Although Li Ke couldn't understand Li Shimin's deep meaning, it did not prevent Li Ke from writing a letter to Li Chengqian as it was.

Li Chengqian, who was far away in the camp of Kongduigou, had no idea that Li Shimin had regarded him as an important force in the Tang Dynasty and wanted to unite with him against the ministers who opposed his crusade.

Li Chengqian had just unified the hearts of the people inside at this time, and Xue Yantuo, who was trapped in the ice city, died in the open-air ice city, and stayed up without eating or drinking for two days and two nights, and was all frozen to death.

Li Chengqian ordered people to sort out the corpse of Xue Yantuo's descendant, and prepared to let the leaders of all the tribes who came to celebrate the victory of the Tang Dynasty come here to visit.

At the same time, he also received good news that he sent people to look for mines found gold, silver, copper, and iron ore, etc., which played a very important role in the subsequent reform of Li Chengqian's Tang Dynasty.

Li Chengqian knew that this area was rich in mineral deposits, but he didn't expect them to find so all, because now the Tang Dynasty's rule here is still very weak, Li Chengqian is only ready to mine gold, silver, and copper, as for iron ore, he ordered to block the news, and wait for the Tang Dynasty's rule here to be the same as that of the mainland.

While Li Chengqian was making various management and production plans, he urgently sent a letter back to Chang'an, asking to mobilize craftsmen from Chang'an to smelt. It is also necessary to transfer Liu Renliang, and the governance here can only be handed over to someone like Liu Renliang who can be civil and military.

But at this time, he received a letter from Li Ke, because the letter wrote in detail what Li Shimin was doing, and Li Chengqian read the letter and understood the thoughts of Li Shimin and the ministers, and he couldn't laugh or cry.

Although he broke Xue Yantuo's tent and arrested Xue Yantuo's nobles here, the Mobei Twenty Coalition Army was fine. If these tribal vendors are allowed to surrender to Datang, and then return to Mobei with all their soldiers, then what can Datang gain in this battle

In the face of the powerful Mobei Hetao area, how to govern it

These people will come to rob when they become strong in the future, and the Hetao area will still be a battlefield at that time, which is equivalent to the depth of Datang's strategy, and the root cup can develop the economy.

Don't say, 'Do business with the tribes, let him have something to eat, and they will rob them.'" This kind of stupid statement, the US economy is now the largest in the world, isn't it still relying on grabbing?

Moreover, history has proven many times that this land can only support so many people, and once the limit is exceeded, their own people will also starve and rebel, and before the contradiction between human development and limited natural resources is completely resolved, it can only make others less.

Therefore, Li Chengqian's purpose this time is very simple, which is to cripple the entire Mobei grassland, so that they can honestly accept the policies of the Tang Dynasty.

Destroying Mobei is not only to slaughter Xue Yantuo's 30,000 people, but also to keep these 200,000 people.

In Li Chengqian's opinion, breaking through the tent of Xue Yantuo Khan can only be regarded as half of the victory, but Li Shimin actually thinks that the Tang Dynasty has won and can go east to conquer Goguryeo.

In this letter, Li Ke also told Li Chengqian the opinions of the ministers.

These ministers are even worse than Li Shimin, and one by one they even think that they can move back to the dynasty after the New Year.

Li Chengqian knew that these ministers would neither support Li Shimin's eastward expedition to Xue Yantuo, nor would they support Li Chengqian's governance of the Hetao region.

In the face of such a situation, Li Chengqian could only write his thoughts into a song and send them to the line, so that Li Shimin and the ministers would know that he Li Chengqian planned to govern the Hetao area, and not play his own calculations behind his back, ignoring him, the crown prince who was fighting abroad.

Li Chengqian's recital mainly contained four points: first, to build the Great Wall on the site of the original Qin Great Wall, second, to build a straight road from Guanzhong to the Hetao area, third, to abolish the Hetao area's fetters and reorganize them into counties, and fourth, all tribes in the Hetao area were to change their uniforms, wear Hanfu, comb Hanfu, and learn Chinese.

This is not only an expression of Li Chengqian's attitude but also a test of the waters, so the content is written very simply, and there is no mention of where the manpower and material resources needed to repair the city and roads come from.

At the same time, Li Chengqian wrote a private letter to Li Shimin as his son, the content of which was mainly an answer to his desire to conquer Goguryeo.

The unfilial man took the first hundred bows and started before his father's drive:

I heard that my father wanted to conquer Goguryeo next year, and my sons thought about it repeatedly, and there were a few confused words to show that my father was in detail.

The Goguryeo people are easy to destroy and difficult to destroy, and the reason why the Goguryeo people also live in the cities is that as long as the army breaks through their cities, Goguryeo will perish, and they will not run away on horseback as soon as the steppe tribes arrive.

