ラーオ族
At the late nineteenth century when road infrastructure was underdeveloped, Srepok river was a crucial water transport route between Vietnam's Central Highlands and Cambodia and Laos. Lao people and Khmer people went to the upstream by boats to exercise trading with people there. Ban Don (Buôn Đôn, Đắk Lắk, Vietnam) once was a busy river port town. Lao people came and inhabited in Stung Treng as well as Ban Don and considerably contributed to Ban Don's special culture features.