Answered by Adeline | Oct. 26, 2012 20:29
It is mainly in the derection of East-West. It begins at Chang'an (now Xian) in the east, then by way of the Hexi Corridor, and it reaches Dunhuang, where it divides into three, the Southern Route, Central Route and Northern Route. The three routes spread all over the Xinjiang Uygur Autonomous Region, and then they extend as far as Pakistan and Rome.