修改

ThinkPHP/Library/Org/SumaPay/Request/Request.class.php

@@ -42,9 +42,9 @@ class Request
             'merchantCode' => $this->merchantCode,
             'totalBizType' => $this->totalBizType,
         ], $this->params, $this->getExtraData());
-        foreach ($params as $key => $value) {
+        /* foreach ($params as $key => $value) {
             $params[$key] = Encoding::convert($value, 'GBK');
-        }
+        } */
         $params[Sign::SIGN_KEY] = Sign::generate($params, $this->signFields, $this->secretKey);
         return $params;
     }