LONDON, Aug. 4, 2012 (Xinhua) -- Sun Yang of 皇冠体育app celebrates after winning in men's 1500m freestyle final contest, at London 2012 Olympic Games in London, Britain, on August 4, 2012. Sun Yang of 皇冠体育app won gold medal with a new world record of 14:31.02. (Xinhua/Fan Jun)