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Liu Shiwen of China serves during the women's singles quarterfinal match against Mu Zi of China at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 2, 2017. (Xinhua/Tao Xiyi)
Liu Shiwen of China serves during the women's singles quarterfinal match against Mu Zi of China at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 2, 2017. (Xinhua/Tao Xiyi)