Li Shimin's will: Li Zhi, the throne belongs to your brother

"pass."

"My son, I have seen my father!"

"Chenqie, I have seen the Holy Majesty."

"Exemption."

Without looking back, Li Shimin wrote a few words on the paper.

"Emperor, are you and your husband here for something important?"

"My son, I have something to hand over to my father."

Li Tai took out a few pieces of paper and handed them to the eunuch beside him.

"Oh? What is it?" Li Shimin frowned and looked at it.

He recognized the first one at a glance, it was the structure diagram of Qu Yuanli.

The second one is something like a wheel, but I can't understand it.

The third one is the recipe for cement.

The fourth one is a well? ?

Li Shimin turned around and felt a little confused, what are these things?

Chapter 18 A century-old dynasty, a thousand-year family

After all, there is only a drawing and no real object, so it is difficult to imagine the specific effect.

Li Shimin turned around and gave Yan Wan a look to signal Yan Wan to leave.

Yan Wan understood immediately, and glanced at Li Tai with reproach.

It seems to say that if you look at me, you will know that the father will not let me stay.

Ann, Li Tai gave a comforting look.

Yan Wan didn't respond, but directly resigned: "My daughter-in-law resigns!"

After finishing speaking, she directly exited the imperial study room.

"Cough cough." Li Shimin coughed and asked Li Tai while holding a cart.

"What is this thing that looks like a wheel?"

Li Tai stood up and explained.

"Father, please look, this cart looks like a wheel, but there are actually many bamboo tubes hanging around the wheel.

Put it into the water, the water will rotate, and the water in the bamboo tube will fall from the other side.

If you use something to catch it here, you can raise the water level when the water level of the river drops, and you don't need manpower to irrigate. "

Li Shimin imagined the scene of putting the wheel into the water in his mind, his eyes lit up more and more, and he shouted.

"Wonderful!!"

"Using water power instead of manpower to irrigate fertile fields for a long time is really a miracle!"

Li Shimin looked excited, slapped his thigh, said to Li Tai, and then gave him a special look.

It seems to say that you really can't choose a name.

"Oh, how can it be called a bobbin cart, it should be called a sky cart!!"

Li Tai: "..."

This is really named a ghost, but it is indeed tall.

"This thing should let the Ministry of Industry build one immediately, and put it in the river for a try."

After all, Li Shimin couldn't wait to see how the cart worked.

"Come here, describe this thing and send it to the Ministry of Industry for supervision!"

"Yes, Your Majesty!" A eunuch took over and went to handle the matter.

"Then, what about the upside-down well?" Li Shimin turned around and found the blueprint of the blast furnace and asked.

The black lines on Li Tai's face, this is not a well, but a blast furnace.

The blast furnace has a very high status in the industrial field. One is that it can smelt iron, but the slag can be used to make cement.

Whether it is iron or cement, it is extremely important for a country.

Li Tai could only explain as simply as possible.

"Father, this is not a well, but a blast furnace!

Iron ore, coke, and limestone are put in from above, and the iron can be melted into molten iron through the furnace.When it comes out, it is good iron, and the slag can also be used to make cement. "

"Forehead?"

Li Shimin was completely dumbfounded now.

He only knows what iron ore is, and neither coke nor limestone is what it is.

And why can he be turned into molten iron by passing through this furnace? ?

Because of the size of the army, iron was consumed a lot but the annual production was very little.

At the same time, Tang Dao has reached the peak level of cold weapons.

Among them, the Mo knife is only available to generals because of its complicated craftsmanship and extremely high cost.

Although the Modao was lost, this unit has been preserved, and it specializes in dealing with cavalry.

Li Shimin rubbed his temples, completely unable to keep up with Li Tai's train of thought, but out of trust, he still asked tentatively.

"How much iron can this thing smelt?"

Li Tai smiled and finally asked the key point.

"Father, this thing is more than five meters high, and it can refine a thousand catties of iron at one time."

"One...a thousand catties???" Li Shimin stood up in surprise.

He doesn't know how high five meters is, but he does know a thousand catties of iron.

Now smelting is to use iron ore and charcoal to burn together to make sponge iron, and then continue to beat it into iron ingots.

Finally, pig iron and wrought iron are mixed together to make good steel, just like fried beans.

