Princess, he is rich enough to rival the country

For Gu Yanshu, cement is a little more difficult than glass, alcohol and even steelmaking.

After all, whether it is movable type printing, glass or alcohol, or even steelmaking, raw materials or prototypes of low-profile versions can be found.

Gu Yanshu only needs to tell the craftsman who is good at this way of his ideas, and after a little bit of coaching, he can basically get a flatness that is almost inseparable.

Finally, adjust it again, and the result will naturally be satisfactory.

But cement is different.

Relatively speaking, cement is basically to realize the whole process from scratch to something.

The cement ash in the raw materials alone is enough to stump many people.

Although Gu Yanshu later thought of a way to use volcanic ash as a raw material for cement, it took a lot of time to find the volcanic ash based on the strength of Prince Li's mansion.

Not to mention that during this period, in order to study Chengping, Gu Yanshu also spent a lot of time and experience, conducting experiments with craftsmen.

During the period, I even failed because of the problem of proportion. I don’t know how many times I failed.

Fortunately, the final result is gratifying.

And what is there a word called?

It's better to come early than to come by coincidence.

It took a long time to find the volcanic ash, and the process of researching the finished cement product was indeed a bit difficult, but I have to say that this time is extremely coincidental.

Seeing Qin Lu and the fifth prince looking at the cement block with doubts on their faces, Gu Yanshu smiled slightly.

"This cement is resistant to high temperature and corrosion, and it is hard in texture. It is waterproof and moisture-proof. It can be said to be perfect for building dams."

Having said that, Gu Yanshu paused slightly, and then added another sentence:

"The most important thing is that compared with the traditional construction method, the cement production method is simpler and more time-saving and labor-saving."

At the same time that Gu Yanshu was explaining, Qin Lu had already touched the piece of cement on the table.

It was found that the fact was indeed as what my princess said, the texture of the cement was very hard.

Even according to Qin Lu's hand strength, there is no way to leave any marks on the cement block without using internal force.

Qin Lu slowly exercised the strength in his hands, and found that he needed to use at least [-]% of his internal strength to leave marks on the cement with his bare hands.

Qin Lu is famous all over the world, and his martial arts is so strong that no one can match him.

How many people in this world can have seventy percent of Qin Lu's internal strength?

Later, Qin Lu took out the long sword he carried with him and tried it, and found that even so, it would take three points of internal strength to shake the cement.

Not to mention building dams, such a hard material can be used to build city walls!

But soon, Qin Lu thought of another question:

"Is this cement made of volcanic ash?"

Before the cement was successfully produced, Gu Yanshu could be said to be tight-lipped about it, even if Qin Lu asked about it, he was unwilling to reveal any more information.

But the people who went to look for the volcanic ash back then were people from Prince Li's mansion, and these days, after Gu Yanshu came out of that small courtyard, he would more or less carry some volcanic ash on his body.

That choking and special smell is difficult even if people want to ignore it.

And these peripheral information are enough for Qin Lu to come to such a conclusion.

Qin Lu had also heard about how difficult it was for people in the palace to find volcanic ash.

If the cement is indeed made of volcanic ash as he thought, is the amount of cement really enough to build the dam?

Gu Yanshu understood what Qin Lu meant when he heard it:

"It is true that volcanic ash was used, but don't worry, my lord, the amount of volcanic ash is completely sufficient. And the biggest use of this cement is not to make cement blocks."

Qin Lu's expression relaxed when he heard the words, but he soon became curious about another question:

"Oh? Then what is the biggest use of this cement?"

"It's for making concrete."

Concrete refers to the miscellaneous matter mixed with water, sand, stones, etc., using cement as a binder.

Its hardness and stability are even far higher than that of simple cement blocks.

This time, Gu Yanshu didn't even wait for Qin Lu to ask questions, and directly took out a small piece of concrete from the side and placed it in front of Qin Lu.

From the piece of concrete that Gu Yanshu took out, Qin Lu could even clearly see the gravel and stones wrapped in it.

But even if Qin Lu tried to break it with his hands, he couldn't take the stone out of the concrete.

