1. Find and open the music application that comes with Xiaomi's mobile phone. In the application main interface, click the "My" option in the lower right corner.

2. in my interface, select my song list and click enter. in the song list interface, select a song list to add songs and click enter.

3. At the bottom of the song list, click the "Add Song" button. In the pop-up file selection box, find and select the song you want to add to the song list, and then click "Add".

4. Wait for the songs to be added, and then you can see the newly added songs in the song list.