The fan is turned on and off. The action of spreading the sector into a semicircle is called sector opening and closing, which is the basic action in fan dance. When the sector is unfolded into a semicircle, the two ends of the sector need to be unfolded outward, and the center of the sector should be folded to make it semicircle. In the process of dancing, dancers can use the strength of wrists and arms to control the movement of fans, showing various dance movements and skills.