
Li Jiao, coach of Li Jie of the Netherlands, questions a judge during the women's singles match against Ding Ning of China at the 2017 World Table Tennis Championships in Dusseldorf,Germany, June 2, 2017. (Xinhua/Tao Xiyi)

Li Jiao, coach of Li Jie of the Netherlands, questions a judge during the women's singles match against Ding Ning of China at the 2017 World Table Tennis Championships in Dusseldorf,Germany, June 2, 2017. (Xinhua/Tao Xiyi)