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Li Zhuhao of China competes during Men's 100m Butterfly semifinal at 14th FINA World Swimming Championships (25m) in Hangzhou, east China's Zhejiang Province, on Dec. 12, 2018. (Xinhua/Xia Yifang)

Li Zhuhao of China competes during Men's 100m Butterfly semifinal at 14th FINA World Swimming Championships (25m) in Hangzhou, east China's Zhejiang Province, on Dec. 12, 2018. (Xinhua/Xia Yifang)