"Such a piece of concrete requires a small amount of cement, but its hardness is much higher than that of a simple cement block."

Noticing Qin Lu's actions, Gu Yanshu laughed a little. Of course, he did not forget the serious thing that Qin Lu and the fifth prince said at the beginning:

"According to the hardness of this concrete, if it is used to build a dam, there will be no need to tear down the dam and rebuild it for at least ten years. You said, if Prince Li's mansion used such materials to build the dam, the emperor would still choose the eldest prince." ?"

"Of course not!"

Before Qin Lu could speak, the fifth prince had already given the answer.

After all, knowing a father is like a son, in the heart of the emperor, checks and balances and water control may be very important, but the people of Tianqi are even more important.

Now that there is such a material as concrete, the emperor will probably give up the water transfer this time, no matter in terms of the safety of the dam or the length of the service life.

It can also be seen from Qin Lu's expression that he agrees with this point of view, but compared with the fifth prince, Qin Lu did not express his opinion immediately:

"My lord would like to see the process of making the concrete first. Is it possible?"

"Of course." Gu Yanshu nodded without thinking.

The reason why he started playing tricks on Qin Lu was because he wanted to give him a surprise.

Later, he had a close relationship with Qin Lu because the cement production process had not progressed, and he was afraid of disappointing Qin Lu.

Now that everything has been made, of course there is no need to hide it.

After nodding, Gu Yanshu stood up directly, and led Qin Lu to the small courtyard behind.

Instruct the craftsman to demonstrate the concrete production process in front of Qin Lu.

While the craftsman was moving, Gu Yanshu did not forget to explain:

"The use of concrete, for example, is far more than just building dams. It can also be used to build city walls, build bridges and roads, and even build houses."

"According to the power of Prince Li's House, it is naturally impossible to apply concrete to such a wide range. At that time, we can select some partners to work together."

"And the production of this concrete, in addition to the proportion of sand and gravel, the most important thing is the cement."

"Prince Li's Mansion only needs to master the production method and formula of cement ash to be invincible."

……

In just half an hour, Gu Yanshu had already talked to Qin Lu about the use of this concrete and the idea in his heart.

Rao Qin Lu did not expect that Gu Yanshu had thought of such a long-term situation.

Build dikes and walls, build bridges and build roads...

At this time, Qin Lu finally understood why his princess was so concerned about making this cement.

Why did he persuade Gu Yanshu to take a break when he saw that Gu Yanshu's research on cement hadn't progressed a few days ago, and he got that answer.

If this concrete can really be used in every place in Tianqi as Gu Yanshu said, then the sooner this item appears, the better!

Aside from other things, let's talk about the strength of the concrete, even if it is only used to build strength, why would Tianqi be unable to resist foreign enemies, and how could he be worried that those things would come back again in the future?

Just as Qin Lu followed Gu Yanshu's description and entered the blueprint he imagined, the craftsmen also stopped their movements.

Gu Yanshu slightly raised his chin in the direction where the craftsmen were busy:

"Now the concrete is finished. After it solidifies and dries, it will be the concrete stone I showed the prince."

Qin Lu heard the words, and subconsciously looked at the time on the incense stick next to him.

It was found that the entire process from the very beginning of mixing to the present concrete forming took this craftsman about two sticks of time.

In the past, Qin Lu also participated in the construction of the city wall with the soldiers.

It consumes more time and manpower than the production of concrete.

Knowing that now, Qin Lu finally understood what Gu Yanshu meant by "the production method is simpler, saves time and effort" just now!

Relatively speaking, what the Fifth Prince thinks is much simpler:

"This thing is good! The Third Emperor's Sister-in-Law is the best. Let me see how the Eldest Prince will compete with the Third Emperor Brother!"

Although the Fifth Prince's thought is simple, it has to be said that it is also very crucial.

Whether it is building walls or building bridges and roads, this is a matter of later.

The most important thing before Prince Li's mansion right now is the construction of the dam in Yizhou.

Although Qin Lu no longer needs to use things like building dams to consolidate his position, he can't let the eldest prince use this thing to continue to climb up.

