叶尔羌河
The ancient Silk Route into South Asia followed the Yarkand River valley. From Aksu, it went via Maral Bashi (Bachu) on the bank of the Yarkand River, to the city of Yarkand (Shache). From Yarkand, the route crossed the Bolor-Tagh mountains through the river valleys of Yarkand and Tashkurgan to reach the town of Tashkurgan. From there, it crossed the Karakoram mountains through one of the western passes (Kilik, Mintaka or Khunjerab) to reach Gilgit in northern Kashmir. Then it went on to Gandhara (the vicinity of present day Peshawar). The Indian merchants from Gandhara introduced the Kharosthi script into the Tarim Basin, and the Buddhist monks followed in their wake, spreading Buddhism. The Chinese Buddhist traveller Fa Xian is believed to have followed this route.