As one of the four greatest grottoes in China, Maijishan Grottoes is well known home and abroad for its exquisite clay sculptures making it worthy of name "the oriental sculpture museum".
Yulin Grottos is widely recognized as a branch of Dunhuang Mogao Caves.Currently, forty-two caves from Yuan Dynasty to Tang Dynasty are preserved. These sculptures are of different facial expressions.
Yumen Pass, an important gateway on western frontier during Han Dynasty. Yumen Pass played an important role both in trade and military defense in ancient times.