In the end, Qin Lu naturally took the cement block and concrete stone into the palace without thinking about it.

At this time, the First Prince's residence was also full of aides.

They are all discussing how to grab the matter of building the dam in Yizhou.

It was at this time that the news of Qin Lu's entry into the palace reached the ears of the First Prince.

"Did he go with something, or empty-handed?"

This was the eldest prince's first reaction when he heard that Qin Lu had entered the palace again.

Observing the First Prince's expression, the people below carefully gave an answer:

"Looks like I brought a big box."

As expected, the eldest prince's face darkened immediately:

Bringing things to see the father again?

Is this Prince Li's mansion over?

Is this Gu Yanshu finished?

Gu Yanshu and Qin Lu have been married for so long, and their work during that period is not low-key.

Naturally, the eldest prince has already seen some clues from this, knowing that the Prince Li's mansion has been in the limelight recently, and that it was able to produce so many rare gadgets, all thanks to the power of Gu Yanshu.

For this reason, I will not mention how the eldest prince and the noble concubine regretted it, after all, the matter is now a foregone conclusion, even if they regret it, nothing can be changed.

At first, the imperial concubine thought about starting from Cheng Enhou's mansion to show Gu Yanshu a little color.

Unexpectedly, in just a few months, Cheng Enhou's mansion has undergone tremendous changes.

Not to mention that Gu Hongji, Marquis of Cheng'en, married again, this successor is still an extremely powerful figure.

Aunt Chang, who helped the imperial concubine in the past and pushed Gu Yanshu to Qin Lu's side, was oppressed badly after the new wife came in.

Now in the backyard of Hou's mansion, he was so well-handled that he didn't even dare to take a breath, let alone help them deal with Gu Yanshu.

As for Cheng Enhou?

It is also useless.

In the past, he was able to say a few words, but since the stepmother entered the door, he has been trained to be more obedient.

Who in Beijing doesn't know that the stepwife of the Marquis of Cheng'en's mansion is capable?

He is not young and his wrist is not small, so if he is submissive to his husband, he will never dare to go west if he is asked to go east.

Not to mention Gu Yanli, the eldest son of the Marquis of Chengen's Mansion.

This person had pampered Gu Yanshu to the fullest before, not to mention that when the imperial court conscripted soldiers this year, Gu Yanli directly joined Qin Lun's command.

Now, in just over a month, he has directly achieved the position of the small captain, and the relationship with Prince Li's mansion is much closer, making it impossible for people to start.

It seems that the imperial concubine finally found a breakthrough.

Those are the sons and daughters of Aunt Chang, the second young master and the third young lady in Cheng Enhou's mansion.

Especially that Gu Mingrong, because Qin Lun's kick ruined her body and reputation, she really hated Qin Lun in her heart.

Who knew that after contacting them, they realized that these two people were useless.

Kong has hatred but no ability, and is crushed by Cheng Enhou's stepmother, and dare not do any small tricks.

In the end, the imperial concubine and the eldest prince could only give up the idea of ​​starting from Cheng Enhou's mansion, and they simply stopped thinking about Gu Yanshu, seeing nothing for nothing.

Who knows that they don't think about it, but Gu Yanshu has no intention of letting them go.

How long has it been since you started jumping around again?

And for some reason, the eldest prince always felt that it was not a good thing for Qin Lutiao to enter the palace at this time.

What happened next also confirmed the First Prince's thoughts.

After a while, the eldest prince received news from the palace:

King Li brought two stone-like things into the palace this time, and he knew what he said to the emperor. The emperor was very happy and praised King Li very much.

Before the eldest prince could figure out what those two stones were and why they made the emperor react like this, he heard another news from the palace:

Before King Li left, the emperor had already issued a clear decree to go to Yizhou to build the dam and leave it to King Li to be responsible.

This news directly exploded in the First Prince's residence:

In the past, for such an important matter, the emperor always announced the results in the early morning. When will he make a decree in private?

At the end of the discussion, everyone agreed that the problem came from the two stones that Qin Lun brought into the palace.

I don't know what it is that can actually make the emperor change his usual habits.

