The Julu government has made the best coordination of all the manpower in Julu County. In the overall planning strategy, the most powerful people do the production activities that require the most strength, and the people with the least strength do the production that require the least strength.

Under this strategy, the able-bodied men and women went to work in the fields, while the frail old, weak, women and children stayed in Julu City. Among them, the children under the age of twelve went to school, and the old and women with weak physical strength went to work on those tasks.

Manual production that does not require high physical strength and is relatively light, such as paper making, weaving, pottery making, etc. Julu has prosperous industries and can provide enough production jobs.

Between children and the old, weak, women and children, there is a special group, those teenagers between the ages of fourteen and under eighteen. Although these people are no longer children, although they can already work in the fields, those between the ages of fourteen and eighteen

At this age, the body has not yet grown up and the strength is not sufficient, so it is not suitable to do heavy farm work prematurely.

Li Mengxi has special arrangements for the age group of fourteen to eighteen years old. In view of the fact that in this age group, they are older and have a certain degree of working ability, it is not appropriate for these half-year-olds to study in school full-time.

It is a waste of labor. In addition, in view of the fact that the age group of fourteen to eighteen years old is still in the youth stage, when the learning ability is still relatively strong, and the number of Julu craftsmen is becoming increasingly insufficient, it is necessary to cultivate the potential of craftsmen on a large scale.

Due to various factors, the best arrangement for this group of people aged fourteen to eighteen is to open a technical school and train these people as craftsmen.

Throughout Julu, there are more than 30,000 people between the ages of 14 and 18, and Li Mengxi plans to train all 30,000 people into craftsmen.

Thirty thousand craftsmen are too many for one county in Julu, but in the near future, when we are about to compete for world supremacy, 30,000 craftsmen are too few.

If you don't plan for the short term, you won't be able to plan for the long term. No matter how many craftsmen you train, it won't be enough.

Li Mengxi attached great importance to the prospects of the technical school. He carefully selected outstanding craftsmen in the army. He planned to let these outstanding craftsmen lead thirty or twenty students each. Li Mengxi thought very well. He felt that if one class of craftsmen could be trained in four years,

, one person led twenty people, and four years later, the number of Julu craftsmen increased by twenty times.

The reality is more complicated than Li Mengxi imagined. Most craftsmen regard their craftsmanship as a means of earning a living. They do not want to teach outsiders, which involves fundamental interests and losses, and Li Mengxi's face is not easy to use.

Among the craftsmen, there are some kind-hearted people. Some craftsmen are willing to teach their skills to others, but they stick to the old rules. Before accepting apprentices, the apprentices must give them generous gifts, and the first two years of wages must be paid to the master.

, the rules in the countryside are like this, everyone takes it for granted, but Li Mengxi feels it is extremely bad.

What Li Mengxi wants is a school model that can train craftsmen on a large scale, not an inefficient apprenticeship model where one person takes care of three or five apprentices and then hides them.

Furthermore, Julu implements distribution according to need. No one, no matter the craftsman or the apprentice, has rich money or food. If he wants to give generous gifts, the apprentice must live frugally, which violates the principle of distribution according to need.

Li Mengxi forbade craftsmen to accept apprenticeship gifts. He forced the craftsmen to accept apprentices. He forced twenty students on each craftsman. As a result, the craftsmen accepted the students, collected them, but ignored them.

No one can control Li Mengxi, no one. Li Mengxi tried his best to persuade the craftsmen, but he couldn't persuade them. Li Mengxi decided to teach him in anger, because he didn't believe how difficult craftsmanship could be.

Li Mengxi acted vigorously and quickly, and soon he started his first technical class.

For this trial, Li Mengxi randomly summoned some young men.

In the class, there were 30 half-grown teenagers, and 30 childlike teenagers sat on the floor and listened to the lecture. On the stage, Li Mengxi used his own way to pass on engineering knowledge to the teenagers.

Li Mengxi lit a candle and asked the young people in the audience, "Is the candle lit?"

"It's lit."

"It's on fire."

The boys answered.

Li Mengxi put the bowl on the candle again. After a while, he picked up the bowl again and the candle went out.

Asked the young men why the candles were extinguished, the young men replied casually that they must have put out the candles if they put the bowl up.

"Then, why did the fire go out when the bowl was removed?"

The teenagers couldn't answer common questions if they probed deeper.

Then, show it again.

Li Mengxi lit the candle again. He took a small wooden stick and put it into the flame of the candle. He paused for two or three seconds and took out the stick. He asked the teenagers to observe carefully. The wooden stick in the middle of the bottom flame was lit first.

The stick outside the fire was lit first.

I tried it several times, but it was the same every time. Every time, the two ends of the stick lit up first.

"Why is this so?" Li Mengxi glanced down and asked the teenagers with a smile, "Think about it, who can answer, five pounds of meat."

When the teenagers heard that there was meat, they became excited.

Li Mengxi repeatedly demonstrated two tests on the stage. One test was to hold the candle with a bowl, and the other was to insert a wooden stick into the flame of the candle and remove the wooden stick after burning for a moment.

