A 22-year-old boy is playing badminton on the court, wearing this short-sleeved shirt. There is no pattern on the front of the short-sleeved shirt. When taking off and spiking, the hem of the short-sleeved shirt is blown upwards by the airflow, revealing a bit of the waistline. The pattern of the racket slightly shifts as the body soars into the air. When catching the ball, he bent sideways and the side of his short sleeve was wrinkled and piled up. After scoring, he raised his hand and clenched his fist to cheer. When he raised his arm, the cuff of his short sleeve slipped, revealing the muscles of his forearm. The pattern swayed in front of his chest. He casually brushed the dust off his short sleeve, and the pattern vibrated twice. The proportion of the pattern remains unchanged during the process