Nanjing, referred to as "Ning", was called Jinling and Jiankang in ancient times. It is a prefecture-level city, provincial capital, sub-provincial city, megacity and core city of Nanjing metropolitan area under the jurisdiction of Jiangsu Province. It is an important central city, an important scientific research and education base and a comprehensive transportation hub in eastern China approved by the State Council. By 2020, the city will have 1 1 districts with a total area of 6587.02 square kilometers.
Historically, Nanjing has benefited and suffered from its unique geographical location and extraordinary geomantic scenery. In the past, Nanjing suffered many military disasters, but it also rebuilt its prosperity from the ruins many times.
When China was occupied by foreigners and the Han nationality was about to suffer extinction, the Han nationality usually chose Nanjing to recuperate and aspire to the Northern Expedition and restore China. Daming and the success of the second Northern Expedition in the Republic of China; The Eastern Jin Dynasty, Liu Song Dynasty and the Three Northern Expeditions failed.
At the beginning of the Southern Song Dynasty, all the ministers talked about taking Jiankang as the capital to restore the Central Plains. They regretted that Song Gaozong had no intention of the Northern Expedition and decided to go to Lin 'an, but forced by public opinion, they decided to make Jinling the capital. Taking Nanjing as its capital is also one of the mobilization bases and justifications for expelling alien rule.
Therefore, Nanjing is regarded as the revival place of the Han nationality and has a special position and value in the history of China. Therefore, after comparing the four ancient capitals of Chang 'an, Luoyang, Jinling and Yanjing, Mr. Zhu Dai said: "These four metropolitan cities are rich in literature, handsome in people, beautiful in mountains and rivers and magnificent in weather, which is closely related to the national crisis, especially Jinling."