(210731) -- TOKYO, July 31, 2021 (Xinhua) -- Kajetan Duszynski of Team Poland celebrates after winning the 4 x 400m relay mixed final at Tokyo 2020 Olympic Games, in Tokyo, Japan, July 31, 2021. (Xinhua/Jia Yuchen) - Jia Yuchen -//CHINENOUVELLE_XxjpbeE008535_20210731_MVPFN0A001/2107311603