Winding about 3,964 miles, Yangtze River is the largest in China and the third largest in the world after the Nile in Africa and the Amazon in South America. Originating from the Tanggula Range in Qinghai Province in western China, it traverses eleven provinces and cities from west to east, including Qinghai, Tibet, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and Shanghai. Finally it pours into the East China Sea at Shanghai. As the largest water system in China, Yangtze River is historically, economically and culturally important to the country. It has numerous tributaries including Min River, Han River, Jialing River, Gan River, and Huangpu River. The Three Gorges Dam on the river is the largest dam project and hydropower station in the world. Generally, people consider the river a dividing line between North China and South China. Areas to the north and the south of the river have many differences in climate, scenery, economics, culture and folk customs.