Merchants in Chang'an City have recently noticed that business seems to be improving.

Originally, when the crown prince Li Chengqian was in charge of the country, the atmosphere in the entire Chang'an City was relatively depressing.

Now that Li Shimin is back, everything is back to normal.

In addition, a large number of Goguryeo trophies have flowed to the market one after another, and not only the price is favorable, but the quality is also good, which attracts many people to buy.

Li Kuan also went to various workshops to inspect and learn about the current situation.

Actually, there was no need for him to go at all.

But being at home is so tiring.

After a long drought, my waist can't stand it.

Even if you eat the Liuwei Rehmannia Pill that you made before, the effect is very limited.

So after staying in the house for a few days, Li Kuan immediately made an excuse and came to the workshop city to inspect the construction of the tallest building in Datang.

"Lord Wang, according to this progress, it will be capped in a few days. However, how to go up easily and quickly in such a high building has not been solved. The top floors are ready to build a flagship store for Home Ininn, but when the time comes, guests will have to climb twenty or thirty floors, and it is estimated that few people will be willing to stay here. ”

Dai Quan frowned and looked at the tall building in front of him helplessly.

Digging foundations, pouring reinforced concrete, and building frame structures are not particularly big problems.

Although it is difficult to build, there is a way to solve it.

It's just that this problem of personnel up and down has never been a clue.

"When we designed the drawings before, didn't we reserve rooms for two lifting machines? Haven't you worked out a usable lift in the mechanical workshop yet? ”

Elevator, Li Kuan is not counting on it.

Although the existence of electricity has been proved through kite experiments, there is still a long way to go before electricity becomes widespread.

But a 100-meter tall building, if there is no elevator available, it is really a big problem.

"We've tried several options. For example, using a cable to pull the hanging basket up is similar to the method used when entering and exiting after the curfew on the city wall. However, it was found that this method has great safety risks, and once you don't pay attention, the hanging basket will fall down directly. If the building is not high, the risk may not be very large. But our 100-meter-high building is different, if you really fall down from above, that person will be gone! ”

Dai Quan, as an eighth-level worker in the Chu Palace, can be said to play the role of chief scientist.

Now even he can't do anything, so you can imagine how long this problem has been bothering everyone.

"Surely you can't cope with the past with a simple cable, hasn't the Bearing Research Institute developed in addition to many kinds of gears? One of the rack and pinion structures is already used in the steering mechanism of Mercedes-Benz four-wheeled carriages? It is a relatively mature application. We can apply the rack and pinion structure to this kind of lift. ”

Li Kuan tried his best to combine the elevator scheme of later generations? Soft the current level of technology and sort out a corresponding plan.

What if you can't do it today? It's okay for everyone to work all night directly in the gear research institute.

Anyway, there is no way to get a good rest when you go home.

"Rack and pinion structure for lifts?"

Dai Quan vaguely felt that he had caught something.

"That's right! Can we use a lift compartment as a tool for customers to get up and down the building? This lift compartment uses multiple steel wires to fall on the special cantilever beam, and then controls the up and down movement of the steel wires through the rack and pinion structure and pulley block structure. Of course? We need to set up some locking mechanisms to avoid the rapid sliding of the wires, and we also need to match the height of each floor with the number of rotations of the gears? Otherwise, there is no way to realize the problem of how many floors customers want to go to. ”

"Lord Wang? Although it is possible to achieve this function with a gear structure, what force does this lift rely on to move up and down? ”

Dai Quan has slowly entered the state and started the tireless studious mode.

"With the help of several sets of pulleys, the control system is finally placed on the basement level by means of a winch. Is there a landscape river introduced next to our mansion from time to time? Can we put a waterwheel in the river? The power of the waterwheel is used to drive the rotation of the gear shaft. When we need to turn the winch? The gear shaft connected to the waterwheel is connected to the gear connected to the winch to realize the up and down movement of the steel wire.

Of course, there is another problem you also have to consider how to solve, that is, how to make the elevator stop accurately on different floors, how to make the gear shaft of the waterwheel and the winch gear continuously meshed and separated according to the needs. This aspect? Can you talk to the craftsmen of the Mercedes-Benz carriage workshop, some of the structures on their carriages? It may be able to give you some reference meaning.

In addition, how can customers control the elevator at high speed on the floor they want to go to? You also have to think about it. My suggestion is to be connected to the cables of each layer by wire, once the guest pulls the cable? Will the bell in the elevator control room ring? Think about it again. ”

Li Kuan wants to break his head? That's how these things came up.

Fortunately, gears and bearings have been studied in many workshops for several years, and some results have been achieved.

