Little mermaid. The waist is a hinge connecting the upper body and the lower body. When exercising, people must rely on the waist to maintain the center and balance of the whole body, and also control the strength and amplitude of the movements of all joints of the whole body. Especially in China classical dance, the position of waist is irreplaceable, and waist is the embodiment of the connotation and realm of China classical dance. If body rhyme is the soul of classical dance, then waist is the foundation of body rhyme. However, waist exercises should not be rushed for success, but should start with basic waist strength and quality ability.