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Yang Junxuan of China gets ready before the women's 4x200m freestyle relay final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 25, 2019. (Xinhua/Li Gang)

Yang Junxuan of China gets ready before the women's 4x200m freestyle relay final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 25, 2019. (Xinhua/Li Gang)