A lot of labor, time, and materials are consumed, and the efficiency is extremely low.

And this is a thousand catties at once! !Could this not surprise Li Shimin?

This is iron! !

How many weapons can be forged with so much iron!

There is no comparison between a blast furnace and manual labor. Even if the blast furnace is small, its efficiency is at least a thousand times that of manual labor.

"His Majesty!?"

At this moment, the Imperial Forest Army rushed in when they heard Li Shimin's exclamation.

"Nothing, don't come in without my order!"

Li Shimin didn't even turn his head, he just stared at Li Tai's face, trying to see a trace of deceit and panic from it.

But he failed, and all he saw was fright, timidity and bewilderment.

Li Tai didn't expect that Li Shimin would be shocked by the blast furnace.

"Huanger, can this thing really refine so much iron?"

"Return to father, seriously!!" Li Tai replied firmly.

It is absolutely not a problem to refine half a ton of iron at one time in a small soil blast furnace with a height of more than five meters.

"Okay, this kind of blast furnace must be built. My horseshoe and Mo knife are just around the corner!"

Li Shimin's face was full of excitement, and his eyes became fiery looking at this piece of paper.

"Let the emperor supervise the construction of this blast furnace. At that time, I will ask the Ministry of Industry to assist me, and I will do my best to complete this blast furnace."

"Yes, Royal Father!" Li Tai quickly agreed.

"Then where is the last piece of paper?" Li Shimin couldn't wait to know the last piece of paper.

After all, the first two are amazing.

"Father, this is the cement formula. In the past, the bricks of the city walls were blended with plaster.

Wind and rain, it is easy to dry and fall off after a long time.

But this cement is different. Within half a month of using the cement, it will be as solid as a rock and unbreakable, and even a building can be built in a day.

It can even tower into the clouds, as if standing on the top of a mountain, overlooking the sea of ​​clouds. "

"It's really so miraculous??" Li Shimin frowned with disbelief.

Although the emperor would climb up the Chongyang Festival every year, he had also seen the scene of the sea of ​​clouds and the radiance of the sky.

But if the arm is built so high, won't it collapse?

It is great to know that the buildings of the Tang Dynasty can be built with three floors. Only the pagodas and ancient temples of the temples can be built higher because of their structure.

Most buildings are one or two storeys.

If the building is built above the sea of ​​clouds, how many floors should it be!

Li Shimin felt that his imagination was extremely lacking, and it was hard to imagine how tall the building was, so he frowned and asked:

"I don't know, the emperor may let me see and see?"

This...

It's not impossible, isn't the quicklime crushed and fired into slaked lime.

Li Tai thought about it, and it was possible, but he didn't know where to find the lime, and this was the biggest difficulty.

"Okay, as long as you find limestone."

"Well, is this limestone hard to find?" Li Shimin asked quickly when he saw Li Tai frowning.

"It's not difficult. This kind of stone does not grow vegetation. It is a very common stone mountain."

Limestone mines are widely distributed in China, and open-pit mines usually have little vegetation coverage and only sparse weeds, which are distinctive.

"That's it!" Li Shimin thought for a while, this kind of mountain is so common that it is difficult to remember it for a while.

It seems that Newton is very familiar, but few know the full name.

"I know!" Li Shimin clapped his hands, and when he mentioned stones, he must go to Yuan Tiangang!

"This stone, maybe there will be many at the Dao Gate."

"Well, that's true."

Li Tai thought about it, and felt that it made sense. After all, Taoism refines elixir every day, and such things should be very common.

"Come on, I'll take you over there to see if there is any limestone you mentioned."

Li Shimin suddenly became interested, anyway, other things are not in a hurry for a while.

"Yes, Father."

Li Tai nodded, went out and saw Yan Wan who was waiting, and asked with his eyes.

Li Shimin's expression was calm and he didn't respond, obviously he didn't want to take Yan Wan with him.

Li Tai had no choice but to turn around and talk to Yan Wan.

"Wan'er, you go back first, the king and father have some things to do."

"Chen and concubine retire."

Yan Wan didn't express anything, she just nodded and retreated, there was no blame in her eyes, only gentleness.

Li Tai watched Yan Wan leave, and suddenly heard Li Shimin's words.

"If you want to achieve great things, remember not to be obsessed with the love of your children, let alone be heroic.