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"

 }