Career
Tsao was Secretary for Administrative Services and Information (行政司) and Secretary for Home Affairs (政務司) of colonial Hong Kong Government from 1985 to 1991. He was the first ethnic Chinese person to be in a secretary-level position during colonial administration. He was described as "Bad Boy Tsao" in headlines in 1986 when he was posted to Brussels as representative for Hong Kong trade relations with the European Union.
In 1950 he emigrated to Hong Kong where he was educated at Saint Joseph"s College, Hong Kong.
In 1955 he began working at the Royal Observatory as computing officer (grade III). He later worked as hygiene officer and assistant trade officer at the government.
In 1991 he retired. In 2005, he died in Thailand, aged 71.
1979 – Director of Trade, Industry and Customs
1981 – Director of Industry
1983 – Director of Information Services
1986 – Representative to Brussels
1986 – Secretary for Administrative Services and Information
1990 – Secretary for Home Affairs (4th ranked).