Otherwise, you can only use the most primitive and dangerous hanging basket mode.

"Lord Wang, do you think we should publish a reward on the "Datang Daily" to see which workshop can come up with a mature plan based on the ideas we provide?"

Dai Quan listened to Li Kuan say a lot, but felt that according to Li Kuan's current plan, the structure of this set of elevators should be very complicated.

But he didn't have any good improvement plans for a while.

So simply made a bold suggestion.

Anyway, this plan is not the first time he has thrown it out, and the imperial court has already used it.

"You can do this specifically, anyway, this king only looks at the results!"

"Okay, another ......"

Dai Quan had a tangled expression on his face, not knowing whether to continue asking questions.

"If there are any difficulties, let's talk about them all at once, don't delay the construction time, you say it's a problem of this and that."

Li Kuan didn't know Dai Quan for the first day, so he could naturally see at a glance that he still had something to say.

"That's right, as the tallest building in Datang, our building needs the owner and needs to meet people's daily living needs, which requires the use of a large amount of water. Originally, we thought that we would just need to bring the water up, and it would be nothing more than wasting more copper pipes. But in the process of building the building, we tried to bring water into the building, but found that the water could not go up without building many floors. At that time, although we can also use the elevator to carry water, it is still very inconvenient in the end. ”

After Dai Quan finished speaking, an embarrassed expression appeared on his face.

In the eyes of the craftsmen of the Chu Palace, he is an eighth-level worker, and he is the craftsman with the highest technical level in the Chu Palace.

But Dai Quan knows very well that many of his skills are not enough to see in front of his own prince.

Especially some whimsical ideas, I can't think of anything.

"It's very simple, just make a pump. There is no pressure in the water pipe, and there is certainly no way to keep flowing high. But after pressurizing by a water pump, there will be no such problem. As for the structure of the pump, I'll draw a drawing for you later, and you can arrange someone to follow it. However, how to quickly and easily make the impeller in the pump rotate quickly, this is the problem you need to consider. ”

Li Kuan provided a creative idea to solve the problem, and he did not intend to do anything too detailed.

If he really had to do everything himself, what would he do with so many craftsmen.

"Water pumps? Pressurizing water? ”

Dai Quan's eyes lit up when he heard this.

With his technical attainments, as long as Li Kuan dialed it slightly, he would be able to understand what was going on.

"That's right! If you build a pool on the roof of the building and add water to the pool regularly with a pump, you will solve the water problem. As for whether this pump can be used in other places, it depends on your ability. ”

The structure of the pump is not complicated, and with the ability of the subordinate workshops of the Chu Palace, as long as there are drawings, it can be made immediately.

A lot of things, in fact, it's not that the technology doesn't meet the requirements, but that no one thinks of it.

"Ahh

"Bleeding!"

"Call Lang Zhong!"

When Li Kuan was about to leave, he found that there seemed to be an accident on the construction site.

"Lord Wang, don't worry! The Affiliated Medical Center of Guanshishan Academy School of Medicine has a surgeon Lang Zhong who has been stationed at our construction site for a long time. Looking at it like this, I should have accidentally hit something! ”

Dai Quan saw that Li Kuan seemed to be about to walk into the construction site to see what was going on, and quickly explained on the side.

"Huh? Is there a special Langzhong garrison? ”

Li Kuan's first reaction was not how thoughtful they were, and even the medical staff had arranged it properly.

On the contrary, Li Kuan felt that it was because there were all kinds of accidents on the construction site every day, so they had no choice but to hire Lang Zhong to be stationed there.

Didn't you hear people say that Lang Zhong is a surgeon?

"Yes! Because we have thousands of craftsmen working here at the same time every day, because the building is relatively high, once the wind rises, or when someone accidentally gets some sand and gravel while working upstairs, it will inevitably hit people. At the beginning, a few helpers even delayed treatment because of excessive bleeding, so we invited the surgeon to be stationed here, and in case of an accident, we could deal with it immediately. During this time, we have not had any cases of helpers dying due to injuries. ”

Dai Quan didn't feel at all that the dead helpers had anything to pity for.

In his opinion, Nanshan Construction Workers has paid a lot of pensions to these helpers, which is already very merciful.

If there is a different shopkeeper, maybe these helpers will die when they die, and there will be no compensation.

However, Li Kuan obviously does not agree with this view.

"Did most of the injured people get hurt by something falling from the sky?"

"Yes! Everything else is easier to prevent, but things fall in the air, which is simply impossible to prevent, and all kinds of things may fall down! ”

"Then you didn't think about equipping the craftsmen with hard hats?"

A helmet is a must-have item on the construction site in later generations.

