Emperor Chongzhen secretly sent the eunuch Zheng Zhihui to Jinzhou to cooperate with Lu Shanji and engage in fake peace with the Houjin State, of course, he had his own purpose.

This purpose was to lure Huang Taiji, as in history, to lead a large army to make a detour through Mongolia and come to attack the Great Wall fortress on the front line of Jizhen or Xuanfu.

Originally, in history, Emperor Chongzhen and his ministers never thought that Jianyu would avoid the Ningjin defense line outside the Shanhai Pass, make a detour through Mongolia, and suddenly appear outside the Great Wall of Jizhen under the leadership of the Karaqin people.

Another evil consequence of the manpower, material and financial resources that have been invested in Liaodong for many years is the emptiness of defense outside Jizhen.

Not only did the Jianchang camp, the Santun camp and the border guards all withdraw to the Great Wall for resettlement, but the Great Wall barrier itself, which relied on to protect the safety of Gyeonggi, was also in disrepair and collapsed everywhere.

In addition, the guards along the border were slack, and the training and equipment of the battalion were backward, and as a result, they could not stop the onslaught of the army that was not built.

All of this combined led to the invasion of Jianyu in the winter and October of the second year of Chongzhen's original history.

Now since the crossing of the Emperor Chongzhen, he has been worried about the things that he has never forgotten, and at the same time, he is also the most afraid of repeating the mistakes of history, that is, the army of Jianyu broke through the border from the Zunhua area of the Great Wall of Jizhen as in history.

Many of the measures he took were to prevent the construction of a large army, once again making a mess of the Gyeonggi Heavy Land of the Ming Dynasty, and completely shattering the image of the lord of Zhongxing, which his predecessor Emperor Chongzhen had worked so hard to establish.

It is precisely because of this fear hidden in his heart that he will always insist on placing the Ma Shilong Division, the first town of the Guards, which has been trained, in the land of Gyeonggi.

No matter how fierce the war in the northwest was to encircle and suppress the thieves, no matter how protracted the war in the southwest to quell the rebellion of luxury, and no matter how the generals and soldiers below Ma Shilong, the first town of the Guards, took the initiative to ask for battle, now the Chongzhen Emperor refuses to let the first town of the Guards leave the land of Gyeonggi for half a step.

All this, of course, has some other considerations.

For example, to ensure the smooth progress of the reform and reorganization of the three major battalions of the Beijing Division, to ensure the smooth progress of various major policies and policies above the court, and so on.

However, guarding against the sudden arrival of the army of Jianyu has always been the primary reason.

It is not that no one has suggested that in the war to suppress bandits in the northwest or to suppress the rebellion in the southwest, the new Guards should be put into use.

Niu Juming, who was one of the staff members of the Ministry of War, even suggested that a part of the first town of the Guards Army should be directly transferred to Liaodong or Korea to fight, so that on the one hand, the effect of the new army's training could be tested, and on the other hand, it could also give Jianyu a direct blow.

Such a suggestion makes a lot of sense.

But Emperor Chongzhen still thinks that the time is not right and the time is not ripe.

As for when the time was ripe, Niu Juming didn't dare to ask, and Emperor Chongzhen didn't tell him.

In Niu Juming's view, Emperor Chongzhen's worries about Jianyu breaking through the border from the north of Gyeonggi and thus invading the Gyeonggi region were superfluous.

If it is very possible before Burhatu brought the Karaqin Department to the Ming Dynasty, then after Burhatu accepted the canonization, became the king of the Ming Dynasty, and became the commander of the Ming Ulan Hada Command Division, this possibility is very small.

Especially when Cao Wenzhao, a fierce general, built Rehe Fort on the bank of the Wulie River, and was appointed by Emperor Chongzhen as the guard of Rehe Town, with the strong existence of the Wulie Battalion, the possibility of Jianyu attacking Gyeonggi from outside the edge of Jizhen is even more minimal.

Not to mention that Sun Chengzong, the Minister of Military Aircraft, patrolled the border twice, and at this time he was still inspecting the defense in the area of Rehe Fort.

Along the line from Shanhaiguan to the edge of Jizhen, in addition to Rehe Fort, the once abandoned side wall fortresses such as the Dushi Fort outside the Dushikou of Xuanfu Town, the Gushan Fort on the Dagu Mountain outside the Xifeng Mouth of Jizhen Town, and the Sanchakou Fort outside the Taolinkou and on the bank of the Qinglong River have been built and restored one by one.

The use of cement concrete, a new weapon for building cities by the Ming army, and the addition of fortresses, a new method of building cities, have made today's border castles as solid as a rock.

