Li Hu took the paper from Liu Shijun's hand in a daze, unfolded it, and saw a few words written on it: "Brother Tiger, Lord Liu wants to see the cement kiln, I really can't pull away, you take him around to visit, explain, let him understand our advanced cement technology!" ”

These words are written on the paper with charcoal ink, the dragon flies and the phoenix dances, and there are many simplified characters, looking at the handwriting, there is no doubt that it is Qian Yu. But it's too child's play to let the other party watch it at will in the cement kiln, right? Not only that, but let me explain it on the side, so you are not afraid of being learned?

In ancient times, craftsmen have always cherished their own brooms for secret recipes and never showed them. Many small inventions seem to be exquisite, but in fact, they are only separated by a layer of paper, and if they are seen through, it is easy to starve the master to death for the apprentices.

And Qian Yu doesn't seem to have the awareness of this, no matter who it is, as long as he asks, he will hold the other party, explain it to him thoroughly, and look at his posture, and even have a posture that you will never give up.

Li Hu admires Qian Yu's mind very much, and his progress today is inseparable from Qian Yu's characteristics. But for Li Hu, it's nothing to learn by himself, it's not very pleasant to let him teach others, it's all his own brainchild, it's a loss to take it out like this!

"Since there is a letter from Mr. Qian, Lord Liu, please!" Li Hu still decided to keep an eye on it, he only said something on the surface, involving the core of the technology, and directly vaguely past, and when the other party asked, he said that he didn't know, so that he wouldn't worry about leaks.

"I'm so smart!" Li Hu thought proudly.

The cement kiln in Yunxi Village is built on the open space not far from Yunxi, and there are fifty or sixty of them, scattered and distributed. From a high vantage point, the cement kilns are neatly arranged, both horizontally and vertically, and it is clear that special calculations have been made before they are built.

What impressed Liu Shijun the most about the cement kiln was that it was clean.

Its firing is similar to lime, and for this dusty product, the factory area is often dusty, and if you want to ensure cleanliness, you can only keep cleaning.

For the average lime kiln, non-stop cleaning is very time-consuming and labor-intensive, so most kiln owners ignore it.

But the cement kiln that Liu Shijun saw was completely different, a few villagers with pig noses kept waving brooms to sweep the cement on the ground clean, compared to the dirty and messy ordinary lime kiln, it is much more comfortable here.

Liu Shijun nodded with satisfaction: "I heard Qian Yu say, cement is the same as lime, inhaling it into the lungs will harm human health, you spend so much manpower and material resources to ensure that the site is clean, it is rare!" ”

Li Hu was stunned: "Mr. Qian said that if cement is sucked into the lungs, will it harm human health?" ”

Liu Shijun said strangely: "Yes, why, you don't know about this?" ”

Li Hu shook his head: "I haven't heard of this statement. ”

Liu Shijun was surprised: "Haven't heard of it?" So why do you have so many people in charge of cleaning the road? It's a lot of work. ”

Li Hu: "Of course, it's for money!" I have experimented, the cement dust particles that can float into the air and fall are very delicate, as long as they are collected, they are the first-class products in cement, and they are sold for at least two pennies more per catty! ”

Just to sell for more money? The corners of Liu Shijun's mouth twitched, and this Qian Yu was about to get into the eyes of the money.

When Jiang Feng reported to himself that he was going to purchase 10,000 taels of cement, he was taken aback. To build a gunpowder workshop, it costs 10,000 taels of silver for cement alone? Is your workshop made of gold? And when he knew that this was just an upfront investment, and that he would have to buy more of this thing in the future, he immediately couldn't sit still.

Jiang Feng, a captain, doesn't have much concept of silver, he is different, as the head of the first-class guard with a knife, he is very sensitive to large silver expenditures. 10,000 taels of silver, Qingfeng County's annual taxes are not so much!

He immediately stopped everything he was doing and found Jiang Feng as soon as possible, he wanted to see what kind of treasure it was, and it cost so much silver.

