Guangdong-Hong Kong-Macao Greater Bay Area (hereinafter referred to as Greater Bay Area (GBA)), including Hong Kong Special Administrative Region, Macao Special Administrative Region, Guangzhou, Shenzhen, Zhuhai, Foshan, Huizhou, Dongguan, Zhongshan, Jiangmen and Zhaoqing (hereinafter referred to as the nine cities in the Pearl River Delta), has a total area of 56,000 square kilometers and is an open place in China. Building Guangdong-Hong Kong-Macao Greater Bay Area is not only a new attempt to promote the formation of a new pattern of all-round opening to the outside world in the new era, but also a new practice to promote the development of "one country, two systems".