Xiande Hall is another one-day court meeting.

After Li Shimin sat down, his own close ministers played, saying that it was the Western Turkic Mohe Marquis Quli and the Yibi Boluo Yehu Khan who sent envoys to the court.

It turned out that the Western Turkic Yehu Khan was killed by his uncle, and he established himself as the Mohe Marquis Quli Qipi Khan.

In order to avoid the disaster of killing, the son of the Tongye Hu Khan, Zhilitler, fled to Kangju, and the mud man who lost his crossbow sent people to welcome him back, and he was established as the Yehu Khan of Yibi Boluo, and since then he and Mo Helu have attacked each other, and the beacon fire has continued.

Due to the division of the Western Turks, the countries of the Western Regions and the Tiele tribes that had previously submitted to them rebelled one after another.

The two khans couldn't hold each other for a while, and they felt alone, so they showed goodwill to Datang at the same time and asked for peace.

Li Shimin consulted the opinions of the courtiers, summoned two envoys into the palace at the same time, and reprimanded: "Your country is in turmoil, the monarch and the ministers are undecided, and the war is endless, how can you talk about marriage?" ”

So he rejected their marriage proposals, and ordered them to guard their borders and stop their conquests against each other.

After the two envoys retreated, Li Shimin said to the ministers: "This battle of Shuofang not only wiped out the Liang Shidu, but also defeated the Eastern Turkic reinforcements, and ruthlessly extinguished Jieli's arrogance.

Now the Hetao area has been controlled by our Tang Dynasty, and only the land of Wuyuan has not been recovered.

What do you think about the disposal of Shuofang and Yulin? ”

Li Jing came out and said: "Although the land of Shuofang and Yulin has been recovered, the Turkic Yu Shooting Station is still stationed in the land of Wuyuan.

The ministers thought that they should immediately repair the walled city, adjust the military government, and pay close attention to the training of soldiers, so as to prevent Jieli from entering the army. ”

Fang Xuanling also played: "What Li Shangshu said is extremely true, Jieli lost the chess piece of Liang Shidu, how could he be willing to give up? In addition, it has suffered natural disasters and suffered heavy losses, so it will definitely wait for an opportunity to plunder south.

I, the Tang Dynasty, can hold the key points, and build the land of Shuofang and Yulin into a barrier in Guanzhong, and keep the enemy out of Guanzhong. ”

"Hmmm......"

Li Shimin nodded frequently when he heard this.

The so-called emaciated camel is bigger than a horse.

Although the Eastern Turks are declining, their strength should not be underestimated.

And although Datang has a depth of several hundred miles, it feels like Jieli can still hit Guanzhong at any time.

At this time, Du Ruhui said: "Why not follow the policy of Gongsun Wuda and develop agriculture and horse politics in Shuofang and Yulin?"

With the zigzag plough he provided, grain production in the Hetao area could be restored in the shortest possible time.

And the horseshoe and Takahashi saddle cooperate with the shepherd's system, and over time, they can also create an invincible jockey for my Datang. ”

Li Shimin listened to it and thought it was true.

said that it was Gongsun Wuda, but in fact, it was Luo Taisui's child's idea.

Moreover, the advantages of the Hetao area, Luo Taisui's kid realized it before he decided to attack Liang Shidu.

"The Hetao area cannot be lost again!"

Li Shimin said in a deep voice: "In the future, it will not only be a barrier in Guanzhong, but also replace Guanzhong and become one of the most important grain-producing areas." ”

After a pause, he said: "And Guanzhong, the implementation of returning farmland to forests." ”

When the ministers heard this, they were immediately puzzled.

Returning farmland to forest?

What does this mean exactly?

At this time, Li Shimin continued: "You may not have heard of the so-called return of farmland to forests.

In fact, it is very simple, that is, the cultivated land with severe soil erosion, as well as the arable land with low and unstable food production, should be stopped as planned and replaced with suitable trees and vegetation to conserve water. ”

This is actually the long-term strategy proposed by Luo Taisui to solve the locust plague.

Li Shimin has always recorded it in the book, and he will not have the opportunity to implement it until the Hetao area is recovered.

"Your Majesty, what do you mean by this?"

The ministers were even more puzzled.

Now that we know the meaning of returning farmland to forest, what is the significance?

At this time, people did not have the concept of protecting trees and maintaining vegetation cover.

And Li Shimin was able to form this consciousness only after Luo Taisui's words.

This is also where he is ahead of his ministers in thought.

"Do you know that the forests in the Guanzhong area are not as good as before because of wanton felling?" Li Shimin got up and said.

The ministers looked at each other and shook their heads.

Does it matter?

"It's better for me to give you a good talk."

Li Shimin said slowly: "As we all know, every household needs firewood to make a fire for cooking.

And where does firewood come from?

Nature is the cutting down of trees. ”

After a pause, he said: "Think about it, how many people does Chang'an have?"

More than a million.

What about Guanzhong? ”

"About three million." Dai Xuan said.

"With a population of more than 3 million, how much firewood does it take to make a fire and cook alone?" Li Shimin's gaze skimmed over the ministers one by one, "Countless!"

But that's not all.

The iron forging in the Guanzhong area, and even the fuel used by the wealthy people, is charcoal, and charcoal is fired from firewood, which requires more trees to be wasted......

Has anyone calculated how long it will be before the trees in Guanzhong will be cut down? ”

In the face of his inquiry, the ministers were silent.

Since ancient times, people have relied on mountains to eat mountains and water to eat water, and never thought of the day when mountains and rivers are exhausted.

Li Shimin smiled bitterly and said, "I haven't calculated either. But I know that if we cut down and don't plant it, the once dense forest will one day disappear in Guanzhong.

What would that look like? ”

The yellow sand is all over the ground, and there is no one to live.

People can't live and eventually choose to leave.

Leaving only a desolate land......

"Someone once told me that the frequent locust plagues in Guanzhong were caused by the wanton felling of trees and over-cultivation of the land, which caused soil erosion.

The arid environment has encouraged locust breeding, which shows that the tree vegetation in Guanzhong has been severely damaged. ”

"Becoming an Immortal"

Li Shimin said with a heavy heart: "Therefore, I intend to develop the Hetao area to reduce the food pressure in Guanzhong.

In addition to replanting trees in the felled areas, Guanzhong also needs the leaders to take the lead and plant trees on some low-yield cultivated fields. ”

Doing so is said to allow the land to be cultivated.

The ministers looked at each other when they heard this.

Planting trees on a cultivated field?

Isn't there less food production?

"You don't have to worry." Li Shimin smiled and said: "After the trees grow, they can be used as various wood, and they can also burn charcoal, which is no worse than growing grain." ”

Moreover, whether it is planting trees or returning farmland to forests, this will be a long-term policy, and it will not be achieved overnight.

This is just a temporary idea put forward by the reconquest of the Hetao area.

How to implement it still needs to be constantly discussed, and finally it can be finalized.

"This matter is up to you, think about it a lot, discuss a long-term plan, the next court meeting, I want to hear your opinions."

After Li Shimin finished speaking, he announced his retirement from the dynasty.