diff --git a/app/manager/controller/UserFollow.php b/app/manager/controller/UserFollow.php
index 7926882..56dfa33 100644
--- a/app/manager/controller/UserFollow.php
+++ b/app/manager/controller/UserFollow.php
@@ -166,7 +166,7 @@ class UserFollow extends Controller
         foreach ($user_list as $info) {
             $info['last_pay_time'] = $info['pay_time'];
             $info['follow_status'] = $user_enum::$FollowStatus[$info['follow_status']];
-            $info['UserName'] = substr($info['LoginCode'], 0, 3) . '***' . substr($info['LoginCode'], -3);
+            $info['UserName'] = mb_substr($info['LoginCode'], 0, 3) . '***' . mb_substr($info['LoginCode'], -3);
             $info['all_amount'] = 0;
             $info['PrevMonthAmount'] = 0;
             $info['MonthAmount'] = 0;