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Gold medalist Daiya Seto of Japan competes during the men's 200m medley final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 25, 2019. (Xinhua/Li Gang)

Gold medalist Daiya Seto of Japan competes during the men's 200m medley final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 25, 2019. (Xinhua/Li Gang)