If you don't wear a hard hat, you won't even be able to get into the construction site.

Practice has also proved that wearing a helmet can greatly reduce unnecessary casualties.

So Li Kuan's first reaction was to wear them all, why can't they remember to make a hard hat out.

"Hard hats? Lord, do you mean to make a batch of hard hats for craftsmen to wear? ”

"That's right! Wouldn't this greatly reduce such casualties? ”

Li Kuan saw that the injured craftsman just now was bandaging with the help of Lang Zhong, and his face was covered with blood, which gave the other craftsmen around him a very bad feeling.

After all, no one knows if the next brick will hit their head.

"However, whether it is the West Market, the East Market, or the trading center, there is no such helmet. In addition, the only way to meet this requirement is to use a hat made of stainless steel, which is not only heavy, but also requires a lot of money. ”

Between the dead and spending money, Dai Quan obviously chose the dead.

This also represents the attitude of many people in this era.

"The ironmaking workshop under the prince has increased a lot of steel production today, and the casting technology is high enough to cast the helmet relatively thin, and the steel required is still limited, and the weight should be within the acceptable range. Dai Quan, you arrange as soon as possible, and craftsmen who do not wear safety helmets in the future are not allowed to enter the construction site for construction. ”

Li Kuan didn't want the tallest building in Datang to become the one with the most dead people.

When the time comes, it is estimated that there will be infamy in the history books.

Next, Li Kuan simply walked around the construction site and put forward a series of safety rectification suggestions, and then slowly returned to the Chu Wangfu Courtyard.

In the next few days, Li Kuan frequently went in and out of various research institutes, providing everyone with a lot of solutions to solve problems, and then slowly recovered the state before the expedition.

"Wow!"

Li Kuan, who was lying on a bamboo chair basking in the sun, was disturbed by the cry of the little potato.

"Little corn, why are you bullying your brother again?"

Li Kuan looked at the two sisters and brothers helplessly.

Wu Meiniang is obviously such a strong person, but she gave birth to a son, but she looks loyal, honest and simple.

But Little Corn still likes to tease him every time.

"Aye, I didn't bully him. I'm just teaching him how to hold his breath! The last time I went swimming, the little potato was so stupid that he couldn't swim at all. ”

Little Corn had just pinched the little potato's nose with her hand and made him cry raw; Now it's justifiable to find a reason.

I don't know who this guy learned from, Li Kuan feels that he is not so slippery.

"Ayya! Sister pinched my nose! ”

The two-year-old little potato can already speak something that is not too long.

"My sister is joking with you, you don't have to pay attention to her, come and play with Aye."

If someone else bullied Xiao Tudou, Li Kuan might directly tell him, "Whoever beats you, you will fight back", but if Xiao Corn moves his hand, there is no way.

You can't exacerbate the conflict between the two little guys there.

However, it is not okay to leave anything alone.

When the time comes, Wu Meiniang will definitely not be happy when she sees it!

Don't look at the usual good relationship between her and Cheng Jingwen, she has become one step closer recently, but she must be unhappy when she sees her son being bullied.

Even if she knew it was just a joke between children.

"Lord Wang, the county lord, she is now the top of the Future Star Kindergarten, if this continues, she will not be able to marry when she gets married, and when you are free, you still have to take care of her."

Qing'er on the side thought about it, and still reminded Li Kuan.

This kind of thing is something that ordinary people would not dare to say to Li Kuan.

On the contrary, it is Qing'er, a personal maid who has been with Li Kuan for more than ten years, and she will not be taboo when she says it.

"There are so many princes and children of the Guogong family in the Future Star Kindergarten, they are all afraid of small corn?"

"Yes, whether it is the son of His Royal Highness the Prince, or the San Lang of His Royal Highness the King of Wei, or the nephews of other ministers, whoever dares not to listen to Xiaomai in the kindergarten will be beaten by the 'Eight Female Generals of the Tang Dynasty'."

"The Eight Female Generals of the Tang Dynasty?"

This word is the first time Li Kuan has heard it.

He knew that Little Corn was naughty and often mischievous, but he never took it too seriously.

Isn't it normal for four or five-year-old children to be naughty?

But now that I heard Qing'er say this, I realized that it seemed that the situation was a little out of control.

Her own little girl seems to have grown crooked!

Is it possible that I should consider re-opening a trumpet now?

Otherwise, the intimate little padded jacket will become black-hearted cotton!

"Yes, the county lord plus the seven little ladies of Cheng Dalang's family are now an existence that no one dares to mess with in the Future Star Kindergarten. Even in Chang'an City, they are all household names, and few people dare to provoke them! ”

Li Kuan: ......

