
Seto Daiya of Japan competes during men's 400m medley swimming final at the 17th FINA World Championships in Budapest, Hungary on July 30, 2017. (Xinhua/Ding Xu)

Seto Daiya of Japan competes during men's 400m medley swimming final at the 17th FINA World Championships in Budapest, Hungary on July 30, 2017. (Xinhua/Ding Xu)