Mezue ahịrịokwu na-esonụ: Chang mere egwuregwu Olympic mbụ ya, dị ka onye na-egwu mmiri nke South Korea nke kachasị nta (afọ 14), na 2000 Summer Olympics na Sydney. N'ebe ahụ, ọ gara n'ihu na ọkara ikpeazu na nke ọ bụla n'ime ihe omume ya, na-emecha nke iri anọ na 100 m freestyle (58.77), na nke iri anọ na otu na
50 m n'ụdị nnwere onwe (26.88). O tinyekwara nke iri na asaa, dịka onye otu ndị otu South Korea, na 4 × 100 m medley relay (4: 16.93).