As for this object, the First Prince's aides did not see the real thing, so naturally they couldn't discuss why.

In the end, the eldest prince decided to go to the palace himself. Even if he couldn't go to ask his father, he still wanted to see if he could get a clue or two from the imperial concubine.

On the one hand, the eldest prince was annoyed by the fact that Qin Lu was handed over to build the dam in Yizhou. On the other hand, Gu Yanshu was also very upset.

"My lord will leave tomorrow?"

Even though he already knew the answer, Gu Yanshu couldn't help asking again when he saw Xingren who was busy inside and outside the house, packing up for Qin Lu.

"We will leave tomorrow. What the father means is that no matter whether it is a fuss about the Zhizhou of Yizhou or not, it is related to the safety of the people. The court must pay attention to it. The flood period is approaching, so there must be no delay."

Even though he had already answered it once, Qin Lu patiently gave Gu Yanshu the answer again.

Gu Yanshu pursed his lips, and said the question that made him uncomfortable:

"Then I really can't go with the prince?"

Qin Lu shook his head, and gave Gu Yanshu a negative answer:

"No, there is no such rule."

Not only was there no such rule, Qin Lu even mentioned it when receiving the order.

It was said that the concrete was made by Gu Yanshu, whether it is possible to take the princess with him, but the emperor clearly refused.

Although Qin Lu was disappointed, he also knew that when a general leaves the capital, his family members cannot follow him. This has been a rule since ancient times.

Of course, Qin Lu didn't tell Gu Yanshu these words, because his princess is suffering enough now.

Sure enough, as soon as these words came out, the expression on Gu Yanshu's face turned ugly again.

Since getting married, Gu Yanshu has never been separated from Qin Lu.

Although the two are usually busy with their own affairs and rarely get tired of being together during the day, at least they will eat and sleep together.

Gu Yanshu has long been used to the sense of security of falling asleep in Qin Lu's arms during the long night.

Now that he suddenly heard that the two of them were going to separate, and the separation would last at least two or three months, how could Gu Yanshu be willing?

In the past, Gu Yanshu never imagined that he would have such a hypocritical day.

But when such a thing happened, Gu Yanshu realized that not only would he have such a hypocritical day, he was even two points more hypocritical than the most hypocritical words and descriptions he had seen before!

If it wasn't for his rationality, Gu Yanshu even wanted to step forward and interrupt Xingren's action of packing his luggage, as if he could leave Qin Lu behind.

"Don't be sad, it's only two or three months, I assure you, when the matter is over, I will return to Beijing immediately."

Qin Lu stepped forward, gently rubbed the back of Gu Yanshu's neck, and comforted him in a low voice.

Originally, Qin Lu wanted to tease his princess, but now he can't bear it in the past two or three months. If the border war resumes one day later, he will be gone for a year and a half, how can the princess bear it?

But when he saw the uncomfortable expression on his princess's face, such words seemed to be blocked in his throat, and he couldn't say anything.

At this time, Qin Lu suddenly realized that it was not only his concubine, but also himself, and his heart was full of reluctance at this time.

In the past in the army, Qin Lu often heard people under his command say that he was reluctant to part with his wife and missed his parents and children.

At that time, Qin Lu only thought that they were looking for a common topic.

Because the departure of his biological mother seemed to have taken away most of Qin Lu's emotions. After that, Qin Lu seldom realized what lovesickness is like.

However, now, seeing Gu Yanshu's face full of reluctance and reluctance, and the appearance of tugging at the corner of his clothes and refusing to let it go, Qin Lu seemed to understand what the "reluctance" in the mouths of those soldiers meant.

"That will take at least three months."

Gu Yanshu tugged at Qin Lu's clothes by his waist, muttering in a low voice.

According to Yizhou's previous flood season predictions, this year's flood season may occur in three months.

This was the first time Tianqi used concrete to build a dam, and the concrete was still provided by Prince Li's Mansion.

No matter from which point of view, Qin Lu had to stay in Yizhou until the flood season began and saw the effect of the concrete dam with his own eyes before returning to Beijing with confidence.

According to Qin Lu's temperament, perhaps he would not leave until the worst tide receded and he was sure that Yizhou was safe and sound.

