Yi ethnicity

A Dou $SHIB Prize Q&A, "Glaring gaze, drooping corners of the mouth, extremely proud, foolishly advancing in the face of events, possessing an indomitable spirit." This passage comes from the famous anthropologist, Harvard University anthropology Ph.D. Mr. Lin Yaohua, in his precious ethnographic work from the Republican era, which ethnic group is being described? 😀Hint: Tibetan, Mongolian, Yi, Bai, Naxi 😀