diff --git a/app/api/controller/Gt.php b/app/api/controller/Gt.php
index 702bc7fd..dc06244c 100644
--- a/app/api/controller/Gt.php
+++ b/app/api/controller/Gt.php
@@ -261,7 +261,15 @@ MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwRUsPpbQPhBWrxFhG00k9VBgnHc7dCZyTQYI
     function ASCII($params=array()){
         ksort($params);
         reset($params);
-        $str = http_build_query($params,'','&amp');
+        $str = "";
+        foreach($params as $key=>$value){
+            if($key==0){
+                $str = $key."=".$value;
+            }else{
+                $str.= "&".$key."=".$value;
+            }
+        }
+//        $str = http_build_query($params,'','&amp');
         return $str;
     }
     public function sign($param,$key_pem)