Ning Zetao of Henan competes during the men's 100m freestyle swimming heat at 13th Chinese National Games in north China's Tianjin Municipality, Sept. 3, 2017. Ning Zetao advanced to the semi-final with 49.44 seconds. (Xinhua/Wang Dongzhen)
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Ning Zetao of Henan competes during the men's 100m freestyle swimming heat at 13th Chinese National Games in north China's Tianjin Municipality, Sept. 3, 2017. Ning Zetao advanced to the semi-final with 49.44 seconds. (Xinhua/Wang Dongzhen)
