Hong Chengchou was originally a scholar, but when he saw the strength of the Qing army after the collapse of the Qing Dynasty, he told the hesitant generals that the peasant uprising army was not worth mentioning at all, so the Qing army could always strike those troops in Li Zicheng well, which also played an important role in the war.

Hong Chengchou was defeated by Huang Taiji in the Battle of Jinzhou four years ago and fell to the Qing Dynasty. He has been fighting the peasant uprising army all his life, and he knows the strength of the peasant uprising army very well, but those Qing troops who just entered the Central Plains are not clear, so he is still a little worried about the strength of the army fighting in the pain of the Ming Dynasty, so he called the fallen General Hong Chengchou to ask about the situation. After seeing the fighting capacity of the Qing army, Hong Chengchou shouted: "Li Zicheng hooligans are just a mob. How can they compare with my strong team of the Eight Banners?"

Hearing this, the Qing army was relieved. Dourgen personally led troops to most of the Eight Banners in Manchuria and Mongolia. In this way, peasant uprisings in many places were quickly put down, and the rule of the Ming Dynasty collapsed more quickly.

Dourgen led the Manchu army into Shanhaiguan, and the initial route was to bypass Shanhaiguan, because this was Wu Sangui's territory and they were invincible. However, I have to say that people are lucky. As soon as they went around, they saw that Wu Sangui and Li Zicheng were in cahoots. Was it just right to take advantage of the fishermen? Scared Wu Sangui to surrender directly to the Qing army, saving a lot of trouble. So, no matter what you say to Hong Chengchou, or the Qing army is strong, or he says nothing, the Qing army will know after a few battles.