Soon, the little fox came running over.

"My Lord, what do you want me to do?" Gaoglisi smiled.

"You are in a much better mental state than before." Field patted the little fox's head.

Gaoglisi hugged her tail shyly: "Well, maybe it's because I found my own value."

"Very good, I just need to build a steel production line."

Field took her to the industrial zone of Night Territory.

Today's industrial zone is no longer a pile of shabby workshops. There are two small factories making wooden furniture alone. In addition, the wood, soap, flour, paper and blacksmith shops are strictly planned, just like a complex industrial park.

The most eye-catching are the eight iron-making blast furnaces in the east, which are like chimneys, billowing thick smoke. The peculiar thing is that the blast furnaces are built continuously, not separated. The molten pig iron produced in one blast furnace is directly poured into another blast furnace to make molten iron.

The craftsmen were smelting iron in an orderly manner, while the slaves were blowing air for the blast furnace, and the heat was rolling.

"Do you know what the key to steelmaking is?"

"Hmm..."

Gorges was about to answer the craftsmen's proficiency or temperature, but seeing Field's "test you" expression, she immediately fell into deep thought.

"Maybe it's charcoal?" Gaoglis considered, "Since the construction of the blast furnace, our iron production has increased many times, and we have made a lot of farm tools. But~ to make a steel sword, the craftsmen will beat the wrought iron and the charcoal together until they are beaten together."

"I once asked the craftsmen why they put iron and charcoal, two unrelated things, together. They said they didn't know, but it was just the experience of their predecessors. I think this is probably the key to the problem."

Field cast a surprised look.

If I hadn't systematically studied the knowledge of steel, I would definitely not have thought that the key to steel is the carbon content.

"I remember that the territory has only made a few steel swords. I used them to test the territory's technical level. I didn't expect you to remember them."

"That's right. The key to forging steel lies in the carbon content. The carbon content of pig iron is higher than 2%, while the carbon content of wrought iron is lower than 0.05%, and steel is between the two. Therefore, as long as you have molten iron and carbon, you can definitely get steel by constantly tossing!"

"But the steel obtained by hammering is a luxury. You can't make a few steel swords a year, which is of no use to the territory."

"Carbon content..." Gao Glis kept pondering this obscure word.

"If I say that everything in the world is made up of tiny particles, do you believe it?"

"I believe it." Without hesitation, Gao Glis nodded heavily, "I believe everything the adults say."

Patting the little fox's head, Field promised: "In the future, as long as I am in the territory, come to my study at night, and I will give you a good lesson."

Not caring about the ambiguity of this statement, Gao Glis nodded again solemnly.

"By the way, if you want to make steel, you have to make coke first. Coal is not suitable for steelmaking. Coke is easy to make. Heat the coal to a high temperature of about 1000 degrees to isolate it from oxygen."

Gao Glis was a little dizzy: "Ah, Ah, what is 1000 degrees?"

You can't try it with your hands.

"Our current ironmaking furnace can reach about 1400 degrees. Cooling down is much easier than heating up. The craftsmen and materials here are at your disposal. Just try it boldly. We have time."

There is no science that does not require attempts, and I can't take on everything.

Field took out two drawings: "These are two sets of technologies for crucible steelmaking and converter steel blowing. They can be used with blast furnace ironmaking to form a matching production line. You should learn them first as a knowledge reserve."

Gao Glis took over the two sets of drawings, and her eyes widened instantly, with dense annotations and pictures and texts.

Although I don't understand it very well, it looks very powerful.

"Sir, which one do I need to build?"

The crucible steelmaking technology uses molten iron. The key is the graphite crucible, which allows the molten iron to absorb the carbon in the graphite and increase the carbon content.

The converter blows steel, using molten iron. The key is to blow oxygen into the molten iron while stirring the molten iron to form carbon dioxide and reduce the carbon content.

"I have sent people to find and purchase graphite mines. You need to help me build a hydraulic blast device. Because the process of blowing oxygen takes more than ten hours, it must be hydraulic."

If slaves are used, productivity will still not be liberated.

"I understand, make coke and build hydraulic blasts!" Gao Glis shouted in a baby voice, "Guarantee to complete the task."

Field nodded with satisfaction: "Now let's take action and strive to increase steel production."

After having steel, we can manufacture plate armor wholesale, cement, steam engines, various lathe tools, these are the key to lighting up technology.

On the other side, everyone from the Adventurer's Guild, wearing all kinds of cool equipment, came to the border of Maple Leaf Territory.

The fortress gate slowly opened, and the soldiers in the fortress looked at the adventurers with sympathetic eyes, as if looking at dead people.

"Get out quickly, we are going to close the gate." Hearing the roar of the corpse in the distance, the soldier was so scared that his face turned pale.

The adventurer with purple hair said sarcastically: "What are you afraid of, brother~"

"You know shit!" The soldier cursed and immediately chose to close the city gate.

"Wow~ Is this the Northern Province? It's different from any place I've explored before." A swordsman looked around in shock, "It's just like hell."

"I don't know which one is more dangerous, here or the super-large underground maze in the Kosei Province."

"Of course it's the underground maze." A red-haired female fighter grinned, "After all, there are living people in and out of the Night Territory."

"Baron Field? I heard that he made a deal with the devil and became a lackey of the evil devil. The imperial guard who came to investigate died in the Maple Leaf Territory."

The adventurers talked about it.

"Yeah, otherwise the Maple Leaf Man... uh uh." Adventurer Edgar was about to say something when he was covered by a priest.

"Don't talk about the nobles. This matter cannot be put on the table."

"Okay, okay, since I have accepted the nobles' mission, I will definitely complete it properly."

Edgar blew his bangs irritably: "After all, I am also a man who wants to be a brave man."

"Brother Edgar, why did our hunter adventure group come here?" The little loli wearing a pink short skirt and holding a purple wooden staff asked timidly while holding the staff.

Edgar leaned down and said coolly to the new members who joined: "Of course it is to get rewards. There are more than a dozen powerful adventure groups exploring the northern province together."

"The first is to scout the movement of the corpse tide and hunt a powerful third-level corpse boss."

"The second is a private mission. Baron Simon privately commissioned us to investigate Baron Field's base."

"This is an S-level mission!"