Bulu, also spelled Boulou, inhabit the hilly, forested areas of Cameroon as well as mainland Guinea and northern Gabon. They are a subgroup of the Fang people.
The Bulu grow crops of cassava and corn. Due to the area in which the Bulu inhabit, a substantial portion of their income comes from cacao production. From this profit, the Bulu have long participated in the economic, political, and intellectual growth of Cameroon.
In late colonial years, the Bulu founded a formal tribal union with all clans represented and efforts coordinated for social welfare. American Protestant missionaries have had a great influence, and Bulu sculpture and other arts have been redirected from religious purposes to a flourishing tourist market.

Source: https://www.britannica.com/topic/Bulu