Dr. Sun Yat-sen, the father of our country, once commented on Nanjing: Nanjing is the ancient capital of China, before Beijing. Its location is in a beautiful area. Its land includes mountains, deep waters and plains. It's hard to find such a beautiful place in a world metropolis. 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; In the Eastern Jin Dynasty, Xiao Liang and Liu Song were defeated in the Northern Expedition. At the beginning of the Southern Song Dynasty, ministers unanimously agreed to take Jiankang as the capital and restore the Central Plains. To their regret, Song Gaozong had no intention of the Northern Expedition, but made Jinling its capital. Even if the Taiping Heavenly Kingdom takes Nanjing as its capital, it is one of the mobilization bases and legitimacy to expel 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."
I think, firstly, the timing at that time, secondly, the significance of Nanjing to us China people, thirdly, the dehumanization of the Japanese invading army and so on, prompted the Japanese to go to the Holocaust. The landlord himself can continue to explore specific ideas.