At the beginning, he was called "the first of the four evils of Chang'an City", but now the little corn is good, and he directly formed a group by himself, not so much as the "Eight Female Generals of the Tang Dynasty", but the "Eight Scourges of the Tang Dynasty".

"Does the princess know?"

"I know some, but no one dares to sue in front of the princess. Although the princess also made a lot of restrictions in order to keep the county lord from going out to make trouble. But the county lord is always able to change his ways to exploit loopholes, and even sneak out of the house altogether. ”

Qing'er didn't care that the little corn was next to her, but she dared to say anything.

"Little corn, come here!"

Listening to Qing'er's words, Li Kuan stared at the little corn with an unkind face.

"Aya, I suddenly heard something, I spent a painting in the study to give it to you, you wait for me for a while."

The little corn is fine, and when he saw Li Kuan's expression, he immediately had a countermeasure.

She didn't wait for Li Kuan to return to agree or disagree, and immediately ran to the study.

There, she directly found a very cartoon picture, and ran back to find Li Kuan after putting it away.

It's useless to run away, and the little corn has long understood this truth.

Instead of running away, it is better to quickly eliminate the anger of your own Aye, that is really safe.

"Huh? Did you really go back and get something? ”

When Li Kuan picked up the little potato and put it beside him, he found that the little corn actually trotted back again.

The little pigtail tied on that head dangled was very cute.

"Aye, I said I was going to send you a painting, of course I'm coming back!"

As if nothing had happened, Xiao Ma took out a picture scroll from behind his back and handed it to Li Kuan.

"Oh? You can actually draw. Then Ayah wants to see what you are drawing. ”

Li Kuan curiously took the painting in Xiao Mao's hand, and then slowly unfolded it.

Directly a young man, with a somewhat Li Kuan silhouette, holding a little girl in one hand and a little boy in the other, next to a big dog.

Just looking at this painting technique, it is naturally not superb.

However, it is clear that this painting should be made by Xiao Corn, and she painted it herself.

And looking at the time above, it was a few months ago.

"Ayah, how's it going? Is it good-looking? ”

"That's a good drawing!"

"I think so, too!"

Li Kuan: ......

"Last time I took Little Potato to kindergarten, no one else dared to bully him. Little Potato is my younger brother, only I can bully him, and if others dare to touch him, I will let the Golden Retriever go up and bite him! ”

"Ahem!" Li Kuan thought of the size of the golden retriever, if he bit Li Chengqian or Li Tai, or Cen Wenwen or anyone's son or nephew, it would be fatal, "Be cautious when letting the golden retriever bite people!" Now it is more than 200 pounds, and the idle soldiers are not its opponents, and it is a bit inappropriate for you to let it bully the children in the kindergarten. ”

"Aya, don't worry, the golden retriever is very smart and knows when to really bite and when to make a show. However, the rest of the kindergarten did not know this, so no one dared to provoke. Even many people have seen the golden retriever so powerful and majestic, and they have begun to raise mastiffs at home. ”

Little Corn apparently didn't realize her mistake at all.

"Lord Wang, this is true. This year, in the West Market, there are more people selling mastiffs, and even some shrewd merchants go directly to Tuyuhun's hometown, where they find a large number of mastiffs and bring them back to Chang'an City for breeding, and then sell them at a high price after giving birth to small mastiffs. A small mastiff with pure coat can be sold for hundreds of dollars, which is beyond my imagination. ”

Qing'er interjected on the side.

For her, it was unbelievable that a dog could cost more than a yard.

No matter what kind of dog it is, it's just a dog after all.

How is it worth hundreds of dollars?

If you really want to calculate it like this, wouldn't the golden retriever of your own county lord be able to sell it for thousands of dollars?

"Where there is demand, there is a market, and mastiffs are estimated to be popular for a while. However, this thing has nothing to do with ordinary people, it is expensive, but it can make people mention their interest in Tubo, which is not necessarily a bad thing. ”

Li Kuan had already obtained the news through the Intelligence Investigation Bureau of the Chu Palace, and knew that Lu Dongzan was a very hard life, and he actually returned to Luo Qi City alive.

Although his leg is as lame as Li Chengqian, his rights have not decreased at all.

Today's Tubo State, under the hard work of Songtsan Gampo and Lu Dongzan, although it did not dare to develop in the direction of the Tang Dynasty, but in the south and west, it annexed several small countries one after another, and its momentum did not decrease but increased.

For this country that will sooner or later become a border trouble for the Tang Dynasty, Li Kuan still maintains a high degree of vigilance.

For a long time in the future, the Tubo Kingdom and the Great Cannibals will be the main enemies of the Tang Dynasty.