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Gold medalist Xu Jiayu (R) of China celebrates after the men's 100m backstroke final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 23, 2019. (Xinhua/Xia Yifang)
Gold medalist Xu Jiayu (R) of China celebrates after the men's 100m backstroke final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 23, 2019. (Xinhua/Xia Yifang)