diff --git a/app/controllers/oauth/acge_controller.rb b/app/controllers/oauth/acge_controller.rb
index efa5cca08..6f7c82039 100644
--- a/app/controllers/oauth/acge_controller.rb
+++ b/app/controllers/oauth/acge_controller.rb
@@ -30,7 +30,7 @@ class Oauth::AcgeController < Oauth::BaseController
 
             return
           else
-            username = uid[0..7]
+            username = uid
             password = SecureRandom.hex(4)
             reg_result = autologin_register(username, email, password, 'acge', phone, name)
             existing_rows = CSV.read("public/操作系统大赛用户信息.csv")