He was elected to Council of the
City of Sydney in September 1991, the first Asian Australian to be elected to that council, and was also elected unopposed as the Deputy
Lord Mayor of Sydney. He faced re-election and was re-elected in September 1995 and continued as Deputy Lord Mayor Tsang served as
Parliamentary Secretary to the Premier and to the Treasurer on Trade and Investment until November 2009, when he was replaced by Premier
Nathan Rees after he failed to declare gifts and accommodation from Chinese-backed construction group Hightrade. He was a member of the General Purpose Standing Committee and was the Legislative Council Representative on the Senate of the University of Sydney in 2003 and 2004. ==Personal life==