It is difficult to attack because he is full of cities inside, and he needs to attack each city one by one, as long as a few cities cannot break Goguryeo, he can survive and attack each other with the Tang Dynasty.

The second is that now is not a good time to conquer Goguryeo, although Goguryeo has experienced the murder of the emperor by Quan (Yuan avoided Li Yuan) Gai Suwen, but there was no large-scale civil strife, the power was in the hands of Quan Gai Suwen, and the people in the country lived a stable life. At this time, there was no minister of Goguryeo as the internal response of the Tang Dynasty, and the Tang Dynasty's attack on Goguryeo could only make Goguryeo fight back against the Tang Dynasty.

The art of war is cloudy, "knowing oneself and knowing the other, and being invincible in a hundred battles", the father and emperor are unknown, and the details of Goguryeo can be lightly dispatched

If the Tang Dynasty wanted to conquer Goguryeo, it was necessary to implement the plan in the "Ten-Year Plan", first clean up and stabilize the central and northwestern departments, and then spend several years to accumulate money and food, send spies to unite with the Han people who were not in Goguryeo during the former Sui Dynasty, first mess up Goguryeo and make the people miserable, and then wave the army to destroy Ke and succeed in a war.

The father and emperor in the Spring and Autumn Period were high, and the father and emperor of Goguryeo should only plan and not drive the expedition in person, and when everything was settled, his own sons and ministers led a large army to conquer Goguryeo, in order to complete the father's wish.

Li Chengqian thought that this letter had been tactful, so he sent someone to send the letter.

Li Chengqian's recital was already 18 years old when Li Shimin's line was there, and Li Shimin was in the line to celebrate the New Year, although it was not grand in Chang'an Taiji Palace, but because Xue Yantuo had been wiped out, the officials who were there still got a few days of vacation, and only a few ministers were left on duty.

Li Chengqian is the crown prince or the supreme commander of Xue Yantuo in the front, so as soon as Li Chengqian's recital arrived, he was sent to Yang Hongli's desk on the rotating duty of the main middle school.

Yang Hongli was also a member of the Sui Dynasty clan, and he was still a scholar before the expedition, and he was only promoted by Li Shimin to be a soldier to accompany him to handle the aircraft when he went out.

Yang Hongli was taken aback by Li Chengqian's boldness as soon as he read Li Chengqian's recital, and on the surface, the four articles proposed by Li Chengqian were completely copied by the Qin Dynasty's land policy in the Hetao area.

The Qin Dynasty had already done it here to build the Great Wall, build straight roads, and travel counties, and it seemed that there was no benefit except for laboring the people and losing money.

There is also the order of the Qiang, Turkic, Zhaowu and other tribes in the Hetao region to change their uniforms to Yiguan and perform Han rituals, which will also cause resistance from the local tribes, and may even affect the negotiations with the Hui and other departments.

Therefore, Yang Hongli thought that no matter how the imperial court looked at this matter, it was absolutely right and could not be leaked out now, but he did not dare to make decisions about such a matter, so he had to get up and go to Li Shimin and ask him to come forward to suppress Li Chengqian.

Since the last time Li Shiqian expressed his intention to go east to Goguryeo and was unanimously opposed by the ministers, Li Shimin has had little contact with the ministers in the past few days, and he has to wait for Li Chengqian to write a letter to support the Eastern Crusade before dealing with these ministers.

In the past few days, Li Shimin has been waiting for Li Chengqian's news, and then Li Shimin waited for Li Chengqian's private letter, which was written by Li Chengqian himself, and the thin gold body made people look pleasing to the eye, but the content of the letter made Li Shimin angry.

This is a letter written by his son to Lao Tzu, it is clear that Lao Tzu taught his son, and he actually opened his mouth to have a relationship with Lao Tzu's art of war......

And the most unacceptable thing for Li Shimin was that Li Chengqian said that he was too old to conquer Goguryeo in person, and Goguryeo would be left to him to fight.

Li Shimin looked at Li Chengqian's letter, his eyes were wide open, he was panting, and the blue tendons on his forehead were exposed, and he was already extremely angry.

At this time, the chamberlain reported to Yang Hongli and asked to see him.

"Nope!"

Li Shimin roared loudly.

Li Shimin is also dumb at this time, and he can't say that he has suffered from eating yellow lotus, although the letter written by Li Chengqian to him made him angry, but he was even more embarrassed to let the minister know.

First, it was not a glorious thing for him to be taught a lesson by his son, and even if he told the ministers about it, these ministers would only support Li Chengqian.

The chamberlain went out, and hurriedly came back and said stubbornly: "Your Majesty, Lord Yang said that this matter is urgent, and it has something to do with His Royal Highness the Prince......

"What"

When the chamberlain heard this voice, he was so frightened that he trembled and did not dare to squeak.