Cao Bằng is a province of the Northeast region of Vietnam. The province has borders with Tuyên Quang, Thái Nguyên and Lạng Sơn provinces within Vietnam. It has an international border with Guangxi pro

The Nùng are a Central Tai-speaking ethnic group living primarily in northeastern Vietnam and southwestern Guangxi. The Nùng sometimes call themselves Thổ, which literally means autochthonous. Their e