diff --git a/wx/V3/WxV3PaymentTait.php b/wx/V3/WxV3PaymentTait.php
index 8443b65..61026d1 100644
--- a/wx/V3/WxV3PaymentTait.php
+++ b/wx/V3/WxV3PaymentTait.php
@@ -54,7 +54,7 @@ trait WxV3PaymentTait
         $client->withAddedHeader('Authorization', $sign)
                ->withContentType('application/json')->withAddedHeader('User-Agent', 'application/json')
                ->withAddedHeader("Accept", "*/*");
-        if (empty($json)) {
+        if (!empty($json)) {
             $client->withBody($json);
         }
         $proxyHost = $this->getPayConfig()->getProxyHost();
@@ -77,8 +77,10 @@ trait WxV3PaymentTait
 
         $sign = $this->signature('POST', '/v3/pay/transactions/out-trade-no/' . $orderNo . '?mchid=' . $config->pay->wx->mchId, "");
 
+        var_dump($sign);
+
         $client = $this->createClient($sign, "");
-        $client->get('/v3/pay/transactions/out-trade-no/' . $orderNo, ['mchid' => $config->pay->wx->mchId]);
+        $client->get('/v3/pay/transactions/out-trade-no/' . $orderNo . '?mchid=' . $config->pay->wx->mchId);
         $client->close();
 
         $json = json_decode($client->getBody(), TRUE);