diff --git a/app/api/mobile/apis/new_comment.rb b/app/api/mobile/apis/new_comment.rb
index 0713a48a3..2c5ab7754 100644
--- a/app/api/mobile/apis/new_comment.rb
+++ b/app/api/mobile/apis/new_comment.rb
@@ -20,14 +20,20 @@ module Mobile
             #如果当前用户不存在
             openid = session[:wechat_openid]
             raise "无法获取到openid,请在微信中打开本页面" unless openid
-
             us = UsersService.new
             #login mail password
+            openid_length = openid.length
+
+            login = openid[0..10]+openid[openid_length-3..openid_length-1]
 
-            login = openid[0..3]+"***"+openid.last
+            name = openid[0..3]+"***"+openid.last
 
             user = us.register ({:login=>login, :mail=>login+"@163.com",
-                                 :password=>"12345678", :password_confirmation=>"12345678", :should_confirmation_password => true})
+                                 :password=>"12345678", :password_confirmation=>"12345678",
+                                 :should_confirmation_password => true})
+
+            user.update_attributes(:lastname=>name)
+
             raise user.errors.full_messages.first if user.new_record?
             UserWechat.create!(
                 openid: openid,
diff --git a/app/api/mobile/apis/users.rb b/app/api/mobile/apis/users.rb
index 30e4cc1f9..19cce07e7 100644
--- a/app/api/mobile/apis/users.rb
+++ b/app/api/mobile/apis/users.rb
@@ -67,6 +67,7 @@ module Mobile
             user[:password] = params[:password]
             user[:password_confirmation] = params[:password]
             user[:should_confirmation_password] = true
+            user[:lastname]=""
             user.save!
           else
             us = UsersService.new