Artist Siu Leung-hing putting his stamp on iconic images

There is a wry sense of irony in Siu Leung-hing's artworks - mosaics created using hundreds of stamps.

Look closely at the striking portrait of Mao Zedong and you can see he is made out of stamps bearing the head of Queen Elizabeth.

A brightly coloured Mona Lisa is fashioned out of stamps paying homage to the rather sombre-hued original in the Louvre.

Siu, a 58-year-old police clerk, has also created a cartoon image of a policeman out of some 1,000 used postage stamps depicting Chinese chess and the Hong Kong landmarks - representing the strategic task of policing the city.

Siu, who has been collecting stamps since he was a boy, began creating his mosaics after the handover in 1997 as a way of using up stamps bearing the British queen's head which were no longer valid and were not part of collectible sets.

He said: "The subject of the image is really up to and limited by the colour schemes available in my stamp collection.