
Tao Yujia (2nd L) and Wei Yongli of Team China compete during Women's 4x100m Relay Heats on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Wang Lili)

Tao Yujia (2nd L) and Wei Yongli of Team China compete during Women's 4x100m Relay Heats on Day 9 of the 2017 IAAF World Championships at London Stadium in London, Britain, on Aug. 12, 2017. (Xinhua/Wang Lili)