Bone flute is a kind of flute and the earliest musical instrument. Also known as eagle flute or eagle bone flute, Tibetan, Tajik, Kirgiz edge air-sounding musical instruments, called Dangja in Tibetan. Made of eagle wing bones, it is popular in Tibetan pastoral areas such as Tibet, Qinghai, Yunnan, Sichuan and Gansu. Often used for solo. It is a self-entertainment wind instrument favored by Tibetan youths. It is mostly played for self-entertainment during grazing or field work in summer.

In the spring of 1994, farmers in Sanzuodian Village, Chutoulang Township, Songshan District, Chifeng City, Inner Mongolia found a bone flute while planting trees. The bone flute has a dark yellow tubular shape and is made from the limb bones of birds, which have been petrified. The bone flute is about 15 cm long and has an outer diameter of 1.5 cm to 0.7 cm. It has 5 sound holes at equal distances. The sound holes are about 0.3 cm in diameter and there are two opposite small holes about 0.2 cm at the bottom.

The age of the bone flute is based on archaeological data and the method of material analogy. The comrades of the Ministry of Education and Culture have identified and identified the Hongshan culture painted pottery fragments and polished stone tools discovered at the same time as the bone flute, and confirmed that the bone flute belongs to the Hongshan culture period. About 5500 years ago. The discovery of this musical instrument during the Hongshan Culture period adds a physical material to the study of the musical instrument culture of ancient northern Chinese nationalities, especially the music culture of the "ritual music system" during the Hongshan Culture period.