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China's Xie Zhenye (2nd R) competes during the men's 100m heat at the 2019 IAAF World Athletics Championships in Doha, Qatar, on Sept. 27, 2019. (Xinhua/Jia Yuchen)
 
 
China's Xie Zhenye (2nd R) competes during the men's 100m heat at the 2019 IAAF World Athletics Championships in Doha, Qatar, on Sept. 27, 2019. (Xinhua/Jia Yuchen)