"Master, why are you so happy?" Seeing Xiao Quzhi holding two shiny transparent stones, he walked into the room and smiled happily.

Li Qi, who was wrapped into a zongzi and half-lying on the bed, was solving the unary equation and the unary inequality couldn't help but stop his pen and asked.

He went into shock due to excessive blood loss, and after returning to Youzhou, Xiao Quzhi helped him bandage his wounds, and then used his own blood to transfuse hundreds of milliliters of blood, and he was saved.

Xiao Quzhi also wanted to use other people's blood, but he didn't know how to test blood type, and he didn't have tools and instruments. There is no way, Xiao Quzhi has to use his own blood, who calls himself type O blood, a universal blood transfusion? The last time Gu Xiaojun lost too much blood, he was also saved in this way.

"Well, that's a good solution, let's take a break. Show you a good thing! Xiao Qubing took two exercise papers, except for the last three big questions, he hadn't started to do them, and the front ones were all done correctly.

This apprentice is smart, in less than a month, he has learned all the elementary school math content, and now he is learning junior high school algebra content.

It's just hard work, I have to spend an hour every day preparing for class, writing the course in a notebook, and then spending another one to give him a lecture.

However, Xiao Qu's illness can also be opened, so he should go through the system knowledge he has learned again, sort it out, and forget it when he can save it. After teaching Li Qi, he can also give it to Aliyi to study, and when the time comes, he will also set up a school, these are ready-made textbooks, and there is no need to prepare them temporarily.

Fortunately, Li Qi is smart enough, hard enough, and learns quickly, so that Xiao Quzhi has a sense of accomplishment and nobility, and more than a thousand years later, the scientific and systematic knowledge civilization. It's about going through yourself. It spread to the land of Datang in advance.

Every time I think about it. Xiao Quzhi felt that he was doing a very noble and great cause! than defeating the enemy on the battlefield, and helping Datang eliminate all foreign enemies, it makes him feel longing and excitement.

Didn't that say that? Science and technology are the primary productive forces.

Foreign enemies cannot be killed, especially the barbarians in those bitter cold places, who always kill one after another, and the more advanced agricultural civilization is always threatened by the destruction or destruction of these wild people.

To put it bluntly, it's not that the barriers of science and technology are too easy to break, and these savages have just come out of the deep mountains and old forests. As long as you master simple techniques such as iron smelting, rely on the soldiers of the whole people and the fierce spirit that has struggled out of the poor mountains and bad waters, it is easy to threaten or defeat the Central Plains civilization.

But if Xiao Quzhi has the ability to make Datang reach the scientific and technological level of the modern industrial revolution in the later generations, a few decades later. Then from now on, Datang, or the whole of China, will no longer be afraid of the threat of these barbarians.

Because the gap in the level of science and technology is too big, it is not at all something that these barbarians can master, no matter how fierce you are, no matter how strong you are, how can you fight, can you beat muskets and cannons?

Not to mention that technology will continue to advance. If these barbarians don't want to be completely wiped out, they can only surrender and learn from Datang science and technology culture. Then the development of world order and history will no longer be the same old path as in another time and space...... Well, it seems like I'm thinking a little too much.

"What good things make Master so happy?" Li Qi looked at the two long diamond-shaped stones on Xiao Quai's hand, which were similar to crystals but far worse than crystals, and felt that he couldn't see where they were good.

Xiao Quzhi smiled and said: "Of course Master is happy, I never thought that the quality of the trona produced in the salt water lake here would be so good, and the stock would be so much!" ”

"Trona?" Li Qi looked puzzled and asked, "What is the use of this trona?" ”

"It's so useful!" Xiao Quzhi's face was radiant: "Xiao Qi, you know, our Sihai Trading Company now focuses on two products, the same soap and soap, and the same glass, both of which require an important raw material, that is, soda ash." And this trona is heated a little, and the result is soda ash. ”

Seeing that he didn't understand, Xiao Quzhi said again: "This soda ash is the alkaline noodles used to make steamed cakes (steamed bread in later generations) and steamed bread (steamed buns in later generations). The last time I made so many pieces of soap, I almost bought all the alkaline noodles in Huaqing Palace and Chang'an City, and there was no way to produce them in large quantities, and the same is true for glass.

Now it's different, there are seven salt water lakes here, and there are hundreds of thousands of catties of such quality trona. With these tronas, we can make as many soaps and glasses as we want.

Xiaoqi, in fact, you don't know, this time why I personally came to lead troops to fight Youzhou, instead of letting the nearby Shuofang army quell the rebellion, an important reason is for the trona in the salt water lake here. ”

Li Qi swallowed a mouthful of saliva unconsciously, he knew that those glassware that were sold by the Hu merchants of the Western Regions at sky-high prices, in fact, only needed some quartz sand and alkali surface, and the limestone could be easily burned. Moreover, Master, what they burned was dozens of times better than the glass sold by Hu Shang in the Western Regions.

Now the master said that he can make as much as he wants, and how much money he can make in the future, he can't even think about it.

