The Yangtze River, or Chang Jiang,about 6,385 km long (3915 mi) and flows from its source in Qinghai Province, eastwards into the East China Sea at Shanghai. It acts as a dividing line between North and South China, although geographers generally consider the Qinling-Huai River line to be the official line of geographical division. As the largest river in the region, the Yangtze is historically, culturally, and economically important to China. One of the dams on the river, the Three Gorges Dam, is the largest hydro-electric power station in the world. The section of the river flowing through deep gorges in Yunnan province is part of the Three Parallel Rivers of Yunnan Protected. 

Waters of the Yangtze are often used for rice and wheat irrigation. It also has enormous and inexhaustible hydroelectric resources. In 1995 construction began on the Three Gorges Dam near Yichang and is scheduled for completion in 2009. The dam will measure about 600 feet and about 1.5 miles wide. The dam is expected to help control the flooding of the Yangtze River Valley. The Three Gorges (the Qutang Gorge, the Wuxia Gorge, and Xiling Gorge) will also be the largest electricity generating facility in the world. The hydroelectric generators will provide 1/9 of China's total power output.