The Mogao Grottoes are located in Dunhuang at the western end of the Hexi Corridor. Its excavation lasted for about 1,000 years from the Sixteen Kingdoms period to the Yuan Dynasty, which is unique in Chinese grottoes. It is not only a splendid art treasure house of ancient Chinese civilization, but also an important witness of the dialogue and exchanges between different civilizations that took place on the ancient Silk Road. There are 735 caves in Mogao Grottoes, more than 45,000 square met...