Flying in Dunhuang is the business card of Dunhuang Mogao Grottoes and the symbol of Dunhuang art. As long as you see the beautiful flying, people will think of the art of Dunhuang Mogao Grottoes. Almost all of the 492 caves in Dunhuang Mogao Grottoes are painted with flying sky.

In the Tang Dynasty, "Guang Jin Ming Jing Shu" said: "It is also a heaven to call God in foreign countries." In Buddhism, the gods fly in the air, which is called flying. Tian Fei often appears in the murals of Buddhist grottoes. In Taoism, mythical figures who have ascended to heaven are called "immortals", such as "leading immortals", "celestial immortals" and "barefoot immortals", and immortals who can fly in the air are called flying immortals. There are all kinds of immortals in the tomb buried with Yu people. There were immortal scenes in the tombs of the Warring States and even earlier, which became more popular with the spread of immortal thought and early Taoism after the Eastern Han Dynasty.

After Buddhism was introduced into China, it exchanged and merged with Taoism in China. During the Wei, Jin, Southern and Northern Dynasties, when Buddhism began to spread, the flying immortals in murals were also called flying immortals, which was the difference between flying immortals and flying immortals. With the in-depth development of Buddhism in China, the flying of Buddhism and the flying fairy of Taoism are integrated in artistic image. It now refers to the flying gods in Dunhuang Grottoes, and later became the proper term of Dunhuang mural art unique to China.