Tools/materials: iPhone 13, iOS 15, WeChat 8.0. 16.
1. Open the WeChat my page, click the setting options in the page, turn to the setting interface, and click the general options.
2. After switching to the regular page, click the chat background option in the middle of the page.
3. After jumping to the chat background page, click Select Background Image at the top of the page.
4. Select your favorite theme wallpaper, click Finish in the upper right corner of the page, and then apply the theme wallpaper to all chat scenes.