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China's Chen Long celebrates a point during the men's singles first round match against Malaysia's Lee Zii Jia at China Open 2019 badminton tournament in Changzhou, east China's Jiangsu Province, Sept. 17, 2019. (Xinhua/Li Bo)

China's Chen Long celebrates a point during the men's singles first round match against Malaysia's Lee Zii Jia at China Open 2019 badminton tournament in Changzhou, east China's Jiangsu Province, Sept. 17, 2019. (Xinhua/Li Bo)