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Ma Long of China serves during a men's singles round of 16 match against Jeoung Youngsik of South Korea at the 2019 ITTF World Tour Grand Finals in Zhengzhou, central China's Henan Province, Dec. 13, 2019. (Xinhua/Li An)
Ma Long of China serves during a men's singles round of 16 match against Jeoung Youngsik of South Korea at the 2019 ITTF World Tour Grand Finals in Zhengzhou, central China's Henan Province, Dec. 13, 2019. (Xinhua/Li An)