Sanyanxiao is a Miao ethnic group living in Huadong, Zhongzhai, Potoushang, Lizhongdi in Agong Town, Zhijin County, and Pingzhai, Anhang, Dashuichong, etc. (hmongb rongf)”] In social life, especially young men and women play a unique self-made musical instrument in the occasion of falling in love. It is named because it has only three sound holes. ".

This three-eyed flute is shaped like a Han musical instrument Dongxiao (also known as a Su Di or a recorder) and a Western musical instrument black pipe, but the unique difference is that there are only three sound holes, and the thickness of the pipe is different. It is made by taking a section of bamboo tube that is not limited in length, thickness and thickness, as long as there are seven knots; take the root end of the bamboo tube as the upper end, cut down the 1.5 cm part of the back to form an oblique mouthpiece, and cut a pronunciation hole 3 cm from the front; Above the pronunciation hole, the left and right sides are cut into the air blowing fork, and a thin bamboo reed is embedded in the fork. The reed covers 1/4 of the pronunciation hole, and the two sides are sealed with rice straw or wheat straw. Then, cut two sound holes on the front according to a certain proportion, and cut a sound hole on the back between the two sound holes.