1. Open QQ Music on your mobile phone, enter the My interface, and click on the "three horizontal lines" in the upper right corner of the page.

2. Enter the more interface and click the "Personalized Dressing Center" option.

3. Enter the personalized dressing center and click "My" in the upper right corner.

4. Enter My Theme and click "Customize Background".

5. Enter the custom background, select the theme font color, and click "Done" in the upper right corner of the page.