WeChat.ServerMessage.XmlMessage.reply_news

You're seeing just the function reply_news, go back to WeChat.ServerMessage.XmlMessage module for more information.
Link to this function

reply_news(to_openid, from_wx_no, timestamp, article_items)

回复图文消息 - 官方文档

<xml>
  <ToUserName><![CDATA[toUser]]></ToUserName>
  <FromUserName><![CDATA[fromUser]]></FromUserName>
  <CreateTime>12345678</CreateTime>
  <MsgType>news</MsgType>
  <ArticleCount>1</ArticleCount>
  <Articles>
    <item>
      <Title><![CDATA[title1]]></Title>
      <Description><![CDATA[description1]]></Description>
      <PicUrl><![CDATA[picurl]]></PicUrl>
      <Url><![CDATA[url]]></Url>
    </item>
  </Articles>
</xml>