Six Dynasties is a collective term for six Han Chinese-ruled Chinese dynasties that existed from the early 3rd century AD to the late 6th century AD, between the end of the Han dynasty and beginning of the Sui dynasty. The Six Dynasties period overlapped with the era of the Sixteen Kingdoms, a chaotic warring period in northern China after the collapse of the Western Jin dynasty. The term "Wei, Jin, Southern and Northern Dynasties" is also used by Chinese historians when referring to the historical period of the Six Dynasties, although both terms do not refer to the exact same dynasties.

Nanjing is the capital of Jiangsu province in eastern China. It is a sub-provincial city, and a megacity. The city has 11 districts, an administrative area of 6,600 km2 (2,500 sq mi), and a population of 9,423,400 as of 2021. Situated in the Yangtze River Delta region, Nanjing has a prominent place in Chinese history and culture, having served as the capital of various Chinese dynasties, kingdoms and republican governments dating from the 3rd century to 1949, and has thus long been a major center of culture, education, research, politics, economy, transport networks and tourism, being the home to one of the world's largest inland ports. The city is also one of the fifteen sub-provincial cities in the People's Republic of China's administrative structure, enjoying jurisdictional and economic autonomy only slightly less than that of a province. Nanjing has been ranked seventh in the evaluation of "Cities with Strongest Comprehensive Strength" issued by the National Statistics Bureau, and second in the evaluation of cities with most sustainable development potential in the Yangtze River Delta. It has also been awarded the title of 2008 Habitat Scroll of Honor of China, Special UN Habitat Scroll of Honor Award and National Civilized City. Nanjing is also considered a Beta city classification, together with Chongqing, Hangzhou and Tianjin by the Globalization and World Cities Research Network, and ranked as one of the world's top 100 cities in the Global Financial Centres Index.