With He Sanjiang and their recapture of Caozhou, their position in the Shandong territory was completely consolidated.

And just when He Sanjiang and their side were changing, the Qing Dynasty in the north was actually making frequent moves, and continued to exert pressure on the Ming border pass.

The matter of collusion with the Great Shun Dynasty, because of He Sanjiang's sudden rebellion, made the Qing people's calculations fail, although this may not affect the final goal of the Qing Dynasty, but for its offensive in the eastern border of Liaodong, it has a far-reaching impact.

Hong Chengchou, Lu Xiangsheng and other important ministers of the Ming Dynasty were entrusted with important tasks and trust by Chongzhen to sit on the border of Liaodong, which made the Qing Dynasty's large-scale march last year and was finally blocked from Shanhaiguan.

Of course, because the Mongols were subdued by the Qing Dynasty and other reasons, in addition to the Shanhaiguan line, the Qing people also had other clues to enter the customs.

It's just that, after all, the foundation of the Qing people is still in the huge cold and bitter land north of the Shanhaiguan in the northeast, if they rush to march from the Mongolian steppe into the Central Plains before defeating the heavy army of the Ming frontier on the first line of Shanhaiguan, then they are very likely to be smashed into the nest by the Ming army on the side of the Liao, so that the Qing people will steal chickens and rice, and instantly fall from a powerful empire to a rootless Ping.

This is also the most important reason why the Qing people conquered the Mongolian tribes over the years and annexed them into the children of the Eight Banners of the Qing Dynasty, except for harassing and invading the Ming Dynasty, they did not think about the most important reason why they drove straight into the Central Plains and marched into the Central Plains.

In this year, Emperor Chongzhen, who was supposed to go to the end at the beginning of the year, reached the end of the seventeenth year of Chongzhen, although his heart was full of sorrow and hardship, but he still lived in the Forbidden City of Shuntianfu.

Affected by it, although the Ming Dynasty's Liaoliao border pass was full of loopholes and frequently defeated for help, it also stood firm in the wind and rain, so that the idea of the Qing people entering the customs could not be realized for a long time.

There is also an important good news last year, that is, the founder of the Qing Dynasty, Emperor Taiji of the Qing Dynasty, died of illness, which brought a heavy blow to the people of the Qing Dynasty, and because of the sudden death of Huang Taiji, the military operation of the Qing Dynasty to attack Liao ended without a problem.

The newly appointed emperor of the Qing Dynasty is a six-year-old child__Aixin Jueluo. Fulin, fortunately, has the support of his imperial uncle, Prince Dorgon, which makes his throne stable, and will not be hollowed out by other Qing royal families, and even forced the palace to abdicate.

However, the young emperor of the Qing Dynasty should not know the world, and the control of the royal power naturally fell into the hands of Prince Dolgon, which also made the newly established Qing Dynasty taste a drama of imperial power and secret struggle.

Without the sudden rebellion and surrender of Wu Sangui, the general soldier of the Daming Mountain Customs in the original history, the battle for imperial power in the Qing Dynasty was resolved by the powerful and intelligent Prince Dolgon because of the impact of huge interests.

Therefore, when the seventeenth year of Chongzhen came to the end of the year and the heavy snow began to fall all over the sky, Dolgon, the prince of the Qing Dynasty, in order to divert the contradictions within the kingdom, brazenly decided to continue the unfinished business of the year, and the army sent out to conquer the Liao border pass.

This time the Qing Dynasty knocked on the gates, but it was not as cautious as when Huang Taiji was in power, and Prince Dolgon, who was younger and more adventurous, personally presided over the army, and his menacing and determined will was the only one in the Qing Dynasty for decades.

In the entire Qing Dynasty, after the children of the Eight Banners absorbed the Mongol tribes, the daily production force should not be more than 300,000, plus the Han and Korean people they absorbed, the total strength will never exceed 500,000.

But it was under such a premise that Dolgon integrated the fifteen soldiers of the Eight Banners of the Qing Dynasty, Manchu and Mongolia, as well as 100,000 Han troops and Korean army and auxiliary troops, and slaughtered them under the city of Shanhaiguan.

Although the Qing Dynasty failed to knock on the border pass of the Great Wall of Liaodong last year, it was also a blessing for the Qing Dynasty to uproot the two Ming army fortresses in Yongning and Jinzhou that were stationed outside the Liaodong Pass.

Without the Ningjin defense line outside the Qing Pass as the first line of defense of the Ming Dynasty, the most powerful and brave army of the Qing Dynasty could drive straight into the Ming Dynasty from the place outside the pass of Pingchuan to the Ming border pass without much effort.

Flags were unfurled outside Shanhaiguan, and the faces of the Ming officials below Hong Chengchou in the customs were covered with dark clouds, and the Qing army under the city was only in deep formation, which showed their great determination this time.

There are more than 200,000 Ming soldiers stationed in Shanhaiguan and the surrounding areas, if it is from the surface strength of the flash marriage, with a solid geographical advantage, they are also half a pound and eight taels of the Qing army under the city, and their strength is comparable.

It's just that sometimes the combat effectiveness of an army is strong or not, not just by looking at the gap in numbers, but also by the gap between the individual and overall strength of the army, and in this regard, the border army of the Ming Dynasty has been fighting with the Qing Dynasty for decades, but it is very clear in their hearts.

Hong Chengchou was worried, the loss of the two important towns of Ningjin last year, made the burden on his body heavier, although because of the situation, the ministers of the court and Emperor Chongzhen did not punish him too much for his defeat, but now if the Qing Dynasty breaks through the defense line of the Great Wall, then I am afraid that not only is his own black veil not thin, but with the character of Emperor Chongzhen, when the new hatred and old hatred are combined, it is very likely that everyone on his neck will move.

Although Hong Chengchou was a feudal official and had read poetry and books for decades, he was an honest pragmatist, and he never thought of doing anything for the country in his heart.

However, now after all, he is also an important minister with hundreds of thousands of troops, and his future has not yet reached the end of the mountain, so at this moment, his mind is more about planning his own government in his position, planning how to resist the invasion of the Qing people.

And now the only Ming Dynasty army still standing on the territory of the Qing Dynasty, there is only the Dongjiang Town soldiers such as Phi Dao, when the Qing Dynasty soldiers are under the Liaodong City, Hong Chengchou on the one hand to the imperial court to send an alarm, asking for support, on the other hand, in the name of the governor of Liaoliao, issued a strong order to Dongjiang Town Shang Kexi and others, let them go deep into the hinterland of the Qing Dynasty to make trouble, forcing the Qing army to return to defense.

Dongjiang Town Shang Kexi and others have also made moves, and the army under their command has attacked the Qing Dynasty coast several times, but the Qing Dynasty has personally inserted the only Ming army in their heart, as early as when Prince Dolgon decided to go south, he has already arranged heavy defenses along the Qing Dynasty, so that Shang Kexi and they dare not be careless.