The ancient Silk road starts from Xi’an of China and goes West to ancient Rome, crossing the Pamir Plateau.Many cultural relics with a long history were left as well, Such as Terra-cotta warriors, Majishan grottos,Jia Yuguan Fort,Mogao grottos,Yangguan pass,Yumenguan pass,Jiaohe ruins, and others like Zhangye Danxia World Geological Park,Echoing Sanddune and Crescent lake, Xinjiang Tianshan Mountain, Pamir Plateau and so on. Every spring to autumn can be the best time to Silk road.