Xu Hongzhi (back) and Wu Dajing of China make changeover during men's 5000m relay final of short track speed skating at the 2018 PyeongChang Winter Olympic Games at Gangneung Ice Arena, Gangneung, South Korea, Feb. 22, 2018. Team China claimed silver medal in a time of 6:32.035. (Xinhua/Lan Hongguang)