The corbel (pinyin: niú tuǐ qín) is a bow-drawn stringed musical instrument of the Dong people. Named for the slender body that resembles a cow's thigh. It is popular in Rongjiang, Congjiang, Liping, Qiandongnan Miao and Dong Autonomous Prefecture in Guizhou Province, Sanjiang, Rongshui in Guangxi Zhuang Autonomous Region, and Tongtong Dong Autonomous County in Hunan Province.

A traditional corbel, the body is made of a single piece of wood. Folks are mostly self-made, not only the materials used are different, but also the specifications and sizes of the pianos. There is no uniform standard. Generally, the total length is 50 cm to 85 cm. Locally produced fir, paulownia, pine, chun, poplar It is made of wood or miscellaneous wood, preferably fir with straight grain and no knots.

Since the 1950s, Dong folk artists and musicians have made certain changes on the basis of inheriting the traditional characteristics of the corbel, which expanded the volume and range of the original corbel, making the sound crisp and sonorous, and the timbre of the corbel increased. Bright and beautiful. Some also have a curved metal frame at the tail of the corbel, which can be held under the player's armpit when playing, so that the body can be fixed, which not only reduces the burden on the left hand, but also enriches and develops playing skills.