The two blankets are not big, and they are just right to cover the knees.

Li Tai put the blanket away, "Let's go and hand it over to the queen mother." ”

With this bear blanket in his hand, it shows that wool can indeed be made into fabrics, which makes Li Tai re-realize the value of wool and have more confidence in the development of Turkic steppe pastures.

The Turks did not realize how much the value of wool could be raised.

Under such conditions of backward knowledge and technology, Lishan can take the lead and gain huge benefits in it.

Watching the little fat man leave with a blanket, Zhang Yang took a sip of tea, "This is the power of knowledge." ”

Li Yue poured tea again, "Knowledge is wealth." ”

With more expectations, the daughter-in-law is in a good mood these days, Zhang Yang emphasized: "Knowledge can change production, and production can create wealth." ”

"But can our current production in Lishan go to the next level?"

Hearing this question, Zhang Yang shook his head helplessly, "Improving the manufacturing level is a very difficult road, and many people don't want to take this road. ”

Li Yue chuckled, "Husband can crack some firewood, there is not enough firewood at home, and he just lost his temper." ”

Looking up at the horizon, the morning sun shone on his face.

"Those guys all day long know that they are depriving people of creativity for their own benefit, and I scoff at that, and I prefer that our Lishan is a creative place rather than let the scholars live like the ancestors who are still alive in the world."

This is a very old and difficult problem, Li Yue knows very well that even if his father wants to break this shackle, he has encountered many difficulties, not to mention his husband, and now his husband only has a piece of Lishan.

"It's okay, my husband is already working hard."

Li Yue smiled softly

In Chang'an City, Li Tai handed over two blankets to his mother, and Empress Changsun liked this blanket very much, such a smooth blanket is very rare.

"This is made by my brother-in-law and the royal sister, and the queen mother likes it."

Hearing this, Empress Eldest Sun looked at Li Tai, "Qingque, you also have to eat in moderation, why do you look fat again recently." ”

Li Tai smiled awkwardly, "Erchen will pay attention." ”

"Your father often talks about your compilation of the Chronicles, and you go to the Manna Hall to tell you how things are going."

"Got it."

Empress Changsun still nodded, "You are a good boy, you usually just have fun, don't waste your talents, I still remember that Zhang Yang once said in the East Palace, and he is good at diligence and frolic." ”

"The queen mother advises, you must remember."

Before leaving the Lizheng Palace, Li Tai specially went to look at his younger brothers and sisters, there was a war horse outside the hall, and when he saw Li Zhi looking at this war horse in a daze, he asked: "Childish slave, what are you doing here?" ”

Li Zhi sat at the door and looked up at the war horse in front of him, "Brother Huang, how do you say you can weigh a war horse." ”

Li Tai was surprised: "What do you do when weighing war horses?" ”

"This is my brother-in-law's topic, I wanted to say that the war horse should be weighed in eight pieces, but my brother-in-law said that he couldn't kill the horse."

Li Tai looked at this docile war horse, to be precise, this is not a war horse should swim in the spring horse, this kind of running is not fast and the physical strength is not good, and the appearance of the horse's hooves has also been trained.

After thinking for a while, Li Tai frowned, "How could such a tricky question come up?" ”

"Brother Huang, can you crack it?"

Li Tai walked back and forth, "Your brother-in-law's house has something called a seesaw, put the stone and the war horse on both sides of the seesaw, and after keeping the balance, the stone at the other end is the weight of the horse. ”

Li Zhi thought worriedly: "I have already tried, because the force is different, and the weight obtained by repeated weighing is different every time." ”

This made Li Tai scratch his head in annoyance.

Li Zhi blinked cutely, "The previous method of counting beans was also told by the imperial brother, and the people in the palace said that the imperial brother was very talented and quick, and he would definitely be able to solve it, right?" ”

Noticing his younger brother's adoring eyes, Li Tai nodded awkwardly, "Brother Rong Huang go back and think about it." ”

Saying it on his lips, he was already muttering in his heart, what kind of tricky topic this is, which is too much of a test of wisdom.

"Brother Huang still has to go to see his father, so it's inconvenient to stay for a long time."

Li Zhi stood up and saluted, "Brother Huang walks slowly." ”

Leaving the Lizheng Hall quickly, Li Tai didn't feel right no matter how he thought about it, it was still the way he counted beans before, and this kind of problem often couldn't be solved with normal people's thoughts.

According to the previous question, the method must be a very simple method, and it cannot be weighed in the ordinary way.

Walking and thinking all the way, Li Tai realized that he had walked in front of the Manna Palace.

