The Guangdong-Hong Kong-Macao Greater Bay Area (GBA) consists of the Hong Kong SAR, Macao SAR, and nine cities in Guangdong (namely Guangzhou, Shenzhen, Zhuhai, Foshan, Huizhou, Dongguan, Zhongshan, Jiangmen and Zhaoqing) with a total area of 56,000 square kilometers.

With less than 0.6% of China's area, the GBA contributes 12% of the country's GDP. By the end of 2020, the total economic volume of the GBA had reached 11.5 trillion yuan. In detail, the GDP of nine cities in Guangdong is about 9 trillion yuan, and the GDP of Hong Kong and Macao is about 2.7 trillion Hong Kong dollars, and 194.4 billion Macao patacas, respectively.