Lanzhou is the capital city of Gansu Province in northwest China. The Yellow River, the Chinese Mother River, runs through the city, ensuring rich crops of many juicy and fragrant fruits. The city is the transportation and telecommunication center of the region. Covering an area of 1631.6 square kilometers (629.96 square miles), it was once a key point on the ancient Silk Road. Today, it is a hub of the Silk Road Tourism Ring, with Maiji Caves to the east, Bingling Temple Grottoes to the west, Labrang Monastery to the south and Dunhuang Mogao Caves to the north. With mountains to the south and north of the city and the Yellow River flowing from the east to the west, Lanzhou is a beautiful modern city with both the grand beauty of northern cities and the prettiness of southern cities. The city downtown comprises five districts: Chengguan, Qilihe, Xigu, Honggu and Anning. Among them, Chengguan District, situated in the eastern part of the city, is the center of politics, economy, culture and transportation. Anning District, in the northwestern part, is the economic development zone as well as the area where most colleges are located.