If the stars witness the vast universe growth, then the Mogao Grottoes are a great miracle that records the long history of Chinese history, and it is also a witness of human spiritual civilization. Located in Dunhuang, at the western end of the Hexi Corridor in China, Mogao Grottoes is the world's largest and most content-rich Buddhist art sanctuary. The Mogao Grottoes and the Yungang Grottoes in Datong, Shanxi, the Longmen Grottoes in Luoyang, Henan, and the Maijishan Grottoes in Tianshui, Gansu are also known as the Four Great Grottoes in China. In 1987, Mogao Grottoes was listed as a World Cultural Heritage. It is the largest and most abundant Buddhist art place in the world.