In a small valley inside, a huge blast furnace was towering high, with about 10, emitting long black smoke, entering the sky, dyeing the clouds like cotton candy directly into black.

From a trimmed path outside the small canyon, there were continuous lucky carriages, and then the burned bamboo charcoal, continuously consolidating the road.

Li Jia took everyone to observe the power of this legendary secret recipe.

Several naked men were pulling the huge bellows hard, and the red liquid pig iron juice was constantly poured onto the cooked iron.

The sledgehammer and small hammers keep hitting, and after several smelting, the carbon content in the pig iron and the wrought iron is balanced and becomes steel.

Because liquid pig iron is used as carburizing agent, the flow rate of carbon is greatly improved, saving a lot of manpower and material resources.

This is the steel filling method.

Afterwards, the blacksmith used low-carbon iron as the back of the knife, and used steel made from the steel pouring method to make the blade of the knife.

The old and young, bronze skin was constantly sweating, and the blue veins on the thick arms burst out, and the temperature was extremely high. Li Jia estimated that it was at least about forty degrees.

After the steel bar as a sword is repeatedly beaten, the highlight comes - quenching.

"Mr., the important step is to quench it!" Zheng Kuan, who contributed the secret recipe, stared straight at the wooden barrel carried in by two strong men, and said in a deep voice, his mouth squirting unconsciously, as if he was a little thirsty. Obviously, he was also extremely nervous.

"Is this again?" Li Jia was obviously extremely curious and hurriedly walked over and looked around. He saw that the wooden barrel was filled with yellow liquid, which seemed to be the urine of some kind of creature.

Sizzy—

The blacksmith clamped up the steel bars and placed them in the yellow liquid in the wooden barrel to quench them. Then, the texture on the surface of the steel bars seemed to change a little, and they were placed in the charcoal fire to burn red, and then continued to beat them...

"This is a cow's urine!" Zheng Kuan hesitated slightly, for fear that Li Langjun would have a temper when he found out, so he thought about it again and again, and said this time.

"Cow pee?" Li Jia was really moved when he learned this information. He had long heard that in ancient times, there were always methods such as using human body fat.

For example, if a general fails to make a sword, he sighs that he wants to learn from his master to commit suicide. His wife Mo Ye cut off his long hair and created a sword.

And using cow urine to quench it is indeed strange.

After waiting for about two hours, a sacred iron knife took shape. Li Jia tried it, and it was indeed quite heavy.

Then he cuts with ordinary swords and the Su Tiejian can cut off ordinary swords in an instant, which is sharp and visible.

"Mr., this method is very strange!" After hammering the knife, Chen blacksmith wiped his sweat and walked over, his face full of joy.

"The wisdom of the ancients is really not as good as that of the ancients!"

"Since it's effective, Zheng Kuan, you should reward you with 500 stagnant coins and a thousand acres of land. If you can teach your children to learn to read and pass the imperial examination in the future, your family will be truly rising!" Li Jia was very honest and promised a thousand gold medals, so she immediately made a reward.

Zheng Kuan, who had been nervous, heard what the husband said, and he didn't care about studying or something. Then he recovered and was quickly grateful and overwhelmed.

"How many blacksmiths are there here now?" Chen Blacksmith was the royal blacksmith brought by Li Jia from Yongzhou. The bellows were born from him, although it was based on Li Jia's description.

"Not many, there are only about twenty people, and the others are apprentices. Those who are really skilled are not enough to count with one hand!" Chen Blacksmith's face turned dark. When he talked about this, he was a little unhappy. There were too few people who were really capable.

There are only a hundred people in the entire workshop, each master brings three to four apprentices, and he only makes dozens of shields, hundreds of spearheads, and hundreds of swords every day. His efficiency has reached the extreme. The only thing he lacks is the blacksmith.

This time, we came here, one was to see the secret recipe, and the other was to observe the specific scenes of the workshop.

"Add points, this speed is not good!" Li Jia urged.

"Mr. Langjun, we have done a lot of effort. No matter how much we have, we really can't increase it!" Chen Jianghu spread his hands and complained.

"Before, I asked those masters to take as many apprentices as possible, but the effect was not very good!"

"Everyone has his own unique skills. Even if he rewards each person with 10 coins, he has few responded. It is enough to say that he has some fur to his disciples!"

"In this way, if anyone teaches an apprentice to reward ten acres of land, and 100% of the apprentice's future salary will be his, until a hundred years later!" Li Jia thought for a moment and found that just rewarding money was useless, and he had to deal with it appropriately.

The reason why those craftsmen don’t want to teach too much is simply because they are afraid that they will teach their disciples and starve their masters to death. They first use the land to tempt them and share their salary. If they don’t do it, they are always stubborn.

The only way is to make him a pure blacksmith and squeeze out the remaining value.

Under Li Jia's care, the workshop has long implemented assembly line operations, quenching, steel filling, pounding, and watering, which have been divided into dozens of steps, but each blacksmith has his own exclusive secrets, and there are different methods of pounding, quenching, and even watering.

Each master brought several disciples, some of whom were playing swords, some hit the shields and gun heads, and did not interfere with each other. Each sword would never have the name of the second blacksmith, and there were so many things to pay attention to.

"Stay for a while, masters, it's time to eat!" At this moment, it was noon, and the chefs came here with food soup and started shouting.

Immediately, everyone put down the guys in their hands, picked up the rice and started eating.

"These are all physical work. Eat some meat every now and then. Everyone has a lot of appetite. They rest for two quarters of an hour at noon!" Chen Jiangtou bent over, noticed Lang Jun's face, and explained softly.

"It's the right thing to do to eat meat. From now on, you will have a meal of meat every two days, and a pot of fish soup every day. Don't be stingy!" Li Jia looked at the pot of tofu and vegetable soup, shook her head, and shouted loudly.

"Brothers, I have worked hard, so I can't afford to drink or eat. Now I'll kill the pig and put ten jars of wine on it. Let's rest for a while!"

"Thank you, my husband--" Everyone immediately smiled happily and bowed together. It was already a fairy day to be able to eat meat and drink wine.

"How is the hydraulic forging hammer I told you before?"

"Mr. Lang, this..." Chen Jiangtou was a little difficult to speak, and said with a tough forehead: "You said that you should use hydraulic power to forge iron, but it is just that the craftsmen are really difficult to get it out. If it is a trolley, a water pestle, or something, it is the thing of our ancestors, we can't forget it, but it is really difficult to make a hydraulic iron!"
Chapter completed!