Junda is a single-reed gas-sounding musical instrument of the Li nationality, which is full of strong local characteristics. The Han nationality calls it the double-pipe or Li nationality panpipes.

It is made of two Li nationality folk musical instruments, the Bi, which are tied side by side. The length and thickness of the tube body are exactly the same. The tube body is made of green bamboo, the length of the tube is 25 cm to 30 cm.

The first section of the tube is thinned, and bamboo reeds are carved on the tube wall. The reeds are 2 cm long and 0.3 cm wide. The reed roots are connected to the bamboo joints. Each sound hole, mostly four holes. The hole spacing and reed position of the two tubes are the same, and the upper and lower ends are respectively tied and fixed with thin wires.

The Chinese Musical Instrument Museum of the Institute of Music of the China Academy of Arts in Beijing has a collection of the Li nationality Yuda. The tube body is made of bamboo, with a total length of 27 cm.