<prompt> Pedzisa mutsara unotevera: Pashure pokunge asipo kwemakore masere, Chang akakwikwidza mumitambo miviri bedzi paMitambo yeOlympic yeZhizha ya2008 muBeijing. Akawana FINA B-mitemo ye25.78 50 m freestyle uye 56.50 100 m freestyle kubva kuDong-A Swimming Tournament muUlsan. Mumakwikwi emamita zana akasununguka, Chang akakwikwidza nevamwe vatambi vanomwe mumakwikwi matatu, kusanganisira Arianna Vanderpool-Wallace ane makore gumi nemasere wekuBahamas. Akanyora zvakanakisisa zvehupenyu hwe55.96 kuti awane nzvimbo yechina uye makumi matatu nemasere zvachose ne0.34 yechipiri shure kweAustria Birgit Koschischek. Mu  <response>: Mumakwikwi emamita 50 akasununguka, Chang akaiswa pachinzvimbo chemakumi matatu nechimwe chete mumakwikwi ekutanga mangwanani. Achishambira mumakwikwi mapfumbamwe, akamhanyira kunzvimbo yechishanu nechikamu chezana chechipiri 0.01 shure kweCanada Victoria Poon muna 25.59. 