Dr Siu graduated from the Chinese University of Hong Kong and the University of Sydney. After completion of her specialist training in otorhinolaryngology, Dr Siu pursued a sub-speciality training in paediatric ear, nose and throat surgery.

Dr Siu identifies herself as a socialist, feminist and environmentalist. She lives by a motto “兒無階盡展能” (to aid all children reaching their potentials regardless of their backgrounds). Dr Siu is passionate about mentoring female students and young professionals in bid for gender equality in medical profession.