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Ng Ka Long Angus of China's Hong Kong competes during the men's singles third round match against Chen Long of China at the BWF Badminton World Championships 2019 in Basel, Switzerland, Aug. 22, 2019. (Xinhua/Li Jundong)

Ng Ka Long Angus of China's Hong Kong competes during the men's singles third round match against Chen Long of China at the BWF Badminton World Championships 2019 in Basel, Switzerland, Aug. 22, 2019. (Xinhua/Li Jundong)