Survival skills maxed out, I feed my wife and daughter by catching fish and shrimp

"I heard you're good at numerology, why not let me test you?"

"Master Chen, please feel free to speak." Shen Wanwu straightened his back slightly, with a hint of pride in his eyes.

This numerology is the skill that Shen Wanwu is best at. It was with his extraordinary talent in numerology that he earned such a huge fortune. If the last batch of goods had not been looted by the damn bandits, his wealth would have reached a higher level.

"First question! There are pheasants and rabbits in a cage. There are thirty-five pheasants and rabbits on top and ninety-four legs on the bottom. How many pheasants and rabbits are there?"

Chen Changfan stated the question with a smile. When Shen Wanwu heard it at first, he thought it should not be a difficult question.

But after thinking about it carefully, he found that this question contained a mystery. He calculated silently in his head and quickly came up with several answers, but still could not figure out the idea of ​​solving the problem.

"You can do it with pencil and paper."

Seeing that Shen Wanwu's expression was becoming more and more solemn, Chen Changfan smiled and pointed at the paper and pen on the table and said.

Shen Wanwu kept calculating on paper, filling up a whole sheet of paper, but still couldn't find the right method.

This question seems not difficult, but it always makes people feel confused.

He was so anxious that sweat broke out on his forehead, but he still couldn't figure out the answer.

"Sir, this problem... I can't solve it."

Shen Wanwu felt a little embarrassed, but Chen Changfan smiled and waved his hand, then picked up the pen and wrote down two equations on the paper.

X+y=35

2x + 4y = 94

Chen Changfan explained the symbols in the equation one by one, "Try to calculate it and see if you can figure it out?"

Shen Wanwu nodded seriously, picked up the pen and drew on the paper, finally he suddenly realized it and quickly calculated the result.

"Sir, what kind of magic is this? Why have I never heard of it?" Shen Wanwu showed an expression eager to learn.

"This is called a system of linear equations in two variables. It's very simple. If you want to learn, I can teach you."

"Sir! I want to learn! Please teach me. I heard you are going to set up a market, and I can work for you!"

Shen Wanwu looked at the simple formula, which looked like a work of art. He always thought that numerology should be simple and beautiful, but the numerology methods he mastered were too complicated. Now he knew that the real numerology was like this.

"Sir, I also want to learn this magic!"

"Sir, I also want to learn..."

Tang Shao and Shopkeeper Fu also showed expressions of great interest. Whether it was making water wheels or running a business, they could not do without numerology. However, the numerology they currently mastered was too simple. It was okay for doing some simple things, but they were a little stretched when encountering difficult problems.

Chen Changfan looked at the three people, a hint of cunning flashing in his eyes.

He called them over specifically with the intention of introducing the three of them to numerology. After all, the villa would depend on them to build it in the future, and it would not be possible without sufficient mathematical foundation.

"From now on, the three of you will learn numerology from me."

"Thank you, sir!" the three said in unison.

……

The sun is setting.

According to the drawings given by Chen Changfan, bricklayer Hu carefully completed the sand mold and finally breathed a sigh of relief.

"Boss, why do we need to build such a large iron furnace?"

Bricklayer Hu wiped the sweat from his forehead and couldn't help but ask curiously.

According to the boss's design, this iron furnace is more than three meters high. If the casting is to be completed, I don't know how much pig iron will be consumed.

"What do you know? I want to build the Taishang Laojun's alchemy furnace, so of course it has to be bigger."

Chen Changfan said half-jokingly.

In fact, this huge furnace has both heating and steelmaking functions, and it is not an exaggeration to say that it is the alchemy furnace of Taishang Laojun.

laugh--

The three furnace mouths opened at the same time, and the hot molten iron poured out.

Under the operation of the workers, the liquid was poured into the sand mold quickly, and only then was one of the molds filled up.

After pouring six more molds, the process was finally completed. When the sand molds had cooled sufficiently, Hu the bricklayer ordered people to open the sand molds. With the polishing of an iron brush, the six key components of the furnace were revealed.

"Boss, the quality of the finished product this time is quite good. It seems that the quality of our pig iron and mold making level are barely up to standard."

Looking at these heavy castings, Hu the bricklayer said with some excitement.

After checking the quality of the casting, Chen Changfan also smiled.

The key castings of the furnace were completed so quickly, and this progress really exceeded his expectations.

Never underestimate the craftsmen of every era.

Their manufacturing processes are often limited by knowledge constraints. If modern production knowledge is popularized, it may be possible to trigger an industrial revolution.

With the key components in place, the rest of the furnace is ready, and the next step is the assembly process.

This process is not difficult for Hu the bricklayer. Assembling the furnace is actually similar to building a house, or even simpler.

That night, a brand new tall furnace was completed in the center of Zhuangzi.

