~~~[api] post:https://ychd.nineopen.com/wx/pay fee#交易金额（单位：元） openid# <<< success { "state": 200, "timeStamp": "1550110834", "nonceStr": "cVXoUOkVoTMNULigofQcByyXGpwIObcS", "signType": "MD5", "package": "prepay_id=wx141020394384884998931bca4019317917", "paySign": "564FAE3DFD6DEFF79515112DC2F5C2FD", "out_trade_no": "35308f06b83087c0c58278d1c353135f" } <<< error { "state": 0, "text": "错误", "RETURN_CODE": "FAIL", "RETURN_MSG": "openid参数长度有误" } ~~~