The Black River, (Vietnamese: Sông Đà, from the Tai language Da meaning "dark-brown") also known upstream as the Lixian River (Chinese: 李仙江) in China,[1] is a river located in China and northwesternVietnam.
Course
Its source is in Yunnan province of China. From China, the river's course passes through the Vietnamese provinces of Lai Châu (where it forms part of the border with Điện Biên province), Sơn La and Hòa Bình.
^World and Its Peoples: Eastern and Southern Asia: Volume 6 - Page 724 Marshall Cavendish Corporation - 2007 "RED RIVER The Red River (Song Hong in Vietnamese) rises in southwestern China and flows 750 miles ( 1,200 km) to ... Two major tributaries join the Red River: the Clear River (Song Lo) on the left bank and the Black River (Song Da) on ..."