diff --git a/app/controllers/trainings_controller.rb b/app/controllers/trainings_controller.rb
index 930efbb7..dfb7c716 100644
--- a/app/controllers/trainings_controller.rb
+++ b/app/controllers/trainings_controller.rb
@@ -5,10 +5,10 @@ class TrainingsController < ApplicationController
 
   skip_before_filter :verify_signature, only: [:show, :create, :test]
 
-  # ROOT_URL = ENV["wechat_url"] || "#{Setting.protocol}://#{Setting.host_name}"
-  #
-  # before_filter :authenticate, except: [:auth, :auth_callback, :pay_callback]
-  #
+  ROOT_URL = ENV["wechat_url"] || "#{Setting.protocol}://#{Setting.host_name}"
+
+  before_filter :authenticate, except: [:auth, :auth_callback, :pay_callback]
+
   before_filter :find_tag_id
 
   before_filter :find_training, only: [:show, :test]