While demonstrating, Li Mengxi asked questions from time to time to guide the teenagers to think.

Young people are still flexible in their thinking. A smart boy gave the first answer. He said that sticks are easily burned when they are close to the outside of the fire.

This was the answer. Li Mengxi fulfilled his promise on the spot and rewarded the young man with five pounds of meat.

When the other teenagers nearby saw this scene, they were all envious.

Li Mengxi lit the candle again and closed the bowl again. After a while, he opened the bowl and the candle went out again.

This phenomenon has been repeated many times.

Li Mengxi glanced at the young faces, "So, why did the fire go out when the bowl was closed? Why is this so?"

A big boy in the back row seemed to want to say something. He opened his mouth, but seemed to be embarrassed or timid, and hesitantly did not dare to speak. Li Mengxi keenly observed this, and he looked at the big boy.

He waved and said with a smile, "You answer it."

This chapter is not over yet, please click on the next page to continue reading! The young man was called up, and everyone around him looked at him. The young man was extremely cautious. He scratched his head and stammered, "Yes... I am not angry.

"Hey, if you cover the bowl, the air won't be able to get in, and the fire will be extinguished."

Li Mengxi smiled and nodded. He guessed correctly. That was the answer. It was because of his anger.

After appreciating another five kilograms of meat, Li Mengxi explained to the teenagers why candles would go out if they held the bowl, and why when sticks were inserted into the fire, the outside would be lit first while the inside would burn slower. In the final analysis,

, is Qi. To be more precise, there is something in the Qi that can cause fire. Once this kind of thing is burned out, the fire will go out.

The reason why the candle goes out is that after the bowl is placed on the candle, the air is locked, and the combustible things in the air are burned out in a short time, so the candle goes out.

"The flame of a candle can be divided into a flame core, an inner flame, and an outer flame. Think about it, the outer flame is connected to the atmosphere. Are there many combustibles in the atmosphere? If there are many combustibles, the outer flame will burn violently, and the fire will be stronger.

The further inside, the less combustible material and the smaller the fire intensity.

Therefore, when a wooden stick is inserted into a candle flame, the place where it meets the outer flame will catch fire first, the place where it meets the inner flame will turn black, and the place where it meets the center of the flame will turn white."

"Come and see if this is the case."

Li Mengxi handed the candle to the audience and asked the teenagers to test it with their own hands.

The teenagers were full of curiosity. They took the wooden sticks and poked into the candlelight. After a pause for two breaths, they immediately took out the wooden sticks. A group of teenagers gathered together to watch. They took a closer look. Sure enough, there were candles at both ends of the sticks.

It was on fire, and then there was a black line in the middle, and then in the middle, the middle part was obviously at the center of the flame, but it was still white, and it didn't look like it was burning at all.

Li Mengxi demonstrated to the teenagers the relationship between "fire" and "qi", which has its own profound meaning.

Finally, Li Mengxi took out new props. He took out a piece of white wrought iron, a piece of gray pig iron, and a piece of black charcoal.

"Do you all know about charcoal?" Li Mengxi asked.

"Know."

"It's for the fire."

"It's the cook."

The teenagers answered all at once.

Li Mengxi nodded, glanced around, and asked again, "Do you think charcoal is different from a candle? I mean, do you think that a piece of red-hot charcoal fire, if a bowl is placed on top of the charcoal fire, will

Will the charcoal fire go out?"

"It will definitely be destroyed."

"I'm not even angry anymore."

After charcoal finished speaking, Li Mengxi brought the white wrought iron, gray pig iron, and black charcoal together, "Both pig iron and wrought iron are iron, but why? One is white and the other is gray. Why is it like this?"

?”

Li Mengxi showed it very clearly. The three things he held in his hand were black, white and gray. It can be inferred from the color alone that the colors of the three things may have been mixed.

Li Mengxi has guided him to this level, and the young people are at a loss.

As a last resort, Li Mengxi could only directly explain the relationship between charcoal and iron.

"The color of wrought iron is white, the color of charcoal is jet black, and the color of pig iron is gray. This is because of carburization in the iron.

Charcoal is a wonderful thing. When iron contains little carbon, it is wrought iron. Wrought iron is too soft but not hard enough. When iron contains too much carbon, it is pig iron. Pig iron is too hard but not flexible enough.

However, only when there is not too much carbon or too little, and it is both hard and tough, this is what is called [steel]."

After speaking, Li Mengxi asked the young people who were listening attentively, "As I just said, if you are given pig iron, how will you forge it into fine steel?"

The young people had just listened to Li Mengxi's explanation, and the truth was clear. They immediately replied, "Just remove a little bit of the charcoal from the pig iron."

Li Mengxi asked again, "What if we forge steel with wrought iron?"

"Add a little more."

"Add some charcoal."

"Yes." Li Mengxi nodded, "Then, let me ask again, how to add charcoal? How to remove charcoal?"

The atmosphere became quiet again.

Li Mengxi lit the charcoal, burned it until it turned red, put it on a plate and showed it to the teenagers.

"As mentioned, charcoal, like wax, can be ignited.
To be continued...