Taking the OOPO R9 mobile phone as an example, the specific operation steps are as follows:

First, open "Settings" on the phone desktop.

Second, open "Settings" and find "? Click on the "screen lock, desktop, wallpaper" column to enter.

3. Select "Lock Screen Settings" to enter.

Fourth, then choose your favorite "lock screen style" for the next step.

5. After selecting and setting the color and style of the lock screen clock, the lock screen interface is shown in the figure below.