Flying and cave-making in Dunhuang murals appeared at the same time, starting from sixteen countries and going through ten dynasties, which lasted for more than a thousand years until the end of Yuan Dynasty. Almost all of the 492 caves in Dunhuang Mogao Grottoes are painted with flying sky. Due to the change of dynasties and frequent exchanges between Chinese and Western cultures, the attitude, artistic conception, style and taste of Tian Fei in Dunhuang have been constantly changing for thousands of years. For example, in the heyday of Dunhuang Feitian, that is, the whole Tang Dynasty, the image of Dunhuang Feitian reached the most perfect stage, and it was a complete China Feitian. Li Bai, a great poet in the Tang Dynasty, praised Fei Xian in Dunhuang: "Lotus is in the hands of amateurs, which is too empty." Dress dragging a wide belt, floating in the sky. "