Medical Officer, Regional Advisor in Occupational Health, World Health Organization Regional Office(s) for the Western Pacific since 1990. Medical Officer, Regional Advisor in Organization of Medical Care, World Health Organization, Philippines, since 1984. Director of International Organization, Department of Foreign Affairs, Ministry of Health, China, 1971-1984.
Deputy Director, Chinese Medical Mission, Guinea, 1968-1970. Medical Officer, Foreign Affairs Bureau(s), 1961-1968, Medical Officer, 1955-1961, Ministry of Health, China.