严格按照开发文档中的参数传输的 {  "combine_appid":"wx40a8e651d2df059a",  "combine_out_trade_no": "2",  "combine_mchid": "1",  "sub_orders": [    {      "mchid": "1",      "attach": "深圳分店",      "amount": {        "total_amount": 1,        "currency": "CNY"      },      "out_trade_no": "20200507123456",      "sub_mch_id": "1",      "detail": "1",      "description": "腾讯充值中心-QQ会员充值"    }  ],  "combine_payer_info": {    "openid": "2"  },  "time_start": "2020-05-07T16:10:60+08:00",  "time_expire": "2019-12-31T15:59:60+08:00",  "notify_url": "https://192.168.72.23:8081"  }