微信接口：https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token= 入参： {     "touser": "omZuU5rCJ7HYxeucv6EmAs93nZa4",     "msgtype": "mpnews",     "mpnews": {         "media_id": "IC_LsC1HUSGsF7BuKfPu5zapSz4N0n-aquvFLBXsWn69lYIUVVQA7kxYl8zA2CVh"     } } 响应： {     "errcode": 40007,     "errmsg": "invalid media_id rid: 641a761d-60af4913-4f4ecf53" } media_id是已发布文档的article_id