WeChat.ServerMessage.XmlMessage.reply_image
You're seeing just the function
reply_image
, go back to WeChat.ServerMessage.XmlMessage module for more information.
Link to this function
reply_image(to_openid, from_wx_no, timestamp, media_id)
回复图片消息 - 官方文档
<xml>
<ToUserName><![CDATA[toUser]]></ToUserName>
<FromUserName><![CDATA[fromUser]]></FromUserName>
<CreateTime>12345678</CreateTime>
<MsgType>image</MsgType>
<Image>
<MediaId><![CDATA[media_id]]></MediaId>
</Image>
</xml>