为什么上传草稿箱接口，封面图片大小和像素都符合要求，为什么就是传不上去呢？在微信平台上传也提示图片高度和宽度乘积不能超过600万，但是这个图片的像素乘积并没有超过600万。如下为图片的属性 [图片]

微信号：jinpaixiaoshou40 原始ID：gh_f7897548c167 调用接口：https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Batch_Sends_and_Originality_Checks.html#0 预览连接： https://mp.weixin.qq.com/s?__biz=MzkxNTQxNjgxOA==&tempkey=MTE5Ml9WcTZHWTRrTGt3WDJMV1dZTmt3cmVEOEZMYm1ETWQyRnhGQ2xBcGs3MFRZb1l0Tk54eHFZTmhRRDlxbUtyTno2ek1mMXRGYlNnUkhNbzZUa3pLckRiQUNVZWZ4czRJQ2czSkV5ZnJIWkMyblhlZjYwd0g1emdmX3pZaEtRb1pER3R2bG95T2l5cFRHTk85VHEzYWZVS1p5UDlHcVhmSm41T1BWUlZnfn4%3D&chksm=415e32117629bb07c11de065f9a9b8465fd27b5832e78687b3dd6c3da65ade65d0fb51f97ac3#rd

同样是这样的图片URL：http://mmbiz.qpic.cn/mmbiz_jpg/7ibZyq5cCCp8FV3YDAjTZQraoC5HQm56DCicDBdM0e01EvnSbqibGwFXmzMsPiaHfribpEWfP6xMSAP1xsXQiaarQ35g/0 在浏览器地址栏中输入显示正常图片，放到网页<img>中显示“此图片来自微信。。。。。”的图片。

通过API上传文章到草稿箱，但是登陆网页版微信公众号平台，草稿箱内是空的，是怎么回事？ 公众号原始ID：gh_f7897548c167 "Y20SK1T471MZUCS3","把芯片放大1000倍，你就知道做芯片的人有多厉害","s8-0gyo4SGNGw0HuA_BUi-Vh3Wb1uSoUECIByiLzxuW5KsPgCFUrqTfprkpOChDi" "EUC8Q2OF0DJHX75F","不忘初心","CMS7jZpgZpfenwSPSzqLOyPnvwpGqQm6PChS-WgNcKG2pkJGyY-5IYUcE5LwVEbE" "BWLWLO2BJ3FOAT1N","测试","-xwZWeyUfsIGUvOTcXNhlNZBocxDSIfsQARWbF-i-HZ0Es5RmG7-rcPiWDW0DSVR" "GC1X04XRIJD7C24C","特斯拉的下一站：“价格屠夫”","-xwZWeyUfsIGUvOTcXNhlFTZ3J-LAiKf_eF2HDsEP8-k_JtUkAbe5cGyy6F9Yf20" "AKPEBU03ESLV28BL","特斯拉","kI4BSzl9JVLkL2s1YoMAtxXe4XB2nZKpSJquD5mjuZAV_sT8tcYPXsFN7A31zh-S" "C2ZFVHF5VE205EJ5","忆当年","-xwZWeyUfsIGUvOTcXNhlPrK74LTWxP_gYIsaJu6oB7tJlO4D78CrBS27rJrmv0s"

通过API上传到草稿箱文章，接口返回了mediaId，如下，但是PC登陆微信公众号管理平台后，草稿箱内是空的。 公众号原始ID：gh_f7897548c167 "Y20SK1T471MZUCS3","把芯片放大1000倍，你就知道做芯片的人有多厉害","s8-0gyo4SGNGw0HuA_BUi-Vh3Wb1uSoUECIByiLzxuW5KsPgCFUrqTfprkpOChDi" "EUC8Q2OF0DJHX75F","不忘初心","CMS7jZpgZpfenwSPSzqLOyPnvwpGqQm6PChS-WgNcKG2pkJGyY-5IYUcE5LwVEbE" "BWLWLO2BJ3FOAT1N","测试","-xwZWeyUfsIGUvOTcXNhlNZBocxDSIfsQARWbF-i-HZ0Es5RmG7-rcPiWDW0DSVR" "GC1X04XRIJD7C24C","特斯拉的下一站：“价格屠夫”","-xwZWeyUfsIGUvOTcXNhlFTZ3J-LAiKf_eF2HDsEP8-k_JtUkAbe5cGyy6F9Yf20" "AKPEBU03ESLV28BL","特斯拉","kI4BSzl9JVLkL2s1YoMAtxXe4XB2nZKpSJquD5mjuZAV_sT8tcYPXsFN7A31zh-S" "C2ZFVHF5VE205EJ5","忆当年","-xwZWeyUfsIGUvOTcXNhlPrK74LTWxP_gYIsaJu6oB7tJlO4D78CrBS27rJrmv0s"

订阅号群发接口，消息有字数和图片大小限制吗？封面有大小限制吗，消息中插入图片是否可以，有什么限制？