Of the 100 wooden tablets, only the first one was copied, a total of 2,000 words, and it took seven or eight people half a day to copy them. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

These are all common words, and they are all proficient in the first batch of people in Xia Cheng to learn words from Chen Jian Hongyu.

Those who know how to read may not be good teachers, and they didn't have such systematic textbooks when they used to learn, so Chen Jian called all the people in Yucheng who knew all the words in the first article together, and each of them handed out a wooden tablet and taught them again.

They all knew the words, but they had not heard of the lesson plan annotated by Chen Jian, and after systematically talking about the first text, Chen Jian told them what this first article needed to achieve.

"How long do you think it will take for people who have never read words to learn this first article? And to achieve the kind of results I said? ”

These people all went from not being able to read to being literate, and Chen Jian was worried about whether the fifteen-day time he had set was a bit rushed, but the feedback he received was very confident.

"If everyone had such a wooden tablet, everyone could learn from morning to night every day like the children in Summer City, three days would be enough. If you only study for a short time every day, and you have to work on weekdays, and not everyone has a wooden tablet, twenty days is enough. ”

After asking several people in a row, they all replied like this, Chen Jian put away the wooden tablet and let everyone leave first.

Chen Jian decided to teach them by himself, and then divide what he learned in these three days into half a year to teach those who have no foundation, and then use this half year to write and teach them something else, as the content of the next half year.

To be able to recognize 300 words, to be able to cut and read words, to be able to add and subtract, and it takes about two years of full-time study as enlightenment education. In the future, it is necessary to ensure that the population of the city reaches the level of enlightenment, and those who cannot do it will be fined.

Within ten years, he will train a group of professional teachers who can calculate multiplication and division, land area, simple trigonometric functions, and open square cubes with a pen, and use trigonometric functions and areas to let a group of people have the philosophical concept of the unity of numbers and shapes, and establish special schools of higher learning in the cities -- in this era, those who can calculate trigonometric functions are considered high-level talents.

As long as the first ten years are done well and a reasonable echelon education is completed, every year Xiacheng Yucheng can ensure that he can teach the officials he urgently needs, refine the official economic system of Xiacheng, and exploit the rest of the cities by relying on poor scissors and poor technology, so that at least the integration of officials can be completed in Xiacheng Yucheng, and at the same time improve a new talent selection method that is incompatible with the bloodline theory.

This is also the biggest reason why he has clearly had the advantage of force and technology, but he has not chosen violent conquest for a long time: he lacks enough administrative officials and cadres, and the lack of management talents after violent conquest has led him to make concessions to those hereditary families and acquiesce in the complete independence of each city.

It is not difficult to conquer by force, but what is difficult is the construction after conquest and the rapid growth of civilization. He wants to delay his time, exploiting the rest of the cities with hidden scissors, so as not to arouse their disgust, because they do not perceive it; Take advantage of Xiacheng's emerging advantages of directly transitioning from clans to cities and the political structure without the power of big families to cultivate low-level countrymen. dragged into their own hands there are at least a thousand high-level talents who can command a hundred people who can take up arms and can govern one side when thrown into a small city; 10,000 people who took up arms and were soldiers who threw them into the village could become village chiefs and teach people to read and count and burn kilns in several ways.

If you can conquer it, you can defend it, and if you can assimilate it, you can stabilize it, not a nominal unification that is only a few hundred miles away from Gyeonggi.

From the basic population expansion of Xia City, to the initial scale of the talent training system, from the expansion of the power of the major families in Xia City, to the disappearance of the older generation of city leaders, and the succession of the new generation of city leaders who were influenced by him, ten years is a time that cannot be bypassed.

With this kind of thinking, after completing the simple textbook of "Enlightenment Numbers", Chen Jian thought about all kinds of problems that he might encounter, and wrote the "Ten-Year Development Plan of Xiacheng" through the dim oil lamp, writing out the cause and effect and purpose in a variety of ways, and explaining the various problems that need to be considered in the future management of the city around the node of ten years as much as possible.

After the completion of the renovation next year, all the officials directly under the six divisions of Xiacheng will be mobilized to study and use it as the first batch of teaching materials for the Chengyi Senior School in the future, and the format is almost the same as the Xiacheng New Year's income and expenditure report entrusted to Yu Qian'er in the council a year ago.

As for why he had to write this article with a dim oil lamp, it was not because he wanted this style, because the grease that had not been waxed always had black smoke and no style, but because he was really busy during the day.

Since it is possible to tell many details that the ruling class must know about the officials of Xia Cheng in the future, then it is necessary to pay attention to the issue of secrecy, so when sending people out to find stones, Chen Jian left Ji Bai and twenty people as his personal guards, or the basis of Xia Cheng's military police internal guard force.

The name of the best personal guard force he can think of is "Black Clothes", and in "Warring States Policy", Touch Long said that he hoped that his youngest son would make up for the number of black clothes when he talked about Empress Dowager Zhao.

Originally, he thought of naming these twenty people "Black Clothes", but then he found that there was no basis for calling them Black Clothes, because there was no dye in Xia Cheng at this time, so there was corn soup that he wanted to be sour before.

