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Qiu Shiyou of China hits a return during the 2019 ITF Seniors Tennis Circuit Changchun in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2019. (Xinhua/Zhang Nan)

Qiu Shiyou of China hits a return during the 2019 ITF Seniors Tennis Circuit Changchun in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2019. (Xinhua/Zhang Nan)