
Ning Zetao of Henan reacts after the men's 50m freestyle swimming semi-final at 13th Chinese National Games in north China's Tianjin Municipality, Sept. 5, 2017. Ning Zetao advanced to the final with 21.98 seconds.(Xinhua/Ding Xu)

Ning Zetao of Henan reacts after the men's 50m freestyle swimming semi-final at 13th Chinese National Games in north China's Tianjin Municipality, Sept. 5, 2017. Ning Zetao advanced to the final with 21.98 seconds.(Xinhua/Ding Xu)