1.接口:https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/chapter10_1_4.shtml

2.请求url:https://api.mch.weixin.qq.com/v3/apply4subject/applyment/merchants/1628711090/state

3.返回:

{"code":"PARAM_ERROR","detail":{"location":"uri_template","value":10},"message":"输入源“/uri_template/sub_mchid”映射到值字段“特约商户号”字符串规则校验失败，字符数 10，大于最大值 9"}

服务商特约商户进件返回的商户号就是10位的，这怎么就是9位的了?