Click the Post Bar on the search box at the top of Baidu page → My I Post Bar at the top right → Personal Settings at the bottom left → Signature Settings at the top → Add a set of signature files → Fill in the picture address.

After setting, when posting in the post bar, check "Use signature file" below and select the set picture. After posting, you can see a picture below the post.

If the local computer icon has no picture address, you can upload the picture to Baidu Space Album and copy the picture address in the album.

Log in to your own Baidu space/→ "photo album "→" upload photos "and upload photos to the photo album according to the prompts; Then enter the photo album, click on the picture to view the big picture → right click on the picture → properties, and copy the picture address inside.

Note: New users of Baidu need to register for 3 months or more to set the signature file.