<prompt> Qedela umusho olandelayo: Eminyakeni emine kamuva, uChoi wafanelekela imicimbi emibili yokubhukuda kuma-Olimpiki Asehlobo ka-2012 eLondon ngokuqeda izikhathi zokungena ezijwayelekile ze-FINA A zika-2:13.00 i-200 m medley yomuntu ngamunye no-2:08.81 i-200 m butterfly kusuka kuFINA World Championships eShanghai, eChina. Emncintiswaneni wamamitha angama-200, uChoi waqeda isizini yesine endaweni yesithupha ngo-0.19 wesekhondi ngemuva kukaSophie Allen waseGreat Britain, wehlisa isikhathi sakhe se-Olympic saba ngu-2:14.91. Ubekwe endaweni engamashumi amabili nane emidlalweni yokuqala, futhi akazange aqhubekele phambili emidlalweni yokugcina. Ngokungafani nama-Olympics akhe adlule, uChoi wafaka isikhathi seshumi esisheshayo esingu-2:08.45 ku  <response>: I-butterfly yama-200m ukuze ivikele indawo yayo kuma-semifinals emqhudelwaneni wangakusasa. UChoi wehlulekile ukungena emdlalweni wamanqamu, njengoba aqeda umjaho wama-semifinal nesikhathi sesithathu esincane kunazo zonke esingu-2:08.32. 