Yunnan Province, Luquan, Wuding, Yongren, Lufeng, Yuanmou, Qujing, Xundian, and Huize counties; south Sichuan Province, Huili county.
Luquan Naso, Wuding Naisu. The Naisu dialect is also called Hong Yi (Red Yi). Degrees of similarity between dialects, and also with Naluo [ylo], needs further investigation.
Officially classified within Yi nationality. Hei Yi means Black Yi. Christian, traditional religion.