If so, it will take at least five months.

Thinking of this, Gu Yanshu couldn't help but bury his face in Qin Lu's arms. Before he left, he already felt missing him.

Seeing Gu Yanshu's appearance, Qin Lu felt a burst of reluctance in his heart:

"Why don't I go and tell my father that this matter will be in charge of the fifth emperor's younger brother, so I won't go?"

Hearing the seriousness in Qin Lu's tone, Gu Yanshu raised his head without thinking:

"No! This is the first time concrete has been used, and the prince should do it out of emotion and reason!"

It's not that he doesn't worry about Qin Hao, but that for the first time, credit and risk coexist.

As the first person to eat crabs, one must be mentally prepared to be poisoned to death.

As a person from later generations, Gu Yanshu has seen the era when concrete was widely used, so he naturally knows that these crabs are not only non-toxic, but also have plump meat, which is a rare delicacy.

He and Qin Lu's husband and wife are one body, and the tacit understanding between the two has long been beyond the reach of others, so Qin Lu is also willing to believe Gu Yanshu's words, and believes that this crab is not poisonous.

But Gu Yanshu couldn't guarantee that the fifth prince would believe that the crab was not poisonous.

Even if the Fifth Prince is willing to believe it, it's hard to guarantee that he won't feel bad about it.

Xiaolu in his family doesn't have many companions anymore, how could he have the heart to let the Fifth Prince be divorced from him because of this incident?

Taking a ten thousand step back, even if the Fifth Prince would not have any dissatisfaction with Qin Lu at this time, what about the Emperor?

If the emperor knew that Qin Lu was unwilling to go to Yizhou because of him, what would he think?

The hero is short of breath, but the son and daughter love each other...

He had worked so hard for so long to gain a good opinion of Prince Li's residence on the emperor's side, and he must not fall short because of this incident!

Thinking of this, Gu Yanshu couldn't help but stare at Qin Lu with wide eyes:

"The prince said this to let me know that I am a stumbling block on the prince's road to success?"

Seeing Gu Yanshu's expression, Qin Lu knew that he was slowing down, and smiled in a low voice:

"This is what the princess herself said, but this king didn't say that."

"Didn't the prince say everything?"

Gu Yanshu glanced at Qin Lu angrily, stood up simply, walked to Xingren's side, and packed Qin Lu's luggage together with him:

"Yizhou is much warmer than Kyoto, so you can bring less thick clothes, but don't forget to pack two, you can wear them when the temperature cools down."

"It's said that poor families get rich, and I'll get some silver notes and soft goods for the prince later, just in case."

"Also, I don't know what will happen on the way. Remember to bring more people with you when you leave."

……

Listening to Gu Yanshu's rare ramblings, the corners of Qin Lu's lips could not help but draw a curve.

Hearing that Gu Yanshu mentioned the matter of leading someone again, he seemed to have thought of something:

"Things in the mansion are basically on the right track. This time, I can just bring Xingren with me. If Xingren is not here, the princess may have to pay more attention to the affairs of the mansion."

"My lord doesn't bring Zhi Ge?" Gu Yanshu frowned, his eyes full of disapproval.

"Xingren's kung fu is not much different from Zhige's. Only when Zhige stays in the palace can I rest assured. Don't let me go out and worry about the princess, okay?"

Qin Lu lowered his head and explained to Gu Yanshu in a low voice.

Although Gu Yanshu has been practicing martial arts with him for some time, his three-legged kung fu is enough to deal with hooligans on the street.

If he left, the palace would definitely send out half of the hidden guards. By then, it would not be an easy task to make the palace of Prince Li complete with iron buckets.

Even though they knew that this was under the emperor's feet, even if he was not around, no one dared to take action against Prince Li's mansion easily.

But what if?

What if the eldest prince jumps over the wall in a hurry?

What if there are so few unlucky ones?

He would feel uneasy if he didn't leave Zhige behind.

Faced with the more serious expression in Shang Qin Lu's eyes than ever before, Gu Yanshu was silent for a moment, and finally nodded:

"it is good."