说明 / 示例
"app_id": "wxb3a3e4a812345835",
"app_secret": "e06f2a1af28cbb389d5c40c7b5bdd01b",
"mch_id": "1602526480",
"mch_key": "cf97645e1a99e9e8bdeb0bbbfa9c737f",
"min_price": "100", 满额包邮
"yf": "10.00", 不满额的时候的邮费
"bargain_min_per": 0, 单次砍价最小额度
"bargain_max_per": 4, 单次砍价最高额度
"bargain_end_per": 90 砍价到百分之多少算砍价成功
"new_remission":10 新人减免