Buuxi weedha soo socota:
ragga 100 m balastar ee Olombikada Xagaaga ee 2012 ee London, isagoo dhaafiyay waqtiga gelitaanka caadiga ah ee FINA B ee 52.45 ilbiriqsi. Wuxuu la tartamay toddobo dabaalyahan oo kale heerka saddexaad, oo ay ku jiraan Peter Mankoč oo shan jeer ku guuleystay Olombikada Slovenia, horyaalkii dabaasha ee freestyle Clement Lefert oo reer France ah, iyo ciyaaryahankii ugu dambeeyay ee Olombikada Ryan Pini oo ka yimid Papua New Guinea. Chang wuxuu ku tartamay kaalinta shanaad boqolkiiba ilbiriqsi (0.01) gadaal Pini waqti 52.69 ilbiriqsi ah. Chang wuxuu ku guuldareystay inuu u gudbo semi-finalka, maadaama uu kaalinta lix iyo labaatanaad ka galay guud ahaan heerarka hordhaca ah.