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Xu Xin of China returns the ball during the men's singles round of 32 match against An Jaehyun of South Korea at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany, on Jan. 30, 2020. (Photo by Zhang Ping/Xinhua)

Xu Xin of China returns the ball during the men's singles round of 32 match against An Jaehyun of South Korea at the 2020 ITTF World Tour Platinum German Open in Magdeburg, Germany, on Jan. 30, 2020. (Photo by Zhang Ping/Xinhua)