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China's Li Na, member of Athlete Committee of the World Anti-Doping Agency (WADA), reacts during the closing ceremony of the World Conference on Doping in Sport in Katowice, Poland, Nov. 7, 2019. (Xinhua/Zhou Nan)
China's Li Na, member of Athlete Committee of the World Anti-Doping Agency (WADA), reacts during the closing ceremony of the World Conference on Doping in Sport in Katowice, Poland, Nov. 7, 2019. (Xinhua/Zhou Nan)