The Gâm River (, , Bainan he) is a river which derived from the

Guangxi Guangxi,; officially the Guangxi Zhuang Autonomous Region, is an Autonomous regions of China, autonomous region of the China, People's Republic of China, located in South China and bordering Vietnam (Hà Giang Province, Hà Giang, Cao Bằn ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

. The river enters Vietnamese territory at

Cao Bằng Province Cao Bằng is a province of the Northeast region of Vietnam. The province has borders with Hà Giang, Tuyên Quang, Bắc Kạn, and Lạng Sơn provinces within Vietnam. It also has a common international border with Guangxi province in Chi ...

, . And then rivers in

Hà Giang Province Hà Giang (, ) was formerly a Provinces of Vietnam, province in the Northeast (Vietnam), Northeast region of Vietnam. It was located in the far north of the country, and contains Vietnam's northernmost point. It shared a 270 km long China-Vi ...

and

Tuyên Quang Province Tuyên Quang () is a province of Vietnam, located in the northeastern part of the country to the northwest of Hanoi, at the centre of Lô River valley, a tributary of the Red River. Its capital is Tuyên Quang. The province had a population of ...

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

.''Vietnam Administrative Atlas'', NXB Bản Đồ, 2004

References

Rivers of Guangxi Rivers of Cao Bằng province Rivers of Hà Giang province Rivers of Tuyên Quang province Rivers of Vietnam {{China-river-stub