If there were no Shenwei invincible general cannon that was currently only equipped by the Ming official army, that is, the largest and largest caliber Hongyi cannon, then these fortresses outside the pass were not at all easily breached by the army of Jianyu or the army of the Mongols.

With this series of strong fortresses outside the edge of Jizhen, as well as Ulan Hada, three towers and two fortresses farther north, the slave chief Huang Taiji can only sigh at Guanxing even if he leads more Jianyu and Mongolian iron cavalry to come.

Therefore, Niu Juming, who is familiar with the border defense of Jizhen, really can't understand what Emperor Chongzhen is worried about when he puts the first town of the Guards in Gyeonggi and does not dare to move lightly.

But fortunately, Niu Juming is a smart person, and after making several suggestions on the side, seeing that the emperor did not accept it, he no longer looked for boredom, but devoted his energy to the production of the terrain sand table in the three provinces of the two capitals of the Ming Dynasty and the surrounding regions.

Since receiving this task, Niu Juming, with the support of the emperor, has sent all the elite soldiers and strong generals of the Ministry Division to the coast and along the border to survey the terrain and geomorphological characteristics on the spot, and then carefully supplement and revise the giant Ming Quanyu terrain sand table in the Wuying Palace.

Regarding the suggestions of Niu Juming and some other people in the court, Emperor Chongzhen did not understand what they meant.

These people thought that they had never fought or seen blood since the formation of the first town of the Guards, they did not know how effective the training was, they did not know whether they could fight, and they stayed in the land of Gyeonggi without moving, and they only practiced three times in winter and three times in summer, but they never let their swords come out of the sheath, and in the end it was just a waste of money and food.

However, what they ignore is that the establishment of the first town of the Guards has only been more than half a year ago.

It is true that a strong army cannot be trained by training alone, but for a new army that combines swords, shields, spears, muskets, and artillery, they will not be able to go to the battlefield at all without extremely strict and brutal training day after day.

Even in China 300 years later, even when the system and equipment are all complete, it is impossible for an army to truly become an army in one or two years, from recruiting soldiers, to basic training, to being assigned to take shape, to training in different industries, to combined training, and finally to being pulled into the battlefield.

More importantly, don't think that after the establishment of the first town of the Guards, even if the formation and training are successful.

If it were so easy, the Chongzhen Emperor in history would not be without available soldiers.

In fact, the recruits who have undergone preliminary physical training and passed the physical fitness assessment will be pulled out according to the planned establishment to form a team, and it is only the first stage of the formation and training of the first town of the Guards Army.

It was easy to pull up the men who had undergone initial training, but it was not so easy to equip them with new muskets, guns, armor and ammunition.

And this is why Emperor Chongzhen allowed the Portuguese, that is, two foreigners, Antonio de Capo and Dias, to open the "Dias Gunpowder Factory" in Bali Bridge, Tongzhou.

Because the production capacity and production efficiency of the Armament Institute cannot meet the huge demand of the Ming army for new firearms and ammunition.

Dongjiang Town, Liaodong Town, Yingzhou Town, and Rehe Town Guard, as well as the civil officials and military generals on the front line of Shanxi's suppression of bandits and the Yunnan-Guizhou counterinsurgency front, have written to the emperor every once in a while asking the emperor to allocate more new muskets, artillery, and gunpowder projectiles.

Emperor Chongzhen could not refuse all these requests from all over the country, so he could only take out a part of the pitiful production capacity and output of the Armament Institute and transport them to various places to meet some of their needs.

And until now, the production capacity of Chongzhen's front-loading flintlock smoothbore guns in the two gun factories in Tongzhou and Baiyecheng has only exceeded 900 pieces per month.

As for the two types of artillery produced by Chongzhen at the end of the first year, the monthly output is only about 60 guns, among which the Hongyi cannon of the fortress city defense type, that is, the "Shenwei Invincible General Cannon" named by Emperor Chongzhen himself, can transport the supplies that leave the factory every month, and the average monthly is only 20 guns.

As for the improved version of the medium-sized Franc machine gun, which is a little smaller than the Shenwei Invincible General Cannon, that is, the "Chongzhen Type 1 Rear Loading Smoothbore Mother Cannon" named by Emperor Chongzhen, since March this year, the average monthly output has only exceeded 40 pieces.

Because there are so many skilled craftsmen, and there is only so much silver in the emperor's pocket, if you want to train a group of skilled craftsmen, you will have to waste a lot of financial resources and resources.

The contradiction in this cannot be solved in a while, nor can it be solved by an official document from the Military Aircraft Department or a will of Emperor Chongzhen!