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China's Cai Yanyan competes during the women's singles 2nd round match against South Korea's Kim Ga Eun at the BWF World Championships 2019 in Basel, Switzerland, Aug. 21, 2019. (Xinhua/Li Jundong)
China's Cai Yanyan competes during the women's singles 2nd round match against South Korea's Kim Ga Eun at the BWF World Championships 2019 in Basel, Switzerland, Aug. 21, 2019. (Xinhua/Li Jundong)