.

app/controllers/wechats_controller.rb

@@ -20,11 +20,10 @@ class WechatsController < ActionController::Base
                        description: n[:content],
                        pic_url: pic_url,
                        url: url
-        end
+        end and return
       else
-        request.reply.text "课程邀请码不正确"
+        request.reply.text "课程邀请码不正确" and return
       end
-      return
     end
     request.reply.text "您的意见已收到，感谢您的反馈！" # Just echo
   end