A piece of calligraphy by Tsang Tsou-choi - the graffiti artist who called himself the 'King of Kowloon' - has been sold by Sotheby's for $55,000. The art work is accompanied by a photo of Tsang's street calligraphy taken by Lau Kin-wai, a long-time friend of the artist. It was sold at an auction held by Sotheby's in Admiralty yesterday. After hearing the news, the 83-year-old Tsang, who is wheelchair-bound and lives in a home for the elderly, said: 'Is my art worth that much?' Mr Lau who, put up the work for auction, said it's a sign of how valuable Tsang's calligraphy is to Hong Kong. 'While the Museum of Art rejected his works and said they're too controversial, this prestigious auction firm proves it's not so,' he said. The bid for Tsang's work started at $10,000 and it escalated rapidly to sell for $55,000 in less than a minute. The buyer, who identified herself only as Mrs Hong, said she was a first-time bidder. Mr Lau said putting Tsang's work up for auction not only proved how important his art was, but would help improve his living conditions. 'I want to get an electronic wheelchair,' said Tsang. Mr Lau said part of the money would be used for an exhibition of the eccentric artist's works. The rest will go directly to Tsang. Mrs Hong said 'I know the money's for helping Tsang, and also his artworks really represent Hong Kong. That's why I bought it.' Tsang became an itinerant graffiti artist about 50 years ago and is reputed to have been detained by every single police station in Hong Kong. He wrote his graffiti anywhere he could, and would even get into run-ins with pedestrians. Delighted as he was at news of the Sotheby's sale, Tsang continued with his most important daily activity even if it was no longer on the streets: writing calligraphy. Mr Lau said the artist covered one to two pieces of 50cmx80cm paper with his calligraphy everyday. Tsang still writes like a master calligrapher - with steady hands. He focuses on writing out the names of the members of his family, never failing, of course, to give them royal titles. Mr Lau said he would consider putting more of Tsang's works up for auction, but would donate them to the Museum of Art if it finally accepted them.