Xu Kun did indeed study combat sports, because he was the physical education class representative for the sophomore class two at Number One Middle School, and he had a very good relationship with the physical education teacher, so they often sparred together.
However, the combat sports he practiced were not professional fighting techniques, but a form of free combat aerobics that combined boxing, Muay Thai, Taekwondo, Sanda, and Tai Chi. It was considered an aerobic exercise designed to train the body in line with musical rhythms.
Never underestimate these combat aerobics; although they're just aerobics, they also integrated some striking and kicking techniques. As expected, Xu Hu quickly ran out of the power to counterattack and was subdued on the ground by Xu Kun.
"How about that, boy, are you convinced?"