The specific steps are as follows:

1. Open a video in Douyin and click on the music in the lower left corner.

2. Click "Collect" on the pop-up page.

3. Then click "Select Music" at the top of the Douyin page.

4. Click "My Favorites" on the pop-up page.

5. On the pop-up page, you can find the music you copied others, just click to use it.