Compared with the establishment of the Yuan Dynasty, the establishment of the Qing Dynasty was very arbitrary. First of all, Manchu is not a powerful nation, and the Ming Dynasty is also a powerful dynasty different from the Song Dynasty. However, the corruption of officials in the late Ming Dynasty almost developed under the nose of Liaodong fighters in the Ming Dynasty.

Nurhachi, the outstanding leader of the post-Jin regime, led the post-Jin through the most difficult time, just as he was in high spirits and wanted to capture the Ming border. In the first world war of Ningyuan, Yuan Chonghuan defeated Houjin, and a shelling tripped Houjin Khan and coach Nurhachi. Nurhachi was seriously injured and died soon.

In fact, at the end of Nurhachi's rule, the post-Jin regime was already full of contradictions, and the policy of treating Han people more cruelly was triggered by grassroots riots. At the same time, the top leaders are fighting for power and profit, fighting in secret and intrigue. Nurhachi's helpless implementation of the four Baylor joint ruling system did not fundamentally solve the problem.

Just when Nurhachi was unable to maintain the situation, Huang Taiji, a clever successor, adopted the Huairou policy, which catered well to the mentality of the Han people and treated the internal nobles in a way of spoiling or killing, thus stabilizing the interior.

History came to a crossroads at this time. After repeated choices, Wu Sangui, who owns 50,000 fighters in Ning Guan, finally settled down and helped Dourgen defeat Li Zicheng's elite in Shanhaiguan. Once the Qing army entered the customs, there was no possibility of change. Li Zicheng was a fugitive, too, and eventually he died miserably.

In the process of winning the Central Plains, the Qing Dynasty even had some luck. However, at the crossroads of historical turning point, it is never a simple data comparison. Whoever is more enterprising, who can seize the opportunity better, may complete a gorgeous turn.