2,030 (2009 census).
Lai Chau Province, Muong Te district, east of Sila, south of Mang. Ban Nam Luong, 4 villages; Kan Ho commune, Bo Lech; Nam Khao commune; Muong Toong commune, Ban Bo village; Dien Bien Province, Muong Nhé district, Nam Ke and Pa Thom communes, near the Lao border.
No final consonants
Few domains. All ages. Mildly positive attitudes.
Cong is an official ethnic community.