Quây Sơn River

The Quây Sơn River (Sông Quây Sơn, Sông Quế Sơn; chữ Nôm: 滝𡇸山, 滝桂山) or as the Guichun River as it is known in China, (Chinese: 归春河, Pinyin: ) is a river that passes through Cao Bằng Province, Vietnam and Guangxi province, China. The river originates in China in Jingxi County in the Chongshan Mountain Range (Chinese:崇山峻岭, Pinyin: Chóngshān jùnlǐng).

For part of its length it runs along the Chinese–Vietnamese border, including the scenic Bản Giốc–Detian Falls.