The old eunuch in front of the palace smiled and said, "His Royal Highness King Wei, but you are here to meet Your Majesty?" ”

Li Tai nodded, "Father can be in the palace?" ”

"Yes, His Royal Highness King Wei can enter the palace."

After straightening his clothes, Li Tai took a deep breath and walked into the hall, and as soon as he entered the Manna Palace, a cold came to his face.

It's not like Lishan, where every room is south-facing, which makes those houses warm during the day.

Feeling the coldness in the hall, Li Tai looked at his father and bowed, "Father." ”

Li Shimin looked at the book in his hand, "What are you doing?" ”

Li Tai explained the reason, "I helped my brother-in-law send two blankets to my mother, and the queen mother said that my father had asked about the Kuo Di Zhi, so I came to report it." ”

Seeing that his father's eyes were still on the scroll, Li Tai said curiously: "I don't know what kind of classics my father is consulting, if you have any doubts, your sons may be able to solve them." ”

"No need." Li Shimin raised his gaze, "There is someone who said that I should read more, and also said that I am short-sighted and uneducated. ”

Li Tai gasped, "Who dares to speak to my father like this." ”

Li Shimin said again: "He also said that if you don't understand anything, it's okay, if this spreads, I will be laughed at." ”

Hurriedly saluted, Li Tai said again: "Whoever dares to laugh at his father, the son will go and destroy him." ”

Li Shimin grinned, "Okay, he deserves to be my good son." ”

"I don't know who?"

"Your brother-in-law, my good son-in-law Zhang Yang."

When the words fell, Li Tai hesitated again.

Seeing that Qingque was stunned for a long time and didn't speak, Li Shimin drank tea and said, "What? I didn't say I was going to kill him just now, why didn't I squeak now? ”

Li Tai bowed his head and bowed, "Father, my son thinks that my brother-in-law has a point." ”

A kind of loneliness rose spontaneously in Li Shimin's heart, and he drank tea, "Even you think that I have no knowledge and no knowledge?" ”

After the words passed through his mind, Li Tai frowned and thought for a moment before saying: "Erchen thinks that people have their own strengths, if you want to say that your father is not as good as your brother-in-law, but if you want to say that Zhang Yang is not as good as his father, his father is the Khan of the sky, and he naturally needs far-sighted courtiers, if his courtiers do not have such insight and insight, what is the use of His Majesty wanting this kind of courtier?" ”

The words are to the point, impartiality and neither side is offended.

Li Tai is even more able to speak, if he asks Li Chengqian like this, he is afraid that he will not be able to squeeze out half a sentence for a long time.

To deal with these things, Qingque is more clever and can speak.

Li Shimin let out a long sigh, "I heard that in addition to asking Cen Wenwen to compile the geography, they also need to compile geography?" ”

"Father, since Zhang Dasu traveled to the Western Regions and went to Tibet, everything he saw and heard was precious, and the records of the past classics were also recorded according to rumors or previous classics, these classics were old and lacked research, and the sons thought that they should be supplemented and arranged again."

Li Shimin nodded, "Is geography the same as the geography?" ”

Li Tai shook his head, "Father, the difference is like a cook cooking, a cook knows how to cook livestock to make it tastier, and the same is true of the difference between geography and geography, which records the landforms of mountains and rivers, while geography is more about the changes and causes of terroir and mineral deposits, as well as the water flow of the north and south mountain ranges. ”

"Geography pays more attention to the causal relationship formed by the topography, which is the difference, including the sand table that Yuan Daochang is doing, and other results can also complement geography."

Li Shimin bowed his head and said: "Can you know the three major salt lakes in Tibet?" ”

Li Tai nodded, "Since Zhang Dasu came back from Tubo, he has not only seen the landform of Tubo, but also talked with the Tubo people to understand the customs of Tubo. ”

"You're going to write all this in geography?"

"Erchen has such a plan."

It's a good thing that his son has a future, Li Shimin also hopes that Qingque can achieve something, as an emperor, there are some awkwardness in his heart, whether it is the queen, these sons and daughters, these children seem to be thinking about Zhang Yang's good.

On the contrary, it is my painstaking efforts, but they do not realize it.

Eating food, toys, and some strange topics, Li Shimin found that he didn't understand the thoughts of these children more and more.

They just went to Lishan for a month, and Zhang Yang taught them something.

Seeing that his father stopped talking, Li Tai said: "Erchen also found in the records of the Foreign Affairs Yuan that in addition to being barren, the four towns of Anxi also have many merits, and some rich places in the Western Regions are rich in gold and copper mines, and Gaochang has fragrant pear fruit wine and jujubes, which is related to the geography and climate of the Western Regions, and it is also a place where Erchen is specializing. ”

These words made Li Shimin feel very surprised, as if there were salt lakes in Tibet, and there were gold and copper mines in the Western Regions.

