Siu is the director of the Hong Kong Records, the largest Hong Kong local music retail shop.
Born in Guangzhou in 1948, Siu learned the violin after finishing primary school. He came to Hong Kong as a teenager and continued his violin training in the city and in the United States, becoming a professional violinist in the 1970s. Siu was the first generation of the Hong Kong Philharmonic Orchestra violinist. He is also one of the major international private collectors of violins.