2. click the setting ringtone option in the pop-up window.
3. There may be an interface for us to upgrade Green Diamond Deluxe Edition, so we don't need to take care of it.
4. Then we click Download in the playback interface.
5. click on the local song after downloading.
6. Find the song, and then click more options on the right.
7. in the pop-up window, click to set the ringtone function.
8. after editing the music, select "set incoming call".
9. After that, a reminder of "Ring successfully set" will pop up.
that's how to set the ringtone function in qq music.