Nanjing is the capital of Jiangsu, a province in East China. The city, which is located in the southwestern corner of the province, has 11 districts, an administrative area of 6,600 km (2,500 sq mi), and as of 2021 a population of 9,423,400.Situated in the Yangtze River Delta, 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. 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 (global second-tier) 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.
As of 2021, Nanjing has 68 institutions of higher learning, including 13 double-first-class universities, ten 111-plan universities, eight 211 universities, and 97 academies. Nanjing University, which has a long history, is among the world's top 10 universities ranked by the Nature Index. The ratio of college students to the total population ranks No.1 among large cities nationwide. Nanjing has the fifth-largest scientific research output of any city in the world. As of 2024, it has been ranked as the world's second most prolific scientific research center in earth and environmental sciences and the world's third most prolific scientific research center in chemistry and physical sciences, according to the Nature Index.
