Ban Gioc ??Detian Falls (Chinese: 敺瑕予?? & ?輻??? - Vietnamese: Th獺c B廕τ Gi廙 & Th獺c ?廙妾 Thi礙n) are 2 waterfalls on the Qu璽y S??n River or Guichun River straddling the Sino-Vietnamese border, located in the Karst hills of Daxin County in the Chongzuo prefecture-level city of Guangxi Province, on the Chinese side, and in the district of Trung Khanh District, Cao B廕彫g province on the Vietnamese side, 272 km north of Hanoi.

Guangxi, formerly romanized Kwangsi, is a province of southern China along its border with Vietnam. In 1958, it became the Guangxi Zhuang Autonomous Region of the People's Republic of China, a region with special privileges created specifically for the Zhuang people.