Opening ceremony of 2019 IAAF World Athletics Championships held in Doha(1/4)

IAAF President Sebastian Coe is about to address the opening ceremony of 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Wang Jingqiang)

Qatari Emir Sheikh Tamim Bin Hamad Al-Thani (C), IAAF President Sebastian Coe (R) and IOC President Thomas Bach (L) attend the opening ceremony of 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Wang Jingqiang)

Representatives of athletes attend the opening ceremony of 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Wang Jingqiang)

A volunteer takes selfies at the opening ceremony of 2019 IAAF World Athletics Championships in Doha, Qatar, Sept. 27, 2019. (Xinhua/Wang Jingqiang)