Although his graffiti was repeatedly painted over, he often returned to re-apply his messages as soon as the paint dried. At the height of his graffiti career, his obsessive marking of territory made his graffiti an ever-present aspect of the streets of Hong Kong. The graffiti has been spotted at many places on the streets of Hong Kong, ranging from lampposts, utility boxes, pillars, pavements, street furniture, and building walls, to an occasional car. The contents of his calligraphic graffiti usually include his name, his title (Emperor or King of Kowloon, Hong Kong, or China), his family tree (a variable list of about 20 individuals), the names of illustrious emperors, and the exclamation, "Down with the Queen of England!"His complaints about the supposed misappropriation of his land were not always so formulaic, however. He occasionally demanded that the government pay him land taxes.
He died on 15 July 2007 following a heart attack in Hong Kong. He was 85. Art critic Lau Kin-wai said Tsang spent his final days at an elderly home surrounded by family members. He also said that Tsang's last wish was for another exhibition of his work.Wikipedia