Mouth flute (pinyin: kǒu xiāo), also known as Lilie, Lie, is a musical instrument played by the Li nationality. Popular in the Li nationality area of Hainan Province.

The shape of the mouth flute is similar to the suona pole. The tube body is made of several short bamboo tubes with different thicknesses, and it is trumpet-shaped. Open a circular sound hole in each section.

Mouth flute is mostly used for singing accompaniment, male blows and female sings. After the reform, the mouth flute can produce thirteen sounds b-g2. And made into high, medium and low-pitched mouth. The music includes "Meeting in Shanlan Garden", "Memories", "Wedding Dance" and so on.