Xiaomi 10, MIUI 12.2.9.0, wechat 8.0. 1

1. On the WeChat discovery page, open the circle of friends option.

2. On the circle of friends page, click on the background picture.

3. Open the menu and select the option to change the album cover.

4. On the page of changing the album cover, you can choose the cover picture from different channels. Here we open the photographer's work options.

5. Find a nice picture, and click the Set as album cover option.

6. Return to the circle of friends page, and the background picture is set.