Application and Development of Smart City in Guangdong, Hong Kong and Macao Greater Bay Area

With the acceleration of the global urbanization process, all countries and regions pay more and more attention to the sustainable development of cities. As of October 2021, 132 countries and regions have upgraded the goal of "carbon peak and carbon neutral" to a national strategy, and have proposed a vision of a zero-carbon future. The construction of a smart city has become an important factor in sustainable urban development. The special geographical location of Guangdong Hong Kong and Macao Greater Bay Area (hereinafter referred to as GBA) determines its development flexibility, and this region is bound to become one of the important development strategic regions in China. This paper selects the three core cities of GBA, Hong Kong, Guangzhou, and Shenzhen, as the research objectives, and to integrate, compare, and analyze the achievements of these cities in terms of smart cities. The research results can provide a reference for the construction direction of smart cities in other cities.