Chao River

…its two main tributaries, the Chao and Bai ("White") rivers, about 2 miles (3 km) south of the town of Miyun and 10 miles (16 km) south of the Miyun Reservoir (in Beijing municipality). The Chao is fed by source streams in the mountains of northern Hebei and flows southeast…

The principal tributaries are the Chao River, rising in the mountains north and northeast of Beijing; the Yongding River, flowing southeastward from the Guanting Reservoir through Beijing to Tianjin; the Daqing River, flowing eastward from the Taihang Mountains to join the Hai at Tianjin; and the Ziya River, flowing northeastward…