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Liu Guoliang, coach of China watches the women's singles first round match at the 2017 World Table Tennis Championships in Dusseldorf, Germany, May 31, 2017. (Xinhua/Tao Xiyi)
Liu Guoliang, coach of China watches the women's singles first round match at the 2017 World Table Tennis Championships in Dusseldorf, Germany, May 31, 2017. (Xinhua/Tao Xiyi)