diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 5edaf63e5..d528094d6 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -6,6 +6,23 @@ class WechatsController < ActionController::Base
 
   # default text responder when no other match
   on :text do |request, content|
+    if content.size == 6
+      #邀请码
+      if join_class(content)
+        root_url = "http://wechat.trustie.net"
+
+        news = (1..1).each_with_object([]) { |n, memo| memo << { title: '恭喜您成功加入班级,开始学习吧!',
+                                                                 content: "课程名称: 数据结构\n班级名称: 数据结构A班\n任课老师: 尹刚\n进入班级,和小伙伴愉快的学习吧!0"} }
+        request.reply.news(news) do |article, n, index| # article is return object
+          url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=#{Wechat.config.appid}&redirect_uri=#{root_url+'/wechat/user_activities#myclass'}&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect"
+          pic_url = "#{Setting.protocol}://#{Setting.host_name}/images/class.jpg"
+          article.item title: "#{n[:title]}",
+                       description: n[:content],
+                       pic_url: pic_url,
+                       url: url
+        end
+      end
+    end
     request.reply.text "您的意见已收到，感谢您的反馈！" # Just echo
   end
 
@@ -133,7 +150,7 @@ class WechatsController < ActionController::Base
     unless uw
       sendBind(request)
     else
-      request.reply.text "请直接回复班级邀请码 (不区分大小写):"
+      request.reply.text "请直接回复6位班级邀请码\n(不区分大小写):"
     end
   end
 
@@ -165,6 +182,10 @@ class WechatsController < ActionController::Base
     end
   end
 
+  def join_class(content)
+    true
+  end
+
   ###  controller method
   module Controllers
     def get_open_id
diff --git a/public/images/wechat/class.jpg b/public/images/wechat/class.jpg
new file mode 100644
index 000000000..e3eebb977
Binary files /dev/null and b/public/images/wechat/class.jpg differ