How to spit lips in vocal music?

The most important thing is to use breathing,

Without breath, of course, you can't play Dulu.

Start with breathing exercises. You can imitate the breathing practice of dogs and feel the use of breath initially. Then, it is best to cross your hands on your waist and relax your lips. Pay attention to the outward expansion of the waist muscles, exhale evenly and slowly lengthen the time.

The study of vocal music always needs long-term unremitting practice.

Come on!