<xml>
   <ToUserName><![CDATA[gh_2d62d*****0]]></ToUserName>
    <FromUserName><![CDATA[oa3LFuBvWb7*********]]></FromUserName>
    <CreateTime>1443838506</CreateTime>
    <MsgType><![CDATA[event]]></MsgType>
    <Event><![CDATA[card_sku_remind]]></Event>
    <CardId><![CDATA[pa3LFuAh2P65**********]]></CardId>
    <Detail><![CDATA[the card's quantity is equal to 0]]></Detail>
</xml>