 Following his studies, he was admitted to the Supreme Courts in Hong Kong (1976), the UK (1983) and Victoria, Australia (1985), and afterwards has been in private practice.In his legal function, he participates in governmental advisory boards and committees of the Government of Hong Kong, including
In 2000, Hui was awarded the Medal of Honour by the Government of Hong Kong, and on 2004-07-01 he was appointed to the honorary title of Justice of the Peace.After being the external legal advisor of the Glorious Sun Enterprises, a 3.8 billion Hong Kong dollars (USD 500 million) investment holding company focusing on casual apparel, he joined the group in 1995 as an Executive Director.