Son Lais a province in the Northwest region of Vietnam. It borders Laos to the south. The province covers an areaof 14,123.49 square kilometres and as of 2019 it had apopulation of 1,248,415. The population includes Black and White Tai ethnic group.

Thac Chiung Khoa, also known as Chieng KhoaWaterfall, is a beautiful waterfall located in Moc Chau district of Son La province, Vietnam. The waterfall is situated in aforested areaand is surrounded by lush greenery and towering trees.

Thac Dai Yem, also known as the Dai Yem Waterfall, is a picturesque waterfall located in Moc Chau district of Son La province, Vietnam. The waterfall is situated in alush forested areaand is surrounded by stunning scenery, including hills, mountains, and rice fields.