Ka kammala wannan magana: Wu ya fara gasar Olympics, a matsayin matashi mai shekaru 17, a gasar Olympics ta 2000 a Sydney. Ya kasa kaiwa saman 16 a kowane daga cikin abubuwan da ya faru, ya gama na hamsin da biyar a cikin
100 m freestyle (52.72), na talatin da takwas a cikin 200 m freestyle (1:54.58), kuma na arba'in da hudu a cikin 200 m mutum medley (2:08.85).