Chinese swimmer Ning Zetao tests water with his teammates during a training session in Rio de Janeiro's Olympic Aquatics Stadium in Brazil on July 31, 2016, as the team prepares for the upcoming Rio Games. [Photo/Xinhua]
2016年7月31日，中國游泳隊隊員寧澤濤正和隊友們試水。當天，中國游泳隊在里約奧林匹克水上項目體育館備戰奧運。