The shape of the bamboo tube piano is simple and simple. The body of the piano is made of a bamboo tube, with a total length of about 50 cm and a diameter of 6 cm to 10 cm. The largest thickness is suitable for the player to hold.

Bamboo knots are left at one or both ends of the qin barrel, bamboo knots are left at one end in Tianlin and Duan, and bamboo knots are left at both ends in Nandan.

On two or three different sides of the middle section of the bamboo tube, a number of bamboo skin filaments are cut out to form the strings. Each bamboo silk string is 30 cm long, 0.1 cm to 0.2 cm wide, and the distance between the two strings is 2.5 cm. Both ends of the string are still connected to the bamboo tube, and are fastened with bamboo loops or thin lead wires so that the tube body is not easily peeled off.

Two strings on the same side form a set, and a piano usually has two to three sets of strings. The curved surface of the cylinder under each set of strings is cut into a flat surface, and bamboo horses are supported at both ends. The horse is 3.5 cm long and 0.8 cm high. A small wooden slat is embedded in the middle of the two strings as a "bridge", which connects the two strings so that they can resonate with each other when struck. The lower body of the "bridge" has a small circular sound hole with a diameter of 1 cm. There is also a slightly larger oval-shaped sound hole at 10 cm from the top of the end of the section of the piano body.