China's Xu Jiayu competes during the men's 100m backstroke swimming final at the 17th FINA Aquatics World Championships held in Budapest, Hungary on July 25, 2017. Xu Jiayu won the gold medal in 52.44 seconds. (Xinhua/Ding Xu)
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China's Xu Jiayu competes during the men's 100m backstroke swimming final at the 17th FINA Aquatics World Championships held in Budapest, Hungary on July 25, 2017. Xu Jiayu won the gold medal in 52.44 seconds. (Xinhua/Ding Xu)
