The Mang ethnic minority, also called Mang U, Xa La Vang live in Sin Ho, Muong Te, Phong Tho districts of Lai Chau Province; and Muong Cha District mangof Dien Bien Province.
The chief of the village, together with the council of the oldest men, takes responsibility for the affairs of his village. The houses are built on stilts. Young Mang men and women are free to choose their own partners. According to customs, the two families are made to struggle for the bride on the wedding day as the bride is brought from the house of her family to worship the heavens.
The Mang language belongs to the Mon-Khmer Group. Chin tattooing is considered a rite for young men to mature into adulthood.
Men wear garments consisting of a short vest open at the front and trousers. Women wear a long skirt, a short vest open at the front, and a piece of white cloth decorated with various motifs.
The Mang practice slash-and-burn cultivation techniques with rudimentary home-made tools. The Mang cultivate rice in terraced fields similar to the Tha and practice basketry.