the north of the Wulan Mulun River, a tributary of the Yellow River, while Altan Xire is to the south of the same river. The area of Ordos can roughly be divided into a hilly area in the east, high plateaus in the west and center, sandy deserts in the north and south, and plains at the southern bank of the Yellow River. The highest elevation, at , is located in the west, and the lowest point, at , is in the east. There are two large deserts in the territory of Ordos: Kubuqi Desert in the north and the Mu Us (Maowusu) Desert in the south. The Kubuqi Desert occupies 19.2% of Ordos, or , while the Maowusu Desert takes up 28.8% of the area, or . Ordos features a cold semi-arid climate (Köppen BSk), marked by long, cold and very dry winters; very warm, somewhat humid summers; and strong winds, especially in spring. The annual precipitation is in the eastern part of the city and in the western part. Most of the rain falls between July and September, with very little snow in winter; average annual evaporation reaches . In the city proper, the monthly 24-hour average temperature ranges from in January to in July, while the annual mean is . Sunshine duration averages 2,700 to 3,200 hours annually. Economy Ordos is one of the most prosperous regions of China when measured by GDP figures. With a nominal per-capita GDP of US$34,352 and ppp per capita GDP of $65,192 in 2016, it ranks first among prefecture-level divisions in the entire Chinese mainland, and second in the PRC (including Hong Kong & Macau), behind Macau (Nominal GDP per capita: US$67,079; GDP (PPP) per capita: $96,148). It is extremely rich in natural resources, having one sixth of the national coal reserves. The pillars of its economy are textiles (wool), coal mining, petrochemicals, electricity generation, production of building materials, and bitcoin mining. An industrial park in Dalad Banner is home to one of the world's largest bitcoin 'mines' - really a massive server farm - owned by Beijing-based Bitmain. China is building a third ICBM site near Hanggin Banner, Ordos City, in Inner Mongolia. It will hold more than 100 new DF-41 intercontinental ballistic missiles. It joins two other ICBM fields at Yumen and Hami. Administrative subdivisions Ordos Shi is divided into two districts and seven banners: Kangbashi New Area A