On April 7, 1644, the Manchurian nobles mobilized soldiers and horses, hundreds of thousands of people poured out of the nest, under the command of the regent Dorgon, to the south, the original plan was to bypass Shanhaiguan, break through the Great Wall, and prepare for fierce battle.
At that time, although the Chongzhen Emperor had martyred himself in coal mountains, after all, he had a million troops, and when the Qing army entered the pass, the Ming generals and Zhu Mingzong would still gather troops to fight, in addition, the Qing army was also facing two fierce enemies, Li Zicheng and Zhang Xianzhong, the commander of the Dashun and the Great Western peasant army, and it was not easy for the Qing army to enter the Central Plains.
In the ninth of April, the Envoy of Shaanxi Province, who had already surrendered to the Qing Dynasty, led an army of 100,000 troops from Dolgun to attack Ming in a large-scale southward attack on the Ming Dynasty, and arrived at the Liaohe River on the eleventh, but on April 15, Dolgun received a "beggar master" letter from Wu Sangui, the general of the Ming Liaodong Army, who was guarding Shanhaiguan in The town of Guanhou.
Dorgon's joy at that time could be imagined, and he immediately changed his route to Shanhaiguan, which was "the first pass in the world" and had "the throat of the border county and the protection of the beijing division". And relying on Wu Sangui, Li Zicheng was frustrated, and the Qing army entered the Central Plains in large numbers.
On the second day of the first month of May, Dorgon entered Beijing from Chaoyangmen with Qing troops, and the officials and gentlemen in Beijing at that time did not know that Wu Sangui had surrendered, mistakenly believing that Wu Jun had defeated the Dashun army, recaptured the Ming crown prince Zhu Cixiu, and was about to return to Beijing to take the throne, and prepared the emperor's halogen book to drive out of the city to welcome.
But it was Dolgun who came, and for a time the city of Beijing fell into chaos. However, due to the fact that when the Qing army entered the customs, Hong Chengzu had already made a statement, not to loot or shave his hair, to mourn for the Chongzhen Emperor, in order to win the favor of the Han gentry, he could quickly stabilize the situation, Dolgun took this advice, and the results were good.
Later, Hong Chengzu was ordered to recruit Jiangnan, suppress the anti-Qing rebel army in Jiangnan, behead the righteous soldiers who supported the Ming King's room, and when he persuaded Zheng Zhilong to surrender and successfully march into Fujian, he was also known as the "first merit of the Kaiqing", and Hong Chengzu's mother and brother Hong Chengyu could not help but rebuke him for disloyalty when he saw this.
In addition to Wu Sangui and Hong Chengzuo, there was also a third person who was Qing Ping Ding Zhongyuan, but many people in later generations did not know this person very well, he was Sun Kewang.
Sun Kewang had followed Zhang Xianzhong in the Chongzhen rebellion, Xiao Yong was good at war, and his ability was outstanding, so he was named the general of Pingdong, in 1646, the Qing army entered Sichuan, and in January of the following year, Zhang Xianzhong was shot dead by Hauge, the Prince of Qinghe Shuosu, at the Phoenix Mountain in Xichong, and Sun Kewang took the rest into the Yungui region and claimed the title of king.
After that, the Qing army and Sun Kewang fought many battles, but both were defeated, but Sun Kewang and Li Dingguo, the remaining leader of the Great Western Army, had a disagreement on the issue of jointly fighting against the Qing, Sun Kewang advocated intercourse with the Southern Ming army, and after losing defeat, he transferred to the South China Sea, while Li Dingguo advocated moving west into Yunnan, establishing a base area, and jointly resisting the Qing.
Although the Great Western Army was originally a peasant rebel army that rebelled against the Ming Dynasty, they also could not see that the Qing army was stationed in the Central Plains, and the internal people's hearts were the idea of returning to Li Dingguo, and Sun Kewang had to agree, but he was unhappy with Li Dingguo, and after Li Dingguo's great military achievements, the prestige was above Sun Kewang, and Sun Kewang wanted to get rid of Li Dingguo.
In 1657, after the great battle between Sun Kewang and Li Dingguo, the army was defeated and surrendered to the Qing, sun Kewang was very favorable to the Qing, and when Sun Kewang arrived in Beijing the following year, the Qing court ordered Ji Du, the prince of Heshuojian, and Yue Le, the prince of Heshuo'an, to lead a large number of high-ranking officials to go out of the city to greet them, and the scene was very solemn.
Because Sun Kewang betrayed the military situation, Li Dingguo and the southwest anti-Qing forces eventually failed. However, after the Qing Dynasty was stabilized in the Central Plains, Sun Kewang and Wu Sangui had no use value and were eventually picked up by the Qing court.