Pedzisa mutsara unotevera: Chang akaita mutambo wake wekutanga weOlympic, semumhanyi muduku weSouth Korea (ane makore gumi nemana), kumaOlympics ezhizha ra2000 muSydney. Ikoko, akakundikana kuenda kumasemifainari mumitambo yake yega yega, achipedza makumi mana mu100 m freestyle (58.77), uye makumi mana nemumwe mu100 m freestyle.
50 m freestyle (26.88). Akaisawo gumi nemanomwe, senhengo yechikwata cheSouth Korea, mu4 × 100 m medley relay (4: 16.93).