Li Yan (2nd R), head coach of China's short track speed skating team, celebrates after China's Wu Dajing winning men's 500m final of short track speed skating at the 2018 PyeongChang Winter Olympic Games at Gangneung Ice Arena, Gangneung, South Korea, Feb. 22, 2018. Wu Dajing claimed gold medal in a time of 0:39.584 and set new world record. (Xinhua/Wang Song)