Dance was originally used for sacrifices (in primitive society) to please the gods and pray for a good harvest and peace. The dancers were all wizards or priests. When they had enough food and clothing, they used dance to sacrifice to the gods. Later, it gradually evolved. It started as a celebration, and later it turned into 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 the free time is spent on To satisfy other needs, this is the so-called satiety, warmth, and sexual desire.