Su Yu rarely made a request with him, who was a big brother, Su Yan was full of answers, knowing that Su Yu was in a hurry, and early the next morning, the blacksmith who wanted it had been sent to Su's house, followed by a tool for striking iron, and even several pieces of iron ore.

Su Yu didn't sleep well last night, and now it's blue and black, looking at these hearts, it's so beautiful that it's bubbling, the eldest brother is really good, this is simply a pillow sent by drowsiness.

Soon, with the help of a few subordinates of the Su family, the backyard of the Su family immediately cleaned up an iron room, which was specially used for Su Yu's research.

He took out the blueprints and handed them to the new blacksmith.

"Master Wu, can you see if this thing can be made?"

The new blacksmith's surname is Wu, and he is also a rough man with black skin, which is a good match for the blacksmith's profession.

Master Wu looked at the gear pattern in his hand and was at a loss, what should I do? A round object, surrounded by protrusions all over the place, was really embarrassing for him.

I thought that this time I came over just to fool the little girl, but I didn't expect him to be stumped at the beginning.

It is true that there was no such thing as gears in ancient times, but gears were indispensable to make rice transplanters.

"Master Wu, do you want to find a carpenter to make a mold?"

Master Wu's eyes lit up when he heard this, and he often used a mold to fight swords, dissolved the molten iron and poured it into the mold, how could he forget this.

"It's feasible to make a mold, but wood can't, wood can't withstand the high temperature of molten iron, and old slaves generally use molds made of stone."

"Success, I'll let people do a few molds."

Su Yu took the drawings and planned to find the only stonemason in the village, but he happened to meet Su Lao Er at the door, and wanted to come back to see what his daughter was doing.

"How's the girl? Did you start making a rice transplanter? ”

"It's still early, I'll go find Uncle Shi and ask him to make a few molds for Master Wu."

"You leave this matter to Dad, I'll take the drawings and ask you if Uncle Shi will do it, and if he can do it, I'll call someone to you directly, and you won't go."

After living in Jinjia Village for a long time, the relationship between my father and the people in the village has become better and better.

"Nacheng, I'll go back to Master Wu and have a look."

Su Yu went to the backyard and took it back to her own house, dragged out a sack from under the bed, like this sack was almost piled up under her bed, took out two stones from it, and took one to the backyard with one hand.

This stone was hidden by herself before the officers and soldiers entered Jinjia Village, and she knew that she told the emperor that the stones in the village would definitely be scavenged, and she was afraid that she would use them in the future, so she kept some, but in fact, it was not much, and it was only a few hundred catties under a bed.

If this is seen by the military department, he will definitely blow his beard angrily and stare at it, now a small piece of silica is in the military department, but it can play a big role, and now even silver can't buy it.

After Su Yu left, Master Wu was sorting out the things that moved in early this morning, and many of them hadn't been sorted out yet, but he didn't expect Su Yu to come back so soon.

"Girl."

"Master Wu, my father has already gone to find someone, and someone should arrive in a while, you come and take a look at this drawing."

As he spoke, he casually took the top drawing from the table on the side and handed it to Master Wu.

Master Wu looked at the circle in his hand and didn't know why, I don't know what it was for.

"...... this?"

Su Yu explained: "This is part of what I want to do, I call it a spring, just wrap it around the iron rod before the wire becomes hard, this should not be difficult to do."

Listening to Su Yu's words, Master Wu nodded.

"It's really not that hard, I'll try it later."

Master Wu is also a man of action, and after figuring out the principle and finding a good guy, he began to burn charcoal.

At this time, seeing Cao Zhida passing not far away, Su Yu called someone over.

"Cao Zhi, come over for a moment."

A few days ago, Cao Zhi had been replaced back, and when he heard Su Yu calling him, he immediately put down the work in his hand and walked over.

"Girl."

"These days, leave the task at hand to others, and you will help Master Wu light the fire and pull the bellows."

"Yes, girl."

Cao Zhi took over the work from Master Wu and began to burn charcoal.

He picked up the two stones that had been placed on the table when he came in, and struck a small corner with a small hammer that had been placed beside him.

"Master Wu, melt this small piece of stone when you practice iron later, and drop a few drops in it."

The other Su fish didn't say much.

On the way here, Master Wu has already explained the things he brought here, he only cares about doing things, and doesn't ask anything else. Master Wu always remembered this, so although he was extremely curious about the stone in Su Yu's hand, he couldn't bear to ask.

"Yes, girl."

Su Yu was still thinking about how to explain it, but seeing Master Wu's appearance was a relief, she simply found this person for her by her eldest brother, and her loyalty went without saying.

When Su Lao Er came to Su's house with a stonemason, Master Wu had already made two springs, in fact, it was very simple to make springs, but no one thought of it before, and ordinary iron was used to make springs, which was useless, but now there are no concerns about that, silica is added to the molten iron, and ordinary iron becomes fine iron, and the springs made are incomparable to those made from ordinary iron.

After cooling, Su Yu tried it and thought it should work.

"Girl, I brought you your Uncle Shi, he said he could do this thing."

As soon as Su Yu looked up, he saw his father walking over with a middle-aged man, the man was carrying a basket behind him, and it was a little difficult to walk, thinking that there should be a lot of objects inside.

"I'm tired of Uncle Shi, you run this trip."

"It's not troublesome, it's not troublesome at all, anyway, I don't have anything to do during this time."

Shi Boss didn't lie, now the villagers are busy with spring ploughing, few people come to his house to order stone tools, a year of spring ploughing and autumn harvest, is the most idle time for Shi Boss.

Boss Shi is the eldest in the family, and there are two younger brothers at the bottom, but the two younger brothers did not come back to life when he was very young, and he was the only son in the family, and his parents passed away one after another two years ago, so now the Shi family only has two husband and wife, and there is an unmarried son at the bottom, and Boss Shi's wife Xin also works in the Su family's workshop.

As he spoke, Boss Shi was not idle in his hands, Su Lao Er took a hand, put down the back basket on his back, and pulled out things from the inside, most of which were objects he used to chisel stones, and under the back basket were a few small stones, which seemed to be used to make molds.

"You're busy with your work, I'll do a good job here, if there's anything that won't be changed for me?"

"It's still Uncle Shi's thoughtfulness, so Uncle Shi will be bothered."

Su Lao Er followed his daughter and looked at it, he didn't understand these things, so he went to work on his own.