The steps are as follows:

Tools/raw materials: Software: QQ Music version 9.2, mobile phone: vivoX6A, system: PD1415A_A_1.20.1

Method:

1. In the mobile application, open QQ Music.

2. Enter the page, click My, and then click Local.

3. On the local page, select a piece of music to be cut and click Play.

4. On the music playback page, click the three dots in the upper right corner.

5. The options page appears, click Set Ringtone.

6. On the ringtone setting page, select the part you want to crop, and then click Set as ringtone.

7. Select a ringtone method, for example: set as incoming call ringtone.

8. The saving page appears and you can save the cropped music by setting it.

9. Open the file management on your mobile phone, enter the page, and click qqmusic.

10. On the qqmusic page, click ringtones.

11. On the ringtones page, you can see the music cut by QQ Music.