River in southeastern Asia, principal river of northern Vietnam. It rises in the mountains of Yunnan Province in southern China, where it is called the Yuan Jiang. It then flows southeast across northern Vietnam, where it is called the Sông Hong. The river passes through Hanoi and empties into the Gulf of Tonkin. Its chief tributaries are the Black (Sông Dà) and Clear (Sông Lô) rivers. The delta of the Red River forms one of the most fertile and populous areas in Vietnam.
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modificado pela última vez por sortiz, 06.27.17