This lecture introduces the basic situation of the Guangdong-Hong Kong-Macao Greater Bay Area (GBA), one of China's national strategies. Prosperous bay area economies, represented by the New York Bay Area in the US and Tokyo Bay Area in Japan, have been growing and attracting worldwide attention. Nowadays, as a rapidly rising economy and the world's second-largest economy, China has been constructing three major bay areas including the GBA. Compared with other bay areas at home and abroad, the GBA enjoys its unique feature of covering two different sociopolitical systems, three independent customs territories, and three jurisdictions. Therefore, the GBA is not only economically significant but also is a grand experiment for China’s political system and social governance.