按照文档要求，我先通过

"https://api.weixin.qq.com/cgi-bin/material/add_material?access_token=&type=thumb"

上传了一个60k以内的jpg图，接口返回成功

Array

(
    [0] => 1
    [1] => CuGkxnZQ86YP7rNwc_zuVtBHMEDkwmPKTd42aEKk07I
    [2] => Array
        (
            [media_id] => CuGkxnZQ86YP7rNwc_zuVtBHMEDkwmPKTd42aEKk07I
            [url] => http://mmbiz.qpic.cn/mmbiz_jpg/hfNvhIneuG6LKzCQvUtgibafXiaZjsibMttiaZPlhoZ9wsqWqcYOOosckAib4BVic56pbThMapzHFx6K4PtWSuKFM5hw/0?wx_fmt=jpeg
            [item] => Array
                (
                )
        )
)
r然后我用这个返回的media_id作为thumb_media_id，调用
https://api.weixin.qq.com/cgi-bin/material/add_news
返回
{"errcode":40007,"errmsg":"invalid media_id hint: [4XW0_a09812217] rid: 6040328d-3e4e1907-278f4328"}

请问我错在哪里了？