How did you shoot the special effect of changing face for Tik Tok?

Take Xiaomi 8 mobile phone as an example. First, click Tik Tok on the mobile phone desktop (some areas are coded to protect personal privacy), as shown in the following figure:

Secondly, click the plus key at the bottom of the screen, as shown in the figure below:

Third, click on the props at the bottom left of the screen, as shown in the figure below:

Fourth, then order Peking Opera face-changing props, as shown below:

5. Then click the shoot button at the bottom of the screen, as shown in the figure below:

Six, after the shooting is completed, click Next, as shown in the figure below:

Seven, finally click publish, as shown in the figure below: