Ning Zetao of China competes during the men's 100m freestyle final at the 2015 FINA World Championships in Kazan, Russia, Aug. 6, 2015. Ning Zetao claimed the title with 47.84 seconds. (Photo: Xinhua/Dai Tianfang)
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Ning Zetao of China competes during the men's 100m freestyle final at the 2015 FINA World Championships in Kazan, Russia, Aug. 6, 2015. Ning Zetao claimed the title with 47.84 seconds. (Photo: Xinhua/Dai Tianfang)