At first (primitive society), dance was used for offering sacrifices, pleasing gods and praying for harvest and peace. Dancers are wizards or priests, and they have no worries about food and clothing. Later, they used dance to worship the gods, which gradually evolved into a celebration and later became entertainment. This is the law of the development of human civilization, because with the evolution of human beings and the progress of productivity, less and less time and energy are spent on food and survival, and leisure time is used to meet other needs. so-called