Geography is like a huge treasure.

Li Shimin became more and more curious in his heart, "You asked Cen Wenwen to bring the outline compiled in recent days, I want to take a look." ”

"Erchen, I'll arrange it."

Li Tai left quickly, and an hour later asked a few scholars from the Literature Museum to take the scrolls and called Cen Wenwen to meet his father together.

A huge map hung up, and Li Shimin frowned and looked at it, "What is the difference between this map and our ordinary map?" ”

Cen Wenwen stepped forward in a red-robed official uniform and explained: "Your Majesty, the location of this map is more detailed and the boundaries of each territory are clearer, and there is also the guidance of His Royal Highness the King of Wei. ”

Li Tai stood aside and didn't speak, because he had seen the map drawn by Zhang Yang, and that map was now in the imperial sister's account room, and he had also heard Yu Yi in the village talk about it.

And ordinary people can't get into this account room at all.

When listening to her story, Li Tai remembered some and told Cen Wenwen to listen, but he didn't expect that the gap between before and after was quite big.

Li Shimin looked at a mountain range on the map, "Is this Qilian Mountain?" ”

Cen Wenwen nodded and said: "This road between the mountains is the Hexi Corridor, His Royal Highness the King of Wei said before that as long as a pass is built at the end of the Hexi Corridor, that is, in the area of Jiayu Mountain, it can be used to garrison troops and fields, and the land of the four counties of Hexi can be kept behind, and the horse farm built by Huo Qubing in the Han Dynasty can also be restored." ”

Li Shimin looked back at Li Tai.

Li Tai explained: "Father, this is all said by my brother-in-law. ”

"Jiayushan?" Li Shimin looked at the end of the west of the Hexi Corridor, "Building a pass in this place can really keep the land of the four counties of Hexi?" ”

Cen Wenwen then preached: "There is a record in the Hanshu that Huo Qubing said at that time that Jiayu Mountain is the first pass in the west of the river, and the topography of Jiayu Mountain is natural, with both offense and defense, if you can build a pass, it will indeed have the effect of once and for all." ”

Li Shimin asked again: "Then why has no one mentioned it?" ”

Looking at the map, Cen Wenwen still sighed, "The outline of the city seen in this pass of Jiayu Mountain is huge, more than ten miles from north to south, but there is a river valley that can be used as a natural barrier, but if you want to build an area of at least ten hectares and a depth of more than three hundred zhang, its fortifications are huge. ”

Li Shimin took a deep breath, "That is to say, it is not that all dynasties have not had this idea, but it is just that the fortifications are too large?" ”

"There is a record in the classics that this place is the throat of Hexi, and there are cities built in this place, but they are not so huge, and the minister also asked General Wei Chigong, saying that it is a city outline for ten miles, and if you want to build fortifications, it will be a Xiongguan to determine the west of the river."

Staring at the narrow Hexi Corridor, which has always been a battleground for soldiers, whoever can take the Hexi Corridor can contain the Turks in the near and conquer the Western Regions.

Li Shimin said in a deep voice: "How much money and manpower are needed to build this place? ”

Seeing Cen Wenwen looking at himself, Li Tai stepped forward and said: "This idea is also from my brother-in-law, and my son-in-law is not clear, now that Gaochang and Tubo have been decided, it is a critical time to build the land of Hexi." ”

Li Shimin's heart is hot, and the construction of Hexi is of course a huge achievement, and such an important throat has always been a battleground for soldiers.

In Cen Wenwen's words, this will be a Xiongguan, a huge pass.

"What is Zhang Yang doing these days?"

Li Tai replied: "My brother-in-law is still the same, either at home with the imperial sister, or building a new home in Lishan. ”

In the palace, Li Shimin had an idea about Jiayuguan, if the pass could be built, it would be a step closer to the great cause of social engineering for him.

However, in my heart, I want to build a Xiongguan in the Hexi Corridor, and it is the kind that rises from the ground, and it requires countless financial and manpower.

Zhang Yang sold Gaochang to Li Shimin for 30 million yuan.

After several years of recuperation, coupled with the first battle of Tibet, Li Shimin was surprised to find that his heavenly khan was too short of money.

The construction of social society and the construction of a thousand years of achievements is simply a bottomless pit.

Not to mention that I want to build myself a pool of liquid to take a break and look at the scenery.

There are still several palaces in the palace that have not been repaired, and money is needed everywhere at the moment, and every time the money arrives, it has to be spent.

If it weren't for the fact that Qingque had been helping the palace, the palace would not have been able to eat meat.