Qian Yu gave a cement quotation of one pound and five Wen, and said that this was a discount given by the imperial court to see the face of the court. Liu Shijun didn't know what to say for an instant, don't you know that lime, which has a similar function to cement, can buy fifteen catties for a penny?

However, after he saw Jiang Feng show him how strong the walls were made of cement mortar, he stopped talking. I saw a cement wall more than a foot wide, which was smashed by a strong man with a hammer for a long time, but it was only a small gap, this thing is harder than a stone!

If you use this thing to build a city wall, not to mention the war horses of the Hu people, even if it is the top siege vehicle, there is nothing to do with it, right? In this way, Qian Yu is not asking for a sky-high price.

Liu Shijun thought about it for a long time, but still thought that it was a bit expensive, cement is not gold and silver jewelry, and buying some can not only be used by himself, but also passed on to future generations. This thing is a consumable, even if it is half a bit expensive, it will be astronomical over the years.

After much thought, he decided to go to the site to observe the firing process of the cement, so that he could roughly calculate the cost of making it. Liu Shijun can allow Qian Yu to make some money from it, but he is not a wronged leader, and it is absolutely impossible to close his eyes and let the other party slaughter him.

Therefore, when he saw that the villagers of Yunxi had swept up the dust on the ground and sold it to himself, the depression in his heart could be imagined, and he wanted to sell it for two more cents, which was a proper fool to treat him as a fool!

"Hmph, wait until I find your loopholes, and see how I deal with you!" Liu Shijun hated to think that if it weren't for someone's relationship that made him unable to move roughly, he would have wanted to arrest Qian Yu directly and force him to hand over the firing method of cement.

Bypassing the factory, Liu Shijun was more and more surprised the more he walked inside, he found that the villagers who burned cement had pig's mouths on their faces, and they were very careful when working, for fear of problems.

Liu Shijun asked with a smile: "Master Li, is the pig's mouth on their face blocking cement particles from entering their mouths?" They act so carefully, does it prevent the cement from being blown away by the wind, which will increase the loss? ”

Li Hu shook his head: "Be careful, just to keep the dust from entering the air...... To control pollution, we must start from the source, don't you know Lord Liu? ”

Liu Shijun......

He could see that this Master Li Hu was extremely hostile to him, so he gaged to interfere with his sight. Thinking of this, the pride in Liu Shijun's bones burst out, you don't want to answer my question, but I want to ask, so all kinds of tricky questions were born in an instant, making Li Hu tired of parrying.

A cement kiln is a cave that burns cement, but there is nothing to look at. But Liu Shijun inspected over and over again. This made Li Hu realize that if he didn't come up with something substantial, Liu Shijun would never stop, so he took the initiative to teach the other party how to watch the kiln fire through the observation hole.

Of course, things like fire-watching tricks are all things he said casually, and Li Hu dares to guarantee that even if he listens to these words without knowing it, he will be surrounded by them, let alone Liu Shijun.

Hmph, if you want to steal the secret recipe I worked so hard to get out, go dream!

The truth is indeed as Li Hu thought, Liu Shijun quickly gave up the idea of trying to figure out the secret recipe through simple observation. Not to mention the complexity of the cement firing process, what if you get the secret recipe? When he took the secret recipe to build the site again, recruited manpower, and waited for the finished cement to come out, the Hu people had already finished robbing and rode back to the grassland.

In order to resist the invasion of the Hu people, it seems that the cement made by Qian Yu can only be used temporarily. Suddenly, he noticed that Li Hu, who was proud of his abandonment, instantly had a new idea in his mind.

"Master Li, what do you think of the guards with knives?"

Li Hu was stunned: "Very good, I heard Mr. Qian say that you are all first-class officials, and you don't need to salute when you see the prime minister!" ”

Liu Shijun laughed and said: "Of course, our status in Dahua has always been transcendent. Although it is not as good as the power and the prime minister, it is better to be at ease. Now there is an urgent shortage of guards with knives, I wonder if you are interested in joining? ”