Xu Jiayu of the Hong Kong and Zhejiang joint team prepares for the men’s 4x100 freestyle relay, Sept. 1, 2017. (Photo: China News Service/Li Qing)
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Xu Jiayu of the Hong Kong and Zhejiang joint team prepares for the men’s 4x100 freestyle relay, Sept. 1, 2017. (Photo: China News Service/Li Qing)