Gangdong, with a long history, is a Tibetan, Mongolian, and Han lip-vibrating gas-singing musical instrument, derived from ancient horn musical instruments, and is one of the Tibetan Buddhist instruments.

Gangdong is mainly used for chanting music in Lama monasteries, Qiangmu performances and religious ceremonies. It is a religious musical instrument commonly used in large-scale Tibetan Buddhist monasteries. In Baoding, Xushui, Dingxian, Laishui and other places in Hebei Province, copper steel holes are also used, which are used in the performance of "Southern Music Club", and are locally called Lamahao or "Haizhuzi".

The tube body is mostly made of copper, but also made of silver or bone, with different shapes and specifications. The copper-made steel hole has a humming sound, a rough tone and a very loud volume. Two wind instruments are often used at the same time, first in turn, and then in an ensemble. The music has the meaning of calling the gods. It is mainly used for chanting music in Lama monasteries, Qiangmu performances and religious ceremonies. It is a common religious musical instrument in large Tibetan Buddhist monasteries. It is mainly used on occasions such as lamas chanting the "jue" (jio) scriptures, holding sky burial ceremonies, or wandering monks engaging in religious activities alone.