Sun Er's words made Huo Gang stunned for a moment, what such a question means, people in this era may not know, but Huo Gang knows that such doubts can arise, which means one point, that is, science is enlightening.

Of course, ancient science has long been enlightened, and countless technologies in ancient China have been continuously produced because of such doubts, but none of their doubts have solved a fundamental problem.

Huo Gang was in a trance, did they already have such an idea because of their continuous improvement of technology?

"Sun Lao Er, what you are talking about is nonsense, iron ore is ore because it has impurities, and isn't our smelting to remove impurities? Steel is to further reduce the impurities in the molten iron. Lu Feng said quickly.

"Fart! I don't agree with you, if you're right, you tell us why we have to mix molten iron with lime, and then we can make steel, but in the past, you can directly burn and forge pig iron continuously, repeat this process hundreds of times, and you can also make steel?! Why! It's just a constant beating when you're forging, have you added lime?! Sun Er retorted loudly.

"It's not simple, iron ore is mixed with lime and burned, and it must be that after the lime melts, it can bring out the impurities in the iron ore, and then form slag, which is more difficult to melt, so we can discharge it. As for forging, the impurities in the pig iron, although we cannot see it with our eyes, are definitely there, like a stone embedded in the wood! As you forge it, the stones that are embedded in the wood fall out, so the pig iron turns into steel, what's wrong? Lu Feng's voice also raised directly.

Huo Gang: "......"

To be honest, the two of them were arguing, like Lu Feng's explanation was blunt, but was there anything wrong with his explanation? No, he didn't know what was in it, but Lu Feng said the principle.

"Stop arguing." Huo Gang took a deep breath and stopped the two people.

The two of them immediately saluted Huo Gang at the same time: "Please forgive the chief." ”

None of them spoke to Anno next to them, the reason why they didn't stop Sun Er and the others before was because they knew that Huo Gang was not such a stingy person, and it was very normal for craftsmen to have disputes, you ask Yang Lao Wu, in the past few months, Yang Lao Wu has been about to be noisy by these craftsmen, but he is not a craftsman, he can't tell the craftsmen right from wrong, he, the city lord, is more like an auxiliary.

"Forgive what sins? What are you guilty of? Did you know? I'm very pleased. Huo Gang glanced at them, then looked at the people around him before he spoke.

Gratified? Everyone was thoughtful, but everyone didn't speak, because they knew that Huo Gang still had something to say.

"In ancient times, we would only use tools made of stone, then we would use bronze, then we would use steel, and our tools would become more and more perfect, and this is the process by which we as human beings continue to discover the world and transform the world."

"And this process is because we have doubts about this world, and everyone like Sun Er and them, it is precisely because of these doubts that we continue to make progress."

"To be honest, I actually know what Sun Er said, but I haven't told you, why? It's because, I told you, you don't understand. And this process of constantly discovering doubts, recognizing doubts, and solving doubts is a term that I call science. ”

Huo Gang was talking here, and there were two people not far behind Huo Gang, both of whom were in their forties, one was Han and the other was Turkic. Both of them bowed their heads and worked hard to copy down what Huo Gang said.

Although they copied the Chinese characters, the content copied by the two people was not the same.

This Han Chinese is a truthful copy, but the Turkic is tinged with some mythology, for example, here, the Turkic wrote: "Today, the great god, the great leader of Huo Gang, once again gave a lecture to several of his craftsmen, telling them the secrets of the existence of this heaven and earth, and the gods will name this secret of heaven and earth, which the gods call science." ”

But when Huo Gang touched on specific things, such as how to make this machine, the Turkic man just mentioned it in one stroke, and only told that Huo Gang had granted his people a God-given treasure to make their lives better, and never mentioned how this treasure was made.

And the Han man will record Huo Gang's words truthfully, of course, the two of them have one thing in common, that is, they don't write nonsense. Because paper is still the most lacking thing in Huo Gang's territory.

These two people were requested by Anno and Hu Luwu, Hu Luwu and their shamans had left Huo Gang's territory and went to the grassland to travel to tell about Huo Gang's miracles, but he left behind, and this person would continue to write down Huo Gang's words, and then give them to Mingyue, and then Mingyue would find a way to give them to Hu Luwu.

