Http request method: POST
https://api.weixin.qq.com/product/coupon/create?access_token=xxxxxxxxx 

{
    "type": 1,
    "name" : "Double 11 specials are 100-50,"  //length <= 10
    "discount_info" : 
    {
        "discount_condition" : 
        {
            "product_CNT  : 10,//Merchandise discount vouchers are filled out
            "product_ids" : //Product coupons fill out
            [
                1673110742,
                1673110743
            ],
            "product_price" : 100//Fill out the full reduced coupon
        },
        "discount_fee" : 50,//Full amount reduced
        "discount_num" : 5000//Discount coupon filling, conversion rules, such as 5000 = 5 discount, 7800 = 7.8 discount, the range is 1000-10000, and must be an integer of 100.
    },
    "ext_info" : 
    {
        "jump_product_id" : 1673110742,//Product coupons can be filled in, jump to receive them
        "notes" : "Note,"
        "valid_time" : 1673110742,  // valid_Valid when type = 1_info.start_Time is consistent, valid_Type = 2 when the business itself to fill in an absolute start time
        "invalid_time" : 1673110742 // valid_Valid when type = 1_info.end_Time is consistent, valid_Type = 2 when the business itself fills in an absolute end time
    },
    "promote_info" : 
    {
        "customize_channel" : "//Customize promotional channel, specific content " ,
        "promote_type" : 1     //Promotion Types, 1: In-store Promotion, 2: Custom Promotion Channels
    },
    "receive_info" : // Settings that allow users to collect coupons
    {
        "end_time" : 1673110742,
        "limit_num_one_person" : 1,
        "start_time" : 1673110742,
        "total_num" : 100
    },
    "valid_info" : 
    {
        "end_time" : 1673110742,        //Absolute entry into force starting time, valid_Required when type = 1
        "start_time" : 1673110742,      //The end date of absolute entry into force, valid_Required when type = 1
        "valid_day_num" : 1,            //Relative duration of entry into force, Starting with the time the user receives the coupon, valid_Required when type = 2
         "valid_type" : 1
    }
}

{
    "errcode": 0,
    "errmsg": "ok",
    "data": {
        "coupon_id": 111
    }
}