_data.to_json
-          feed.remote_urls.each do |remote_url|
-            uri = URI(remote_url)
-            http_req = Net::HTTP.new(uri.host, uri.port)
-            if remote_url.include?('https')
-              http_req.use_ssl = true
-              http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
-            end
-            response = http_request( http_req , request )
-          end
-        end
-      end
+      @bulletin.notify_feed("destroy")
     end
     redirect_to admin_announcements_path
   end
@@ -495,31 +423,7 @@ class Admin::AnnouncementsController < OrbitAdminController
     if params[:ids]
       Bulletin.any_in(:uid => params[:ids]).destroy_all
       Thread.new do
-        all_feeds = BulletinFeed.all.select{|feed| feed.remote_urls.count != 0}
-        if all_feeds.count != 0
-          tmp_data = {'type'=>'destroy'}
-          request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
-          all_feeds.each do |feed|
-            feed_uid = feed.uid
-            feed_cache = BulletinFeedCache.where(:uid=>feed_uid).first
-            if feed_cache
-              tmp_data['uid'] = feed_uid
-              tmp_data['data'] = params[:ids] & JSON.parse(feed_cache.content)["announcements"].map{|a| a["id"]}
-              request.body = tmp_data.to_json
-              if tmp_data['data'].count != 0
-                feed.remote_urls.each do |remote_url|
-                  uri = URI(remote_url)
-                  http_req = Net::HTTP.new(uri.host, uri.port)
-                  if remote_url.include?('https')
-                    http_req.use_ssl = true
-                    http_req.verify_mode = OpenSSL::SSL::VERIFY_NONE
-                  end
-                  response = http_request( http_req , request )
-                end
-              end
-            end
-          end
-        end
+        Bulletin.notify_feed_delete(params[:ids])
       end
     end
     redirect_to admin_announcements_path
diff --git a/app/models/bulletin.rb b/app/models/bulletin.rb
index e1c5b08..0f6b13d 100644
--- a/app/models/bulletin.rb
+++ b/app/models/bulletin.rb
@@ -407,12 +407,14 @@ class Bulletin
     self.tags.each do |tag|
       if !tag_ids.include?(tag.id.to_s)
         tag_ids << tag.id.to_s
+        tag_names << {"name_translations" => tag.name_translations}
       end
       a["tags"] << {"name_translations" => tag.name_translations}
     end
     cat = self.category
     if (!category_ids.include?(cat.id.to_s) rescue false)
       category_ids << cat.id.to_s
+      category_titles << {"title_translations" => cat.title_translations}
     end
     a["category"] = {"title_translations" => (cat.title_translations rescue {})}
     self.bulletin_links.each do |bl|
@@ -433,4 +435,69 @@ class Bulletin
   def get_related_feeds
     related_feeds = BulletinFeed.any_of({:category_ids=>self.category_id.to_s}, {:tag_ids.in=>self.tag_ids.map(&:to_s)}).to_a
   end
+  def notify_feed(type="create")
+    related_feeds = self.get_related_feeds.select{|feed| feed.remote_urls.count != 0}
+    if related_feeds.count != 0
+      bulletin_data = self.get_data
+      if type == "destroy"
+        tmp_data = {'type'=>'destroy', 'data'=>[self.uid]}
+      else
+        tmp_data = {'type'=>type, 'data'=>[bulletin_data.to_json]}
+      end
+      request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
+      related_feeds.each do |feed|
+        tmp_data['uid'] = feed.uid
+        request.body = tmp_data.to_json
+        feed.remote_urls.each do |remote_url|
+          uri = URI(remote_url)
+          http_req = Net::HTTP.new(uri.host, uri.port)
+          if remote_url.include?('https')
+            http_req.use_ssl = true
+          end
+          response = self.class.http_request( http_req , request )
+        end
+      end
+    end
+  end
+  def self.notify_feed_delete(ids)
+    all_feeds = BulletinFeed.all.select{|feed| feed.remote_urls.count != 0}