Huo Gang knew about this, but in the end he didn't care, because if Huo Gang wanted to fight to the west, all kinds of religions were prevailing in the land to the west, and if he wanted to defeat religion, there was only religion! Of course, there are iron hooves, but iron hooves do not solve the fundamental problem.

Sometimes, religion can.

None of the craftsmen spoke, but everyone listened patiently.

"Originally, I thought that I was going to tell these things, and I could only tell them to your children, because children are a blank sheet of paper, they accept the world from scratch, and can accept my theory, but I didn't expect you to have such thoughts, so I hope you can continue to carry forward this kind of thinking in the future."

"Only if you are willing to think, and want to think, will you be able to discover the greater secrets of this world. Secrets of Science! The power of science! For example, I hope that one day, with your strength, I can realize the transmission of thousands of miles, and let me speak here, so that I can speak to Emperor Li Tang of Chang'an. Huo Gang said with a smile.

"Chief...... Is this the power that man can reach? Sun Er was stunned for a moment, and couldn't help but ask.

"I can tell you with certainty that this secret is hidden in this world, as long as you can find it, you can reach it, which can be said to be a myth, or it can be said that it is not a myth, because it has existed in the heavens and the earth since ancient times." Huo Gang said with a smile.

Huo Gang's words made everyone's breathing become short, how they understood Huo Gang didn't care, but Huo Gang needed their spirit.

"But there is a premise for these, then you all have to learn more knowledge, so literacy is the foundation."

"Now, since you asked, I will explain to you how steel is formed, you should all know the Five Elements Doctrine that has been passed down by our Han people from ancient times to the present, gold, wood, water, fire, and earth." Huo Gang looked at them and spoke.

"Yes." Everyone nodded, but they didn't ask.

In fact, this doctrine can be said to be right or wrong. It's wrong because it's too crude and general, and it's right because it's right. ”

"The world is made up of innumerable elements, for example, iron is one element, and copper is another, and everything in the world is made up of countless elements. For example, the soil on the ground contains very little iron, and a lot of silicon, which is also an element. ”

"And these elements, I call them chemistry."

"And the pig iron you are talking about is composed of iron and a large amount of carbon, among which there are very few silicon, sulfur and other different elements, carbon is the kind of coal we burn, there are a lot of carbon elements in it, in addition to dozens of other elements in the coal. For example, there is a lot of carbon in trees. ”

"The carbon element in pig iron accounts for about 2%-4%, and wrought iron is the carbon content of iron element less than 0.02%, which is wrought iron, and steel is between 0.05%-2% carbon content, which is steel." Huo Gang gave them a general explanation.

With Huo Gang's explanation, he could see that the eyes of Lu Feng and Sun Er and the craftsmen around them were getting brighter and brighter, although they didn't understand elements such as carbon, they understood the principle that Huo Gang said.

"Chief, if we can precisely control the carbon content, doesn't that mean we can make stable, high-quality steel?" Sun Er asked with his eyes shining.

"Hahaha!" Huo Gang couldn't help but laugh out loud directly, because Huo Gang felt a ...... from these craftsmen for the first time An indescribable relief and exhilaration, or rather...... For the first time, Huo Gang saw in these craftsmen that in this era, there can be some people who can understand Huo Gang, and people who can understand what he is talking about.

That kind of mood, in this world, maybe only Huo Gang himself can understand.

Although these craftsmen and Anno didn't know what Huo Gang was laughing at, they could hear that Huo Gang was really happy. Xia Zhu, who was standing behind Huo Gang, looked at her master with bright eyes, and she seemed to understand something.

"You're right, in fact, smelting metals is the process of controlling these contents, but you can't do that now, because our science level is not enough, and your knowledge of these elements is not enough."

"Because in this world, such as copper, iron, lead and other elements, I call them metal elements, and there are also different metal elements such as manganese, magnesium, aluminum, etc., and these metal elements are like carbon, if they are mixed with iron in different proportions, they will produce a variety of properties of steel, this kind of steel I call alloy steel, because it is made of a variety of metals."

"The performance of these steels is far beyond your imagination, in fact, there are many elements in this world that are not metal elements, but these objects that are not made of metal elements may be more powerful than objects made of metal elements."

"Take the ceramics you're good at, Sun Er, do you know? There are some ceramics that have wear resistance, high temperature resistance, and even the strength and hardness of these ceramics are stronger than steel! Huo Gang said with a smile.