Datang Institute of Technology

A hole was punched at some distance in the river.

Keep a hole for every few children to prevent it from freezing.

From time to time, the children exclaimed, because a fish jumped out of the hole by itself, and ran towards the hole where the fish jumped. It was obvious that they had seen it more than once, and they were very excited.

They ran back quickly, because the hole they were guarding was also jumping fish out.

Xu Changsheng held a stick in his hand, as long as anyone was so excited that he couldn't help calling Xianshu, he would chase after him with the stick and beat him.

Let you not improve your memory, I have said that it is not a fairy art.

Menacing, vicious.

The person who was beaten didn't mind, he turned around and ran away laughing, still muttering in his heart, the fish jumped up by itself, and said it was not a fairy art?

After everyone got a fish and it was getting late, a group of children rushed into the village.

Everyone is holding a fish with excitement on their faces.

Xu Changsheng hugged two of them, but couldn't move his hands, because Dabai also got one, quack.

Brother Changbai rolled his eyes with a smile, because his one is so big.

A group of children hugged the fish and entered the village, causing quite a stir.

"In such a cold day, the surface of the water is frozen, where did you catch the fish?"

The child's chest puffed up, "Changsheng taught us to use immortal techniques to catch it."

Before he finished speaking, he saw a white and fat figure rushing fiercely with a stick.

Terrified, they scattered and went back to their respective homes.

In a short time, the story of the little fairy teaching the village children to catch fish spread throughout the village.

This is another fairy trick after raw bean sprouts.

That night, the whole village was filled with the smell of fish.

Many families wept with joy. Not only did they have enough to eat, but there was meat on the table. They were starving to death a few days ago.

Looking at the place where Xu Changsheng lived in a daze, the Changsheng of Erfang's family is really the lucky star of their village, a little fairy who walked out of the mountains, whoever dares to deny it, who are they in a hurry with.

At the uncle's natal family, Xu Changsheng and Brother Changbai each had a big bowl of fish in front of them.

Brother Changbai laughed until his eyes rolled.

Xu Changsheng raised his mouth, because the fish soup was fresh, even if there was a little less oil and salt, he always felt that the fishy smell was strong.

Xu Changsheng also watched his uncle cook.

Oil is actually a piece of pigskin that has been used many times. When cooking, just wipe the pigskin into the pot. Ordinary people are like this, and only rich people can afford to use the boiled oil.

It's scary to think that a piece of pigskin can last half a year for a poor family.

As for salt, it is actually salt stone, which tastes a bit bitter, and I dare not use it too much, because if I use too much, my body will have strange symptoms, but I can't use it. If I don't eat salt, my whole body will be weak. Symptoms are due to poisoning, and the bitter taste of salt stone is due to harmful minerals.

Datang also has coarse salt and fine salt, but it is too expensive, and Xujia Village can't afford it.

Xu Changsheng pursed his mouth and ate the fish. He didn't know what he was thinking, his eyes flickered. He didn't want to live a life without oil and poisonous salt.

……

The next day, Xu Changsheng got out from under the big white fur in a daze.

There was a strange sound outside the door.

"The sky and the earth are yellow, the universe is prehistoric..."

Isn't this a thousand-character text?In ancient times, it was often used for enlightenment.

He ran to push the door open a small crack, and the cold wind rushed in, making him shiver, but he saw a scene that surprised him.

In the heavy snow and the howling wind, a thin old man was pacing back and forth with a ruler. In front of him stood a group of children whose ears were red from the cold. They were of different sizes, ranging from five to six years old to eleven or twelve years old. Brother Changbai stood at the front.

A group of children are shaking their heads and singing the thousand-character prose, which has a peculiar charm.

This is when the cold wind is howling and the snow is flying!

It's nothing more than chiseling the wall to make light, and the head is suspended from the beam and the awl is pierced into the buttocks, right?

Grandfather Xu Wenyuan was still lecturing, "I don't expect you to pass the imperial examinations for high school, but you should read well. As a descendant of the Xu family, you must know a few words and do simple arithmetic. Last time, we went to the city to sell bean sprouts. , because of ignorance and ignorance, I was cheated by others for 200 Wen without knowing it..."

It seems that the great grandfather has a deep resentment for being cheated of money last time, and he used it as a negative teaching material.

In the past, the village couldn't even eat enough to eat, so they didn't want to study. Now that the life in Xujia Village is getting better, the great grandfather thought that it's time for the juniors to learn a few words.

Grandfather also has a plan. Other families have private schools to enlighten children. Their Xu family's conditions are a little better now, and private schools can't be left behind.

After memorizing the thousand-character essay, the great grandfather started teaching arithmetic again. Last time he was cheated out of money and still smiled. He was really impressed.

Xu Changsheng felt a headache watching his eldest grandfather teach a group of children arithmetic.

Can you not have a headache?Now there are no Arabic numerals, such as one plus one, which have to be written in very complicated characters, not to mention calculations, it takes a long time to just read the characters, let alone complicated accounts, which are just lumps of characters. , How can this make people concentrate on calculations?

