First upload the image to be used as a signature file from the computer to the space,

Secondly open Baidu Tieba and log in,

Then find your own on the right For account information, click to open "Enter my iTieba" below.

After opening iTieba, find "Personal Settings" in the "Home Page" on the right.

After opening "Personal Settings", click "Signature File Settings".

Open "Add a Set of Signature Files"

Enter the space, enter the album, right-click on the picture you uploaded, click Properties, and then change the "Address (URL)" Copy the following links.

Open "Signature File Settings", paste it out of the "Image Link" in "Create Signature File", and click "Submit".