Since the inception of the"Guangdong-Hong Kong-Macao"Greater Bay Area initiative,the concept of"bay area"has attracted increasing attention from both academic circles and broader society.This paper argues that the regional cooperative structure of the"Guangdong-Hong Kong-Ma-cao"Greater Bay Area needs to be further clarified in the context of this region.While reviewing the regional synergy mechanisms of New York,San Francisco,Tokyo and the Sydney Bay Area,this pa-per focuses on the regional synergy experience of the Greater Sydney Bay Area.On this basis,this pa-per puts forward the idea of con...