https://api.mch.weixin.qq.com/pay/unifiedorder
<xml>
<nonce_str>HyxAlVXYX3FrSctqxzYFmsPys9zHM5nr</nonce_str>
<out_trade_no>30d271685c9b41cf9bfa69603de63fe2</out_trade_no>
<total_fee>100</total_fee>
<appid>wx0f033c</appid>
<sign>649CE7C3F06FF9465E</sign>
<trade_type>NATIVE</trade_type>
<attach>支付测试</attach>
<fee_type>CNY</fee_type>
<body>NATIVE支付测试</body>
<notify_url>http://www.pingxunzl.com/</notify_url>
<mch_id>1602064979</mch_id>
<sign_type>MD5</sign_type>
</xml>
