The steps are as follows:

1. First, log in to your QQ Music.

2. Then in your QQ Music, you will see the logo as shown in the upper right corner, click on it.

3. Then you will see settings in it, click Settings.

4. Then see Download and Cache, click Settings, and put the download into your MP3.

5. Download the music you want and wait for the download progress bar to turn to 100%.

6. Then you can see the music you just downloaded in your MP3.