Then, under the gaze of everyone in the village, the furnace was lit and ignited, making a beast-like roar.

Hundreds of kilograms of ore were filled into it at once. The bellows, pulled by four strong men together, made a whistling sound, and a terrifying heat flow immediately spread out in all directions with the furnace as the center.

"Hoo! The furnace is finally finished! We can smelt more iron from now on!"

"The furnace is so warm that I don't feel cold anymore."

"I heard from Lord Chen that the furnace can also be used for heating, making the temperature in the house as warm as spring."

Chen Changfan ignored the discussions of the crowd and watched the iron-making process in the furnace nervously.

With the orderly cooperation of the workers, the reactants were continuously put into the furnace, the bellows were constantly blowing, and the workers sometimes discharged the slag and sometimes adjusted the fire temperature.

An hour later, a furnace of molten iron was poured into the mold, and a square iron ingot gradually took shape.

"Boss, this piece of pig iron weighs 50 kilograms. Even if it's refined into wrought iron, it will weigh kilograms!"

Blacksmith Han said excitedly, looking at the iron ingot as if he saw gold.

Such a large iron ingot can indeed be exchanged for gold, but even if it is gold, Chen Changfan is reluctant to exchange it.

Iron was also a scarce material in ancient times. If the imperial court knew that he was smelting iron privately, they might send troops to suppress him first.

"Boss, now that we have the big furnace, we should have enough iron, right? Can you ask Han the blacksmith to make ten shields for our village guards?"

Old Wei stared at the big iron ingot with shining eyes and said enviously.

"Boss, our bandit suppression team is in urgent need of spears. Could you make us twenty spears this time?"

Zhang Yi also stared at the iron ingot.

"Boss, the shield is good. The shield can protect the house!"

"Boss, make a spear. This thing is sticky with shit. Whoever you poke with it will die!"

Seeing the two arguing over what to build first, Chen Changfan was speechless.

It's just an iron ingot. Look at what you two have accomplished.

Even though we now have a melting pot, the production capacity has only just been increased. It is not an easy task to meet all the needs of all parties in the short term.

Protecting the village, suppressing bandits, hunting, heating, it can be said that every aspect is inseparable from iron smelting.

If the production capacity is sufficient, Chen Changfan even wants to build a steel fortress. In that case, not to mention hail, even falling knives can withstand several rounds.

"Stop arguing. I've already told Shen Wanwu about the distribution of resources in the village. If you want to know how many shields and spears you can get, go to Shen Wanwu."

Chen Changfan was too lazy to sort out these clues. He had too many clues on his hands now. He just needed to point out the general direction and leave the rest to his subordinates.

After a tiring day, Chen Changfan returned to the cave and found Shen Cuiyun altering Luoluo's clothes.

The little guy is growing too fast, and the cotton-padded jacket Shen Cuiyun made before is a little small. Now it has been altered and she is refilling the cotton.

Chen Changfan grabbed a handful of cotton and found that the cotton did not seem to be fluffy at all, and looked gray, far inferior to the high-quality long-staple cotton produced domestically in his previous life.

When he thought of his own daughter wearing such a cotton-padded coat, he was really afraid that the little one would catch a cold.

After all, the power of the Little Ice Age has begun to show, and this winter will definitely be extremely cold.

"This cotton is of average quality. How about changing it to something else?"

Shen Cuiyun was immediately delighted when she heard her husband's words. "This is already the best cotton you can buy in Qingshan County. Many people can't afford such good cotton even if they have money!"

"Take out the cotton first. I'll find you something warmer than cotton."

Chen Changfan said this and went out, and Shen Cuiyun looked surprised.

Is there anything in the world warmer than cotton?

Shen Cuiyun simply put down the needle and thread in her hand, held Luoluo and stood at the entrance of the cave looking out.

After a while, Chen Changfan took a dozen wild ducks and picked up a comb. He kept combing the ducks' bellies, and soon a cloud of duck down was combed out.

Repeating the previous operation, the down of more than a dozen ducks was quickly removed. These wild ducks are clean by nature, and their down is very clean, so the cleaning and drying process is saved.

After putting the duck down into the bag, Chen Changfan excitedly went to find Shen Cuiyun, leaving the ducks lying in a mess on the ground.

"Erlang, what is this? It feels so light and soft, fluffier than cotton!"

Shen Cuiyun pinched the smooth and soft duck down and could already imagine how warm it would be to wear it.

"This is duck down. Give me the needle and thread. I want to make a down jacket for our daughter. I'll collect some more duck down in a few days and make one for you too."

Chen Changfan filled the duck down skillfully, picked up the needle and thread, and began to sew with quick movements.

Making down jackets requires extremely high skills from the tailor, but Chen Changfan has perfect tailoring skills, so making a down jacket for a child is not a problem.