Yao nationality bamboo tube (pinyin: Yáozú zhútǒng), also known as bamboo tube piano. It is the Yao nationality's falling body sounding instrument. Popular in Shanglin County and other places in the central part of Guangxi Zhuang Autonomous Region.
It is made of a bamboo tube with a length of 120 cm to 140 cm and a diameter of 9 cm to 10 cm. It is better to choose moso bamboo with a straight body and a thin wall, and decorate the exterior of the body with various patterns.
When playing, the player stands on the side of the tube, holds the upper end of the bamboo tube with both hands, and hits the ground with the bottom of the bamboo tube, making a rhythmic "dongdong" sound. Its pronunciation and volume are directly related to the length, diameter and wall thickness of the bamboo tube. If the bamboo tube is shorter, the diameter of the tube is smaller, and the wall of the tube is thicker, the pronunciation will be higher, and vice versa. The old bamboo with a straight body and a thin wall has the best pronunciation, bright timbre, strong resonance and good transmission. For folk song and dance accompaniment. In national festivals or festive occasions, several or a dozen bamboo tubes are often played at the same time, the sound is harmonious and the atmosphere is warm.