10,000 (Wurm and Hattori 1981).
Northwest; Son La and Dien Bien provinces, near ra River, north of Pa Ma.
6a (Vigorous). Language of recognized ethnic group: Xihn Mun.
None known. Related to Bit [bgk] in Laos and China.
Part of the Xinh Mun official ethnic community (23,278, 2009 census).