Yungang Grottoes are located in the southern foot of Wuzhou mountain, 17 kilometers away from the western suburb of Datong City, Shanxi Province, North China. The grottoes are cut according to the mountain and extend for 1 km from east to west. There are 45 major caves, 252 niches of different sizes, and more than 51000 carved statues. It is one of the largest ancient Grottoes in China. It is also known as China's four major Grottoes art treasures together with Mogao Grottoes in Dunhuang, Longmen Grottoes in Luoyang and Maijishan Grottoes in Tianshui.