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China's Su Bingtian (3rd R) competes in the men's 60m final at the IAAF Indoor Grand Prix in Birmingham, Britain on Feb. 16, 2019. (Xinhua/Han Yan)

China's Su Bingtian (3rd R) competes in the men's 60m final at the IAAF Indoor Grand Prix in Birmingham, Britain on Feb. 16, 2019. (Xinhua/Han Yan)