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Liang Jingkun of China serves during the men's singles quarterfinal match against Ma Long of China at the 2019 ITTF World Tour Grand Finals in Zhengzhou, central China's Henan Province, Dec. 14, 2019. (Xinhua/Li Jianan)
Liang Jingkun of China serves during the men's singles quarterfinal match against Ma Long of China at the 2019 ITTF World Tour Grand Finals in Zhengzhou, central China's Henan Province, Dec. 14, 2019. (Xinhua/Li Jianan)