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Xu Jiayu of Jiangsu-Zhejiang-Shandong-Hubei united team prepares before the mixed 4x100m medley relay final at the 2021 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, May 7, 2021. (Xinhua/Xu Chang)
Xu Jiayu of Jiangsu-Zhejiang-Shandong-Hubei united team prepares before the mixed 4x100m medley relay final at the 2021 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, May 7, 2021. (Xinhua/Xu Chang)