By setting, enter the chat, select the chat background, and click the background map, you can set it. Let me share the operation steps:

The software version is 8.0.28. Mobile phone model: vivo Y31s.

The operation steps are as follows:

1. Open the mobile phone WeChat software, click me first, and then click Settings.

2. After entering, click Chat.

3. Then click on the chat background.

4. Then click to select the background image.

5. Click on the background picture you like and set it successfully.

After the setting is completed, the chat interface will display the background picture you set.