叶尔羌河
Kargilik/Yecheng is the name of both the oasis and the town. It is situated on the southern rim of the Taklamakan desert, about halfway between Pishan and Yarkand on the southern route around the Tarim Basin. It is about 50 km north of Kokyar. The rich loess terraces of the oasis are watered by the Tiznaf river and several smaller streams. They are joined to the north by a belt of cultivated land stretching about 40 km from the town of Yecheng to the Yarkand River.