kˈeɪoʊ wˈɜːkt æz ɐ ɹˈɛzᵻdənt dˈɑːktɚɹ ɪnðə nˈæʃənəl taɪwˈɑːn jˌuːnɪvˈɜːsᵻɾi hˈɑːspɪɾəl ˈɛntˈʌ ˌɔːɹθəpˈiːdɪk sˈɜːdʒɚɹi dᵻpˈɑːɹtmənt fɹʌm nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt tə tˈuː θˈaʊzənd θɹˈiː.
Chao worked as a resident doctor in the National Taiwan University Hospital (NTUH) Orthopaedic Surgery department from 1998 to 2003.