What is called Ino Spear Nina Island, and then Kagoshima, these places are not even clear to Han Yanxuan, let alone Wu Song.

Han Jiang explained: "Daddy, what is finance, let me give you a simple example. Dad went to the Qinglou to drink, took the money and paid for the wine, which is called consumption. But my father drank in the Qinglou, and it was me who paid the money, and my father had to pay me back at the end of the month plus a little interest, and I settled with the Qinglou once a month, which is called finance. ”

Han Yanxuan felt that his IQ had been challenged, and he couldn't understand it at all.

Han Jiang changed the way of explanation: "Then change the way, Daddy, I circled a piece of land and built hundreds of houses." Someone came to buy a house, but he didn't have enough money. I asked him to pay 20% first, and then 10% per annum. ”

Wu Song shouted: ", as an adult, you are not stupid." ”

Han Yanxuan stopped Wu Song: "Let Brother Jiang finish." ”

Han Jiang continued: "The money for building a house, in fact, I have recovered half of the cost of these two percent, and then eighty percent, calculated at an annual interest rate of one percent, will double the total price in ten years." I asked them to pay the money on a monthly basis, if they can't pay it back, the house is still mine, if they can pay it back, I have money to collect every month, this is called finance. ”

Wu Song still said: "As soon as you are an adult, you want to be a good person?" Foolish. ”

Han Yanxuan also said: "It's really stupid, the current situation is to lend 50,000 yuan with a monthly interest of 4,000 yuan." ”

Han Jiang just smiled and didn't explain.

That's right, the Song Dynasty did have high interest, up to 100 percent, and lamb interest.

Although Han Yanxuan is a traitor, since he admits that Han Jiang is his son, even if Han Jiang's ideas are strange, he still supports it. If the final result is wrong, he is confident that he can finish up for Han Jiang.

Han Yanxuan said: "In this way, take out a piece of the land at home in Lin'an Mansion and give it to you." ”

"Just give me 10 million dollars, and I'll go collect the land myself."

"Okay, 10,000,000,000 dollars, it's not a thing."

It's only 10 million dollars, and Han Yanxuan, who calculates the amount of money in 100 million, really didn't pay attention to it.

In the Han family's basement, there are hundreds of silver balls with a diameter of one foot, and there are more than a dozen gold balls. Take out a golden ball, it must be worth 10 million dollars.

Han Jiang asked again: "Daddy, how is the coal mine in Yanzhou?" ”

"Peace of mind, there is a small mine, at most ten days, under the heavy reward of my father, the prospectors of the Ministry of Industry will definitely be able to find a big mine."

"Daddy, I saw in the book in Yanzhou, we have a plaster shop? And a lime mill? ”

"Yes, indeed."

Han Jiang asked again: "Is there any soil in Yanzhou that can burn kiln bricks?" ”

"Yes, there are countless in the mountains, and they stopped twenty years ago, because the kiln bricks in other places are better, the states south of Jiangnan East Road are better, and the waterway is convenient, so it stopped."

As soon as Han Yanxuan explained this, Han Jiang understood. That place is already close to the east of Jiangxi, which is definitely better than Yanzhou, and because of the good materials, Jiangxi's porcelain is much better than Liangzhe.

"Daddy, the Ministry of Industry lent me two people with high skills, but they are not reused. I want to build a house that no one in the world has ever seen, and I still need 500,000 catties of iron. ”

"No problem, the ordnance prison has 20 million catties of iron, and it is not a problem for them to pour out a million catties."

Han Yanxuan didn't even ask Han Jiang what he wanted Tie for.

The next day, the twenty-seventh day of the lunar month.

The entire Lin'an Mansion is preparing for the New Year, and there are 30 strong laborers in the Han Mansion alone, and there are dozens of excellent blacksmiths, leadsmiths, and coppersmiths in the Wu and Han Mansions, plus small workers who do odd jobs, as well as those who are brought out of prison and have iron chains and privately minted coins waiting to be exiled, totaling hundreds of people.

The furnace was burning very strongly, and the craftsmen took out their ability to press the bottom of the box.

The blacksmith's task is to make a super-hard iron model, that is, cast iron with plating, the original alloy mold. Han Jiang's request is to make only four, and the words on the mold are sent by Han Jiang to Qianfu to beg, and only two words are asked, Shengshi.

The word Tongbao is chosen on a Tang coin, and people who understand it say that this is Yu Shinan's word.

The task of the leadsmith is actually not difficult, to separate another substance from the ore, and to refine the zinc separately from the lead-zinc ore.

Han Jiang drew a simple diagram on paper.

"This is a kind of clay pot, calamine and charcoal are burned in it, and there is a metal in the ore used to make gold in the past, if there is a record, it should be called white lead, or white tin, and I call this thing zinc. The leadsmith figured out a way to solve it, and the rest of the helpers. ”

Han Jiang studied economics, and coinage in ancient times was one of his professional courses.

At the earliest, there was tin copper in the Qin Dynasty, and later in the Tang and Song dynasties, lead and copper were the mainstream, and after the Ming Dynasty, there was brass.

Tomorrow, there will be a refining method for zinc in Gongtianwu, the condensation method.

A leadsmith said: "Shaojun's method is good, the little one has tried to separate white lead before, when my master was alive, he used a tong pot to smelt lead, and some white tin would stick to the iron cover, but it was poisonous and died." Besides, white lead is of little use, plus poison kills people, so there is no one to refine it. This craft has been passed down by my master. ”

Han Jiang has always believed that there was this kind of technology in the Ming Dynasty, who wants to be a craftsman, this metal is useless, someone will refine it a hundred years ago, it is just a inherited technology, but not many people use it.

There will be deaths, and that should be lead-zinc ore, and lead is poisonous.

After listening to this explanation, Han Jiang said in his heart that it might be that the Tiangong Kaiwu of the Ming Dynasty just recorded a better technology, and the original technology had long been there.

In fact, historical research shows that the Song Dynasty was able to refine zinc alone when refining lead in the tenth century, and the cost was not high, because it did not find the value of use, so there was no large-scale workshop.

The leadsmith said, "I know that at first we wanted to smelt silver from the lead mines, and some of the lead mines had silver, while others did not. ”

"Understood, try what I said first."

"Yes."

The leadsmith is still sure, calamine is not as good as lead-zinc ore, and this thing is at least not poisonous when burned.

Next came the coppersmiths, who were responsible for refining the purest copper possible from the copper ore, and when the zinc had been refined, they would start from 40 percent to 60 percent of the zinc and copper, with a difference of 0.3 percent, to make 30 alloys in different proportions.

Why not use the copper now.

The copper in the house is either added with lead or tin, and few families will have pure copper at home.

In the end, those who minted the private money were responsible for completing the final mold.

Those who were brought out of prison sold their lives to Han Jiang with two bowls of mutton per person.

I thought I was going to die, but now I have meat to eat, and there is a Han family member holding a knife on their necks behind them, who can not sell their lives.

Handmade.

Relying on a sledgehammer to complete the final forging and stamping process, the red-hot copper-zinc alloy is placed in the cast iron mold, covered, and the powerful blacksmith goes down with a hammer to finish.