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Xie Wenjun of China competes during the men's 110m hurdles final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 2, 2019. (Xinhua/Li Ming)

Xie Wenjun of China competes during the men's 110m hurdles final at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 2, 2019. (Xinhua/Li Ming)