1. First, open Tik Tok in your mobile phone and click "+".
2. Then, in the opened page, click the "red circle" to shoot.
3. Then in the page that opens, click the "Down Arrow" on the right after shooting.
4. Then in the drop-down menu that opens, click "Dubbing".
5. Finally, click or long press dubbing, and you can choose to keep or not keep the original video sound. Click "Save" when you are finished.