1. Merge fingers on the mobile phone desktop, and the following interface will appear. Click on the wallpaper in the lower left corner.

2. You can use the online wallpaper, the wallpaper in your own gallery and the wallpaper built in the system, select the one you like, and then click the tick icon in the upper right corner to apply.

3. When applying, you will be prompted to set the lock screen wallpaper or desktop wallpaper, and choose to set the lock screen wallpaper.