<xml>
    <ToUserName><![CDATA[toUser]]></ToUserName>
    <FromUserName><![CDATA[sys]]></FromUserName>
    <CreateTime>1403610513</CreateTime>
    <MsgType><![CDATA[event]]></MsgType>
    <Event><![CDATA[change_external_contact]]></Event>
    <ChangeType><![CDATA[msg_audit_approved]]></ChangeType>
    <UserID><![CDATA[zhangsan]]></UserID>
    <ExternalUserID><![CDATA[woAJ2GCAAABiuyujaWJHDDGi0mACHAAA]]></ExternalUserID>
    <WelcomeCode><![CDATA[WELCOMECODE]]></WelcomeCode>
</xml>
