
Su Bingtian (3rd, L) of China reacts after the men's 4x100m relay final on Day 9 at the IAAF World Championships 2017 in London, Britain on Aug. 12, 2017. (Xinhua/Han Yan)

Su Bingtian (3rd, L) of China reacts after the men's 4x100m relay final on Day 9 at the IAAF World Championships 2017 in London, Britain on Aug. 12, 2017. (Xinhua/Han Yan)