How to make Tik Tok's music become its own original sound?

Tik Tok composes his own music into a soundtrack in the following ways:

Tools: OPPOReno7, ColorOS 12. 1, Tik Tok 23.4.0.

1. On the home page of Tik Tok, click the plus sign.

2. On the shooting page, click Album.

3. On the selection page, find the previously made video, and then click the video.

4. On the music selection page, do not select any music, and then click Next.

5. Finish editing, and then click Publish to finish creating.