Ao Man-long was born in Macau in December, 1956, and studied in Taiwan in the late 1970s. He graduated from the National Taiwan University in 1982 with a bachelor's degree in engineering and later received a master's degree in business management from the University of Macau. Mr Ao joined the Macau government in 1987 as an engineer and worked in various departments before being promoted to director of the public hygiene department in the colonial administration. In 1992, he was transferred to the incineration and sewage treatment centre, where he became director in 1998. On December 20, 1999, Mr Ao became the secretary for transport and public works in the post-handover administration of Chief Executive Edmund Ho Hau-wah. The portfolio put Mr Ao in charge of infrastructure, land disposal, transportation, telecommunications, energy, social housing and environmental protection. He is also president of Macauport, a port management company; a senior member of the Chinese Mechanical Engineering Society; as well as a member of the China Society for High Technology and Industrialisation. He is also a member of the Macau government's science, technology and innovation committee.