 Han Choi akaberekwa musi waMay 20, 1989 mutambi wekushambira wekuMalawi. Choi akava mumwe wevatambi vekutanga vekuMalawi kukwikwidza kumaOlympics ezhizha ra2004 muAthens. Akakwanisa kumakwikwi evakadzi emamita 50 akasununguka, nekugamuchira nzvimbo yeUniversality kubva kuFINA munguva yekupinda ye32.33. Akadenha vamwe vatanhatu vanoshambira mumakwikwi maviri, kusanganisira vane makore gumi nemana Sameera Al-Bitar weBahrain naChristal Clashing weAntigua neBarbuda. Akanyora zvakanakisisa zvehupenyu hwe31.62 kuti awane nzvimbo yechina ne0.62 yechipiri shure kwevakundi veAl-Bitar naGhazal El Jobeili veLebanon. Choi akakundikana kuenda kumasemifinal, sezvo akaisa makumi matanhatu nemapfumbamwe pakupedzisira pazuva rekupedzisira rekutanga. 