The most common dye in this era is indigo, which Jian Chen has found, but Xia Cheng has just put on clothes for a few years, and the clothes have not yet developed aesthetic needs outside the body, and there are too many things to be busy with, so it has been postponed for the time being.

In addition, the dye that is easy to find is black, "white sand is black in Nirvana" refers to a black dye in the Zhou Dynasty, translated into the name of the previous life, Nirvana Chen Jian guessed that it was Nirvana instead of black mud.

Because the ancient mineralogical naming of the previous life was not formal, Nirvana itself was alum, that is, potassium aluminum sulfate dodecahydrate, but Chen Jian guessed that Baisha in Nirvana was another kind of alum, or the companion of alum: ferrous sulfate crystals.

It is not black, but when Nirvana encounters tannic acid, it turns black, and even white sand can be stained.

Tannic acid is a substance used by the ancients for a long time in the past to tann fur, and Chen Jian also fought against it when the people of Xiacheng were still eating acorns, which is the source of wine astringency and the culprit of abdominal distension after eating acorns.

A few years ago, tannic acid was an enemy of Xia Cheng, but now the clansmen who no longer eat acorns want to invite this former enemy back.

Persimmons, acorns, and oak bark contain a lot of tannic acid, and the gall of the gallnut tree is even more abundant.

Tannic acid is soluble in water, mashed and dissolved into water, and dried to make a very impure dye tannin. Tannic acid will turn black when it encounters iron, and many apples that have been cut with iron knives will turn black, in addition to the cause of tannin oxidation, iron knives are also an important factor.

The common ochre is an iron oxide, ferric oxide. Ferric oxide will react with acids, and there is no industry with three acids and two alkalis, so we can only consider lactic acid and acetic acid, which are the best ones.

The acetic acid fermentation time is too long, and the vinegar of Xiacheng is also a best-selling condiment, and the cost is too high, so the lactic acid after the warm rice soup is the best choice. The people of Xiacheng like to eat Xuanhu pasta flour, so even after leaving Xiacheng, the ship still carries yeast, the so-called noodle primer, which is suitable to promote the souring of rice soup.

Ochre is trivalent iron, which is not suitable for reacting with tannic acid, so it needs to be reduced with carbon powder in the kiln to produce a part of iron powder, although it cannot be used to make tools, but it is suitable for reacting with lactic acid.

Iron and strong oxidizing acids such as sulfuric acid and concentrated nitric acid form ferric iron, and the rest of the normal conditions are ferric iron, and it is very easy to identify: ferric iron is green, which is also the reason why the glass was green in the eighties of the previous life. The color of ferric iron is difficult to say under normal conditions, unless it is tested with phenol and thiocyanide, but it will become lilac when hydrolyzed under acidic conditions, and the more acidic it is, the more obvious this lilac is.

Chen Jian thought that he could distinguish light purple and light green with the naked eye, so he could observe the color of the rice soup to determine whether it was useful.

After the reduction, the ochre turned black, put into the sour rice soup, and covered the pool with a straw curtain, as if raising nitrifying bacteria, the masons were familiar with it, and the scientific explanation is that ferrous ions will turn into ferric iron when exposed to ultraviolet rays.

While lactic acid reacts slowly with iron powder, a small amount of iron powder that does not participate in the reaction will be oxidized to ferric iron by the residual ferric, and the same ferric iron will be reduced to ferric iron by iron powder to become ferrous lactate soluble in water.

After six or seven days of stuffiness, Jian Chen opened the straw curtain quite apprehensively, only to see a pool of green water, as if autumn had not arrived overnight, but spring had come.

The clansmen stared at the green water that wasted a lot of corn in this pool, and they didn't know what to do, but Chen Jian jumped excitedly when he saw the green water, and asked people to scoop out a bowl, and excitedly called all the Xia City people on the island to watch.

"I'll show you a funny one."

He scooped out half a bowl of the soaked tannic acid solution, and with a shake of his hand, he added it to the bowl of green water, and in an instant, black swimming fish appeared in the original green solution, and finally the entire bowl of water turned black.

Although people were surprised by this, they were extremely utilitarian by Chen Jian's influence, and they were not surprised before they saw the benefits of this thing, and they saw too many things in Xia Cheng, and they would be surprised if they saw something, but they were afraid that their jaws would be difficult to protect.

He deliberately tugged at his somewhat yellowed linen shirt, and while pretending to wipe his hands, he asked inspiringly, "Guess what this thing can do?" ”

Several people stared at the black and blue water, and a person who had been forced by Chen Jian to polish the pine ink all day shouted excitedly: "I know!" This thing can be made into ink, no...... No, not ink, it's ink. No grinding ink. ”

A group of people suddenly realized, but they were guessing in their hearts how much Ji Xia was going to write? Those eight enlightenment essays are only a few dozen words, how much can this pool write?

Chen Jian almost hit the bowl with his head, and praised weakly and reluctantly: "What did you say...... It seems to be true, this thing does make ink. ”

It's not that it seems to be right, but it's true, and blue-black ink is what it is. (To be continued.) )