<prompt> Rambai muchinyora ndima iyi - Chang akakwanisa kumakwikwi evarume emamita 100 achimhanya neshiri  <response>: pamitambo yeOlympic yeZhizha ya2012 muLondon, nekupfuura nguva yeFINA B-standard yekupinda yemasekondi 52.45. Akadenha vamwe vanoshambira vanomwe mukupisa kwechitatu, kusanganisira mutambi weOlympic kanokwana kashanu Peter Mankoč weSlovenia, shasha yefreestyle relay Clement Lefert weFrance, uye aimbova mumhanyi weOlympic Ryan Pini wePapua New Guinea. Chang akamhanya kunzvimbo yechishanu nechikamu chezana chechipiri 0.01 shure kwaPini munguva yemasekondi 52.69. Chang akakundikana kuenda kumasemifinal, sezvo akaisa makumi maviri nematanhatu pakupedzisira mumakwikwi ekutanga. 