The Tarim Basin is an endorheic basin in northwest China occupying an area of about 906,500 km2 (350,000 sq mi). Located in China's Xinjiang region, it is sometimes used synonymously to refer the southern half of the province, or Nanjiang (Chinese: 南疆; pinyin: Nánjiāng; literally: ""Southern Xinjiang""). Its northern boundary is the Tian Shan mountain range and its southern boundary is the Kunlun Mountains on the edge of the Qinghai-Tibet Plateau. The Taklamakan Desert dominates much of the basin. The historical Uyghur name for the Tarim Basin is Altishahr (六域), which means ""six cities"" in Uyghur.