
Geoffrey Kipkorir Kirui of Kenya competes during the men's marathon at the IAAF World Championships 2017 in London, Britain on Aug. 6, 2017. (Xinhua/Luo Huanhuan)

Geoffrey Kipkorir Kirui of Kenya competes during the men's marathon at the IAAF World Championships 2017 in London, Britain on Aug. 6, 2017. (Xinhua/Luo Huanhuan)