Nanjing: referred to as "Ning", it was called Jinling, Jiankang and Jianye in ancient times. It is the capital of Jiangsu, a sub-provincial city, the core city of Nanjing metropolitan area, an important central city in eastern China, an important scientific research and education base and a comprehensive transportation hub in China. As of 20 18, there are 1 1 districts in the city, with a total area of 6,587 square kilometers and a built-up area of 97 1.62 square kilometers, making it the only mega-city in the Yangtze River Delta and East China. Nanjing is located in the east of China, in the lower reaches of the Yangtze River and near the river. It is the headquarters of China Eastern Theater Command, a national logistics hub, a shipping logistics center in yangtze river international, an important national gateway city driven by the Yangtze River Delta radiation, and an important node city where the eastern coastal economic belt and the Yangtze River economic belt meet strategically.
Nanjing is the first batch of national historical and cultural cities, an important birthplace of Chinese civilization, and has long been the political, economic and cultural center of southern China. It has blessed China several times in history and has a special position and value in the history of China. There were ancient human activities in Nanjing as early as100-1.20 thousand years ago, and there was Nanjing ape-man life in Tangshan 350 thousand-600 thousand years ago. With a history of more than 7,000 years of civilization, nearly 2,600 years of city construction and nearly 500 years of capital construction, it is known as "the ancient capital of the Six Dynasties" and "the metropolis of the Ten Dynasties".
In 229 AD, Sun Quan, Emperor Wu of China, established the capital here and renamed it Jianye. Since then, the rise of Nanjing has made China's political center out of the pattern of the Yellow River cultural plate, leading the development of the Yangtze River basin and even the whole southern China. Since then, Song, Qi, Liang and Chen of the Eastern Jin and Southern Dynasties have successively established their capitals here, so Nanjing is called "the ancient capital of the Six Dynasties". Today, there are Jiankang City ruins under Nanjing Library and Six Dynasties Museum. During the Six Dynasties, Jiankang City was the largest city in the world at that time, with a population of one million. It is the first city in the world with a population of over one million. China ancient culture was preserved in Nanjing by the Han nationality through the southern crossing of Yiguan. During the Six Dynasties, Nanjing and Rome were both called "the two centers of world classical civilization", and the culture of the Southern Dynasties, represented by Jiankang, had a far-reaching influence in human history.