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Chen Jie of China competes during the women's 50m backstroke preliminary at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 24, 2019. (Xinhua/Xia Yifang)

Chen Jie of China competes during the women's 50m backstroke preliminary at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 24, 2019. (Xinhua/Xia Yifang)