Chinese General Chamber of Commerce
Tsang was born in Guangzhou, Guangdong, China on 17 May 1947. Tsang's father, Tsang Chiu-kan was a clerk at the Chinese General Chamber of Commerce, a pro-Beijing business organisation in the colony. He moved to Hong Kong when he was two years old and grew up in Sai Wan's Academic Terrace. Tsang received his primary and secondary education at St. Paul's College run by the Hong Kong Anglican Church. He studied Mathematics at the University of Hong Kong, graduating with first class honours.