"Then can't we make all the money that those Hu merchants can make? Too much money to make every year? ”

Xiao Quzhi nodded and said excitedly: "In addition, the more important use of soda ash can also be used to make paper!" ”

"Papermaking?" Li Qi's eyes began to bloom again, and his eyes were full of curiosity and admiration, how could Master know everything.

"Well, using soda ash to make paper, the time of papermaking can be shortened by dozens of times, and the cost can be reduced to less than one percent, or even half of the original!" Xiao Quzhi smiled bitterly and nodded, as soon as he thought of this, he couldn't help but sigh and be proud.

Although papermaking was invented in the Eastern Han Dynasty, the papermaking process has not improved much for hundreds of years, and the paper of the Tang Dynasty is expensive, which is comparable to the luxury goods of later generations.

Not to mention anything else, even the official documents of government departments are written on the front and on the back, and even in the aristocratic families of the Tang Dynasty, how many pieces of paper are stored at home to show that they are rich and have heritage.

Because paper is expensive, there was also an anecdote like this. It is said that when Du Xian, the prime minister of the Kaiyuan Dynasty, left office when he joined the army in Wuzhou, his colleagues and subordinates gave him 10,000 pieces of paper saved in the yamen, which is still a common practice in officialdom.

Du Xian was incorruptible, so he accepted only a hundred pieces of paper as a sign of his acceptance of the friendship of his colleagues, and returned the rest to them. After this incident was spread, it was also rumored to be a beautiful talk for a while, calling Du Xian a hundred papers to join the army.

This shows how precious the paper of the Tang Dynasty was. Because of this, in order to set an example, even the emperor did not dare to use paper when going to the toilet, but used toilet chips. Xiao Quai, who was used to using toilet paper before, used a few sheets of rough-edged coarse paper in the Tang Dynasty, and could only use it secretly, for fear of being seen, like a thief.

Therefore, Xiao Qubing deliberately went to find out the reason, and found that it was not to blame that paper was expensive, but that the production process of papermaking in this period was too backward.

For example, in the first process, the bamboo is chopped and floated in the pond, and the tender bamboo, bark, straw, and hemp are soaked in the pond for more than 100 days, and the unwanted parts of these raw materials are slowly decomposed and washed away by natural microorganisms.

After that, the boiling process is to add lime and cook it for eight days and eight nights, which can be imagined how much labor it costs, how much fuel it costs, and how low the efficiency is. It's no surprise that paper is so expensive.

Although Xiao Qu was sick in the previous time and space, he didn't know how to make paper, but he remembered the story that his father told him about the theft of Chinese rice paper manufacturing technology in the 80s. One of them is said to be like those brain-disabled officials in a county in Zhejiang Province offering treasures, and the concentration of alkaline water belonging to the top-secret formula is also revealed to the little devils and plates.

The formula and concentration of this alkaline water mainly refer to the concentration of caustic soda. And with soda ash, how to make caustic soda is not too easy for Xiao Quai, who has just completed all the high school courses and scored more than 140 points in the chemistry mock test.

Xiao Quzhi believes that with the alkaline water liquid prepared by the later process, the efficiency of separating wood fibers into pulp will be greatly improved, and the cost and production cycle of paper will also be greatly reduced.

That's the power of technology!

A simple improvement can improve production efficiency and reduce production costs by several times or dozens of times. Xiao Quzhi believes that in the future, his paper mill will definitely become one of the most profitable pillar industries.

More importantly, the beneficial impact of the popularization of paper on society cannot be underestimated.

As for the concentration formula of alkaline water, there is no need to worry about this, hand it over to professionals, tell them this method, and they will continue to study it, and I believe that it will be developed soon. Regarding the wisdom of the ancient Chinese, Xiao Qu has never doubted it since he was seriously ill.

Of course, for more than a decade, this technology must also be kept secret.

As a native of Datang, how could he not know how huge and far-reaching this technological progress would have on Datang.

It is secondary to the merchants of the four seas to make more money, but the important thing is to benefit the country and the people, which is simply a merit!

"That's why the master appointed He Xiaofen as the Youzhou Thorn History, just to ask him to help us collect these trona?"

Xiao Quzhi nodded: "In addition, I also want him to help us herd horses, these Husogdian people in Liuzhou are not only good at business, but also good at herding horses and horses, so let us help us raise horses." Although the Hequ Jian horse is not as good as the Arabian war horse, it is also ranked in the top three in Datang. ”

Li Qi frowned slightly, Xiao Qu's illness originally ordered, in order to prevent leakage, where he passed, he killed all the local Liuzhou Hu men, and he was still a little unbearable.

But since he was seriously injured by the Dang Xiang Qiang cavalry and Zhang Xiancheng the day before yesterday, he became extremely hated in his heart for the nature of revenge on the Hu people, and hated that he could not kill all the rebellious Hu people.

"We Han people can also do these things, why do we have to hand them over to these Hu people to do?"

Xiao Quzhi thought for a while and said, "Xiao Qi, did you start to reject all Hu people in your heart after what happened the day before yesterday?" ”

Li Qi's heroic face was full of silence, and he didn't speak, and not speaking was acquiescence. (To be continued.) )