The ox horns are the lip-vibrating instruments of the Han, Yao, Yi, Miao, Jingpo, Naxi, Nu, Dai, Buyi, Tujia, Gelao, Li and other ethnic groups. Popular in Gui, Guizhou, Yunnan, Sichuan, Hunan, Guangdong, Hainan and other provinces.
The horns are mostly made of naturally grown yellow horns or buffalo horns, which are often sourced locally, with different sizes, generally 40 cm to 70 cm in length. The cavities are connected, and the upper end of the round hole is reamed and obtuse-angled, similar to the mouthpiece. Some also install a bamboo or wooden mouthpiece at the upper end of the corner.