Jian Jian is a single-reed gas-sounding instrument of the Zhuang ethnic group. It is popular in Fangcheng Autonomous County of Guangxi Zhuang Autonomous Region.

Jian Jian's tube body is made of bamboo, mostly made of small green bamboo grown locally. The tube is 20 cm long, with a bamboo joint at the upper end and an open lower end, with an outer diameter of 1 cm and an inner diameter of 0.7 cm.

The front tube wall under the head end section is thinned and flattened by 4 cm, and a rectangular bamboo reed is carved on it with a sharp knife. There are six square sound holes on the front of the tube body, and each side of the sound holes is 0.5 cm long. The distance between the first hole and the tail end and the first to sixth holes is 2.4 cm, and the sixth hole is 3 cm away from the reed.