
Usain Bolt (C) of Jamaica leaves the track with his teammates after he failed to finish the Men's 4x100m Relay Final on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017.(Xinhua/Han Yan)

Usain Bolt (C) of Jamaica leaves the track with his teammates after he failed to finish the Men's 4x100m Relay Final on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017.(Xinhua/Han Yan)