Career
Cheung has been a lifetime civil servant and a former Commissioner of Customs and Excise. In 1998, he became the director of Hong Kong Economic and Trade Office. By 2001, Cheung promoted to Deputy Secretary for Works, then Commissioner of Insurance in 2006.
In 2009, he became Postmaster General of Hong Kong.
Cheung was appointed as Commissioner of Customs and Excise in 2011.