调用车主状态查询接口返回如下信息，烦请知情人士解答，万分感谢 

<xml>

    <return_code> <![CDATA[ SUCCESS]]> </return_code>

    <return_msg> <![CDATA[ OK]]> </return_msg>

    <appid><![CDATA[ wxcb5e916420e69344 ]]></appid>

    <mch_id><![CDATA[ 1530168881]]></mch_id>

    <nonce_str><![CDATA[ CAJQEImwHKbRfJvs3wnVFJHcd7wkbRkK ]]></nonce_str>

    <sign> <![CDATA[ 225257091953A86725DD4F377E68D64E]]></sign>

    <result_code> <![CDATA[ FAIL]]></result_code>

    <err_code> <![CDATA[ INVALID_REQUEST ]]>

    </err_code><err_code_des><![CDATA[ Permission denied ]]>

</err_code_des></xml>