Signature line
You can upload it to your own Baidu photo album and copy it.
Picture link
The picture should not be too big, otherwise it may be compressed and deformed, and the size should not exceed 3M.
After uploading the picture to Baidu Album, right-click the picture to copy the link, and then look at the picture link at http:// letters. Is the English behind it picphotos or hiphotos? Picphotos can only be used if it is changed to hiphotos.