The Bahnar is one of 54 ethnic groups in Vietnam. Bahnar compatriots live mainly in the Central Highlands, they have unique customs and activities, forming a rich culture. Nearly 100 years ago, two scholars Nguyen Kinh Chi - Nguyen Dong Chi, by fieldwork, recorded the characteristics of the life, culture and language of the Bahnar people. In this book, readers can be aware of the human geographical features and residential development history of rural Kon Tum, villages, and two urban areas of Kon Tum and An Khe, administrative organization, cultivation, trade, ethnography, Baani humanity, cosmology and polytheism, village customs and folklore, calendar and weather according to the concept of ethnic people, proverbs, basic words, fairy tales, festive musical instruments of the Bahnar e in the 20-30s of the last century. This can be considered as the first in-depth research on a minority in Vietnam.