There are several reasons for this. First, from a social perspective, Rap music originally originated in poor black neighborhoods in the United States. Many black people cannot afford to go to school, have no jobs, and are subject to racial discrimination. Coupled with the large number of gangs, they combined many music types with black roots to produce Hip-Hop music (Blues, Soul, etc. in the history of Western pop music are all fused from the national music of black Africans). In this way they express their joy, sorrow, and cynicism. Second, from the perspective of racial characteristics, most black people in the United States have innate conditions for their sense of rhythm and grasp of the rhythm of language. The tongues of these black people are softer and more flexible than those of other races, and they can produce denser words faster. A series of words. In addition, because Rap first originated from African Americans, there are many black Rap singers.