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Xie Zhenye of China gestures before the men's 100m heat at the 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Li Ming)

Xie Zhenye of China gestures before the men's 100m heat at the 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Li Ming)