diff --git a/app/api/controller/Gt.php b/app/api/controller/Gt.php
index ff99acb0..8662fac5 100644
--- a/app/api/controller/Gt.php
+++ b/app/api/controller/Gt.php
@@ -260,7 +260,7 @@ MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwRUsPpbQPhBWrxFhG00k9VBgnHc7dCZyTQYI
     function ASCII($params=array()){
         ksort($params);
         reset($params);
-        $str = http_build_query($params,'','&');
+        $str = http_build_query($params,'','&amp');
         return $str;
     }
     public function sign($param,$key_pem)