不知道哪里出错,发送数据包如下：
{ "combine_out_trade_no": "20220712200250", "combine_mchid": "1604977470",
"combine_appid": "wx2b708d2c7d3d90ab", "scene_info": { "device_id": "POS1:123",
"payer_client_ip": "183.6.118.97" }, "sub_orders":
[{"mchid":"1604977470","attach":"\u88d5\u4e30","amount":{"total_amount":1,"currency":"CNY"},"out_trade_no":"fengpan_220220711144334","description":"\u6fc0\u6d3b\u4fdd\u8bc1\u91d1"},{"mchid":"1604977470","attach":"\u88d5\u4e30","amount":{"total_amount":1,"currency":"CNY"},"out_trade_no":"fengpan_220220711144300","description":"\u6fc0\u6d3b\u4fdd\u8bc1\u91d1"}],
"combine_payer_info": { "openid": "oYSoxuP3Pbe093tGoInhuTYvVUY8" },
"time_start": 2022-07-13T20:02:50+08:00", "time_expire":
2022-07-13T20:12:50+08:00", "notify_url":
"https://erp.yfdc.net/pay/example/notify.php"
}{"code":"SYSTEM_ERROR","message":"系统繁忙，请稍后重试"}
调用基础支付接口，返回：“系统繁忙，请稍后重试”（SYSTEM_ERROR）
请根据以下几点排查：
1、检查商户号和appid使用是否正确
2、检查请求地址是否调用错误，接口适用对象是否与商户号类型匹配
3、使用相同参数，稍后重新调用
4、请检查请求头当中Authorization的商户API证书序列号跟请求头的商户号是否匹配
请点击详情参考《基础支付-报错“系统繁忙，请稍后重试”》文档内容