How to edit a song is as follows:

Tools: Huawei P4, HarmonyOS2.., Music 12.11.21.316.

1. enter the music software that comes with the mobile phone, click on mine, enter my personal homepage, and find and enter the local (downloaded music).

2. Select the music you want to intercept from the local music, and click the: symbol at the back.

3. In the pop-up menu, slide down to find and click Set as ringtone.

4. In the new interface, select the clip you want to intercept, and then click Save.