After 5 17 years, Li Zicheng invaded Beijing, and Emperor Chongzhen hanged himself. The imperial clan of the Ming Dynasty established several regimes in the south, all of which were short-lived, with a total of only forty years.
In ancient China, several ways of regime change were abdication, reform and inheritance. Except for these three ways of inheritance, other ways of inheritance are not very legitimate, of course, if you have enough rights, it counts.
After the demise of the Northern Song Dynasty, Kang Wang and Zhao Gou inherited the Song Dynasty, and Zhao Gou was Song Huizong's ninth child. Of course, people can't speak in their own capacity. But Nanming is different. The person who inherited the Ming regime was Emperor Hong Guang. Although he is the grandson of Ming Shenzong, his status is still far away.
After the demise of the Northern Song Dynasty, although the State of Jin acquired some land in the Central Plains, it had no intention to rule or manage the Han people. Even if they do, they don't have enough patience and experience. In the end, under the resistance of rebels in the Central Plains, Xu Jin had to flee to the north.
However, the situation facing Nanming is different. Unlike Xu Jin, the Qing Dynasty did not give up the land it occupied, but adopted appeasement, put itself in the position of savior and showed kindness to the people of the Ming Dynasty. It was not until Nanming was solved that unscrupulous violence began to be suppressed.
Most importantly, although the Northern Song Dynasty was destroyed, the people still had some money, so when Zhao Gou started fighting, the military expenditure was guaranteed. The situation in Nanming at that time, to put it bluntly, was the kind of black-hearted boss who only talked about ideals and didn't talk about money. In that case, dreams can't be eaten, and it is reasonable for Nanming to perish again.