a: the concept of primitive music and dance refers to the trinity of song, dance and music. It is the early state of music in China. Because the productivity level of primitive society is relatively low, the art is relatively crude and simple, and there is a considerable degree of interdependence among song, dance and music. Therefore, the artistic performance form of singing, dancing and playing music originated from the same mother body has become "music and dance". The difference between music and dance is that it has separated from the early form of the trinity of song, dance and music in the stage of music and dance, but is independent of singing, dancing and instrumental music.