The Gâm River (Vietnamese: Sông Gâm, Chinese: 白南河, Bainan he) is a river which derived from the Guangxi, China.
The river enters the Vietnam territory at Cao Bằng Province, 23°0′42″N 105°47′12″E.
And then rivers in Hà Giang Province and Tuyên Quang Province, Vietnam.[1]
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