This is also a major reason why Mathematics originated very early in Tangtang China, but it failed to develop. The basics are so complicated, how can it develop?

The great grandfather was not good at arithmetic, so he was anxious to teach him.

Xu Changsheng, a Ph.D. in physics, a majestic science student, couldn't stand it any longer. He was simply misleading his disciples. His little head stuck out from the crack of the door, "Grandfather, arithmetic is not like this..."

Sweeping eyes looked over.

If someone else said that, the dignified Confucian would probably turn his face against him, but when he saw that it was Xu Changsheng, his face that was about to darken became kind, "It's Changsheng..."

He couldn't help thinking that when he sold bean sprouts last time, Xu Changsheng saw the wrong account at a glance.

His eyes couldn't help but move, "The weather is so cold, Changsheng, come and help the great grandfather teach them first, I'll go to the house for a while."

A group of children: We are also cold.

Xu Changsheng ran out in a panic.

As soon as he went out, it was so cold, he ran into the house again and pulled Dabai out.

So, in the heavy snow, a big tiger lay down in front of a group of children, and a small head was exposed under the big tiger.

Why do you feel the picture is so weird?

Xu Changsheng didn't care, it was warm like this.

Teaching must start from the very basics.

So let's start with Arabic numerals.

Using branches to draw simple symbols on the snow, these symbols are much easier to remember than the original complex characters.

For the next few days, Xu Changsheng taught such simple things. Of course, there was also a ballad, "Four to six to one..."

These children don't understand what it means, so they think it's fluent. Children are like this. If you let them study hard, they may not be able to learn well, but if you let them sing together, the learning speed is very fast.

After a few days, the children in the village could hear their singing wherever they passed by.

The adults in the village didn't understand either, but when they heard it was taught by Xu Changsheng, smiles appeared on their faces. Who is Changsheng?

Grandfather Xu Wenyuan didn't understand either, but seeing Xu Changsheng's confident appearance, he let him go. No matter how you say it, it's impossible to learn some strange symbols, and he was taught to fail when he sang a song. Teaching the children in the clan to read and write, and math was completely left to Xu Changsheng.

It's not that Xu Changsheng didn't do other things these days, no, he was running to his great grandfather, and asked mysteriously, "Grandfather, is there a carpenter in our village? I'm going to make an object."

"Your Sixteenth Uncle is the best carpenter in the village. He used to work in the Ministry of Works, but he quit after something happened. His skills are no worse than those in the Ministry of Works."

Uncle Sixteen?

Xu Changsheng was a little dizzy. There were so many relatives that he couldn't remember them all.

He followed his grandfather to Uncle Sixteen, and he also knew what happened to Uncle Sixteen that his grandfather said had retired from the Ministry of Industry.

Uncle Sixteen's left hand is gone, just an empty sleeve.

"Changsheng, don't look at you like Uncle Sixteen, all the tools in our village are made by him."

Uncle Sixteen was also very enthusiastic, "Changsheng, just ask what you want to make, and Uncle Sixteen promises to make it for you..."

Xu Changsheng's eyes lit up, so the two of them started talking to each other and drew some weird things on the paper.

"What is this?" Uncle Sixteen looked at the final pattern on the paper, which was a rectangular frame with beads strung inside, and asked in confusion.

Xu Changsheng laughed until his eyes closed, "This is an abacus, used for arithmetic, Uncle Sixteen, can you make it?"

Uncle Sixteen was taken aback, arithmetic?Really strange tool.

But he smiled immediately, "It takes some time to polish the beads, but other crafts are not difficult."

Xu Changsheng laughed out loud, as long as he can do it.

The craftsmanship is indeed not complicated, the beads are made of wooden beads, and the frame is even simpler.

The mountains behind are full of trees, and there is no shortage of materials.

Within a few days, a group of children each got an abacus.

Everyone hangs an abacus on their waist, which looks quite interesting, and makes a unique "swishing" sound when walking.

People in the clan thought it was a small toy.

small toy?

Xu Changsheng was unhappy.

So, God mysteriously gathered these relatives together.

"What's the matter?" The great grandfather also came, thinking that something happened.

Xu Changsheng raised his chest, "Grandfather, next time you go to Chang'an City to sell bean sprouts, take them with you, they can help you settle the score."

Help settle accounts?

There was a moment of silence first, and then an uproar. How long did it take for them not to know what their own children were like?Can it be settled?

The great grandfather was also surprised. He still vividly remembered the hardships he had in learning arithmetic.

But looking at Xu Changsheng's appearance, it doesn't look like a fake, and this matter can't be faked.

The great grandfather said, "I'll test them first."

……

As for the result, one can tell from the shocked expression on the grandfather's face. When did he learn the complicated arithmetic so quickly?

The parents watching were blushing with excitement, looking at the abacus hanging on the waist of a group of children, listening to the sound of walking, it was like hearing Xianle, their children would actually settle accounts...!

Uncle Sixteen was also surprised that the little thing he made had such a great use.

This is an unprecedented tool!

The little fairy is really amazing!