Tsang, Donald Yam-kuen, 1944–, Hong Kong government official and political leader. He joined the Hong Kong colonial civil service in 1967, and served in a variety of posts concerned with the economy and trade; he also worked on Hong Kong's transfer from British to Chinese rule. In 1995 he was appointed Hong Kong's financial secretary; he was knighted in 1997 for his services to the colony. Tsang remained financial secretary after Hong Kong's transfer (1997) to China, becoming chief secretary for administration in 2001. When region's chief executive, Tung Chee-hwa, resigned in 2005, Tsang succeeded him, as acting chief executive until he was elected to the office. He was reelected in 2007.