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China's Zhao Xintong looks on during the first round first session with England's Mark Selby at World Snooker Championship 2019 in Sheffield, Britain on April 22, 2019. (Xinhua/Jon Super)
China's Zhao Xintong looks on during the first round first session with England's Mark Selby at World Snooker Championship 2019 in Sheffield, Britain on April 22, 2019. (Xinhua/Jon Super)