The Ru River is a very important section of the Silk Road transportation network during the Han and Tang Dynasties.It was opened early and is relatively close to Chang'an.Many historical dramas have been staged along the route,leaving many traces of cultural exchanges between China and the West.Numerous Buddhist grot-toes,stele towers,and gold and stone statues are inlaid on the cliffs or roads along the route,quietly guarding the ancient road,reflecting the grand occasion of the fusion of Chinese and foreign cultures in the past.