1. Take the iPhoneXS as an example, open the mobile phone desktop, find the Tik Tok icon, and click Enter, as shown:

2. After entering the Tik Tok page, click the "+"at the bottom of the page to shoot, as shown in the figure:

3. In the shooting interface, click the "Prop" icon in the lower left corner, as shown:

4. Click "Props" and select the "Novelty" tab, as shown:

5. Find the style of the special effect of "changing face" in the "Novelty" tab, and click it, as shown in the figure:

6. You can change your face by shaking your head in front of the camera during the final shooting, as shown in the figure: