How to delete the unwanted system ringtone of Meizu mx5?

Unable to delete the system ringtone. If you don't like it, you can customize it yourself.

Setting method of ringtone:

Open phone settings → sound and vibration → ringtone, and then you can select music or system ringtones in the "Flyem Music" and "ringtone" folders.

Custom ringtone setting method:

Just save the ringtone to a document-> Storage disk->; Ringtone folder, and then go to Settings-> Set the sound.