Consultant intensivist at the Hong Kong Children's Hospital
Honorary professor at the Department of Paediatrics, the Hong Kong Institute of Integrative Medicine, 
Honorary professor at Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong
President of the Hong Kong Society of Paediatric Respirology and Allergy
Vice President of the Hong Kong Paediatric and Adolescent dermatology Society
Published more than 400 peer-reviewed scientific papers, books and book chapters