+    if all_feeds.count != 0
+      tmp_data = {'type'=>'destroy'}
+      request = Net::HTTP::Post.new('/xhr/feeds/notify_change', 'Content-Type' => 'application/json')
+      all_feeds.each do |feed|
+        feed_uid = feed.uid
+        feed_cache = BulletinFeedCache.where(:uid=>feed_uid).first
+        if feed_cache
+          tmp_data['uid'] = feed_uid
+          tmp_data['data'] = ids & JSON.parse(feed_cache.content)["announcements"].map{|a| a["id"]}
+          request.body = tmp_data.to_json
+          if tmp_data['data'].count != 0
+            feed.remote_urls.each do |remote_url|
+              uri = URI(remote_url)
+              http_req = Net::HTTP.new(uri.host, uri.port)
+              if remote_url.include?('https')
+                http_req.use_ssl = true
+              end
+              response = self.http_request( http_req , request )
+            end
+          end
+        end
+      end
+    end
+  end
+  def self.http_request(http, request)
+    response = http.request(request)
+    if response.code.to_i == 301 || response.code.to_i == 302
+      location = response["location"]
+      new_uri = URI(location)
+      http = Net::HTTP.new(new_uri.host, new_uri.port)
+      if location.include?('https')
+        http.use_ssl = true
+        http.verify_mode = OpenSSL::SSL::VERIFY_NONE
+      end
+      request.instance_variable_set(:@path, new_uri.path)
+      response = self.http_request(http, request)
+    end
+    response
+  end
 end
diff --git a/app/views/announcement_feeds/rssfeed.rss.builder b/app/views/announcement_feeds/rssfeed.rss.builder
index a4c7219..8321c53 100644
--- a/app/views/announcement_feeds/rssfeed.rss.builder
+++ b/app/views/announcement_feeds/rssfeed.rss.builder
@@ -2,7 +2,7 @@ xml.instruct! :xml, :version => "1.0"
 xml.rss :version => "2.0" do
   xml.channel do
     xml.title @bf.title
-    xml.link "/xhr/announcements/rssfeed/73999228.rss"
+    xml.link "/xhr/announcements/rssfeed/#{@bf.uid}.rss"
     
     for announcement in @announcements
       xml.item do
diff --git a/lib/announcement/engine.rb b/lib/announcement/engine.rb
index a3f7b16..65c574d 100644
--- a/lib/announcement/engine.rb
+++ b/lib/announcement/engine.rb
@@ -98,6 +98,13 @@ module Announcement
         rescue => e
           puts ['there_was_no_show_option_method',e]
         end
+        begin
+          avoid_page_cache AnnsCache
+          avoid_page_cache BulletinFeedCache
+          avoid_page_cache BulletinFeed
+        rescue => e
+          puts ["avoid_page_cache", e.to_s]
+        end
         side_bar do
           head_label_i18n 'announcement.announcement', icon_class: "icons-megaphone"
           available_for "users"
diff --git a/lib/bulletin_model/cache.rb b/lib/bulletin_model/cache.rb
index 355e086..569461a 100644
--- a/lib/bulletin_model/cache.rb
+++ b/lib/bulletin_model/cache.rb
@@ -11,15 +11,17 @@ module BulletinModel
       if self.class == Bulletin
         @tag_ids = self.tag_ids
         @org_tag_ids = self.org_tag_ids
+        @category_id = self.category_id
+        @org_category_id = self.org_category_id
       end
     end
     def do_before_save
       if self.class == SubPart
-        AnnsCache.where(parent_id: self.id).delete
+        AnnsCache.where(parent_id: /^#{self.id}/).delete
       elsif self.class == Bulletin || (self.class == Page && self.module == "announcement")
         if self.class == Bulletin
           tmp_tag_ids = (Array(@tag_ids) + Array(@org_tag_ids)).uniq
-          tmp_cat_ids = (Array(self.category_id) + Array(self.org_category_id)).uniq
+          tmp_cat_ids = (Array(@category_id) + Array(@org_category_id)).uniq
           Thread.new do
             BulletinFeedCache.where(:uid.in => BulletinFeed.any_of([{:tag_ids.in => tmp_tag_ids.collect{|v| v.to_s}},{:category_ids.in => tmp_cat_ids.collect{|v| v.to_s}}]).pluck(:uid)).each do |cache|
               cache.regenerate