The small flute is a vertical wind instrument of the Wa ethnic group. The Wa language is called "Wagelo", "Weili" or "Live". Widely popular in Yunnan Ximeng, Cangyuan, Menglian, Lancang and other Wa inhabited areas.

The Wa Xiaodudi entered the period of "film-changing voice". The so-called "film-changing sound" means that a film hole is opened between the blowing hole and the finger hole of the bamboo flute, and a layer of film on the inner wall of the reed pipe is pasted, so that the sound of the bamboo flute is crisp and bright, and the volume of the bamboo flute is increased. also enhanced. Bamboo flute players correctly select the membrane and adjust the tightness of the membrane, which is the key to mastering the timbre characteristics of the bamboo flute.