Conch, Tibetan, Mongolian, Naxi, Dai, Manchu, Han and other nationalities play wind instruments. Also known as Li, Fanbei, conch number, law snail and so on. Popular in Tibet, Inner Mongolia, Qinghai, Yunnan, Sichuan, Gansu and other provinces and regions.

Modern conch shells are made from conch shells that grow naturally in seawater, and the shells are spiral. Sizes vary, generally 25 cm to 33 cm in length. It is better to choose a conch with a clean color or with flower stripes, grind the tip of the conch to make a mouthpiece, and make the mouthpiece into a conical or straight cylinder shape, with an outer diameter of 2 cm to 3 cm, and a small central blow hole with a hole diameter of only 1 cm. cm, and some drill holes at both ends of the snail and wear thin leather ropes, which can be hung obliquely on the chest or under the armpits when not playing.

Conch decoration is more exquisite, usually inlaid with copper or silver pieces, which is very solemn and beautiful. Not only made of metal mouthpieces, but also inlaid with copper or silver sheets from the middle of the screw body to the screw mouth to make wing-shaped decorations, and the tail of the wings is also decorated with rings, which are decorated with silk ears or colorful silk.

A silver-winged conch in the Potala Palace in Lhasa, Tibet, has a total length of 57.7 cm, a wing length of 38.2 cm, a wing width of 23 cm, a mouthpiece of 11 cm in length, a diameter of 4.2 cm and an aperture of 1.8 cm. Sakya County, Tibet Sakya Monastery has a well-preserved conch of the Yuan Dynasty, which is said to have been given by the emperor of the Yuan Dynasty. The Chinese Musical Instrument Museum, Institute of Music, China Academy of Art, Beijing collects many conch snails. Most of the snails are white, with brown or yellow stripes or stripes. The total length is about 30 cm. 16 cm, short diameter 4 cm to 11 cm. Among them is a very precious shell of Qing Dynasty, with a total length of 35 cm. It was made during the Qianlong period (1736-1795). It was made of a naturally growing white conch, inlaid with a copper mouthpiece, and the body of the snail was inlaid with wing-shaped copper pieces. For decoration, one side is engraved with exquisite patterns, and the other side is engraved with the words "Qianlong Imperial System". These conch shells have been included in the large-scale picture book "Chinese Musical Instruments Guide".