"Air vocal singing" is a style that combines air and sound without following the rules of vocal production. The normal vocal law requires that when the breath vibrates the vocal cords, the two vocal cords should be closed to produce sound, which is relatively strong and loud, while "air vocal singing" means deliberately not closing the vocal cords completely and letting air flow through the vocal cords that are not fully vibrated. In this kind of sound, due to the obvious sound of airflow, the color of the sound is slightly dim, illusory and even hoarse. This kind of voice is more natural and friendly, especially infectious.