Datang Institute of Technology

Xu Changsheng and Brother Changbai followed the eldest grandfather and walked towards the West Market.

Brother Changbai was still muttering, "Whose family raised that eagle, next time you see it, you must poke it with a pole."

Xu Changsheng was taken aback for a moment, he really saw an eagle today, didn't the young master of the uncle's house just mentioned one?

……

In the West Market, people from the Xu family were happily selling bean sprouts. They didn't know that this might be their last day of selling bean sprouts in Chang'an.

Today's West Market, today's Chang'an, is a bit different, because a group of children with abacus on their waists are following the uncle selling bean sprouts, doing calculations quickly and accurately.

Formed a beautiful landscape.

Even those who didn't buy bean sprouts gathered around watching with relish and amazed.

Among them was Zu Youming, who was dressed in the uniform of a student from the Imperial College, followed an uncle who was carrying a burden and looked all the way, without taking a single glance away from the abacus in the hands of the kid who was trying to settle the score.

He observed very carefully, no matter how many bean sprouts someone came to buy, the child who was counting the bills only needed to use a rectangular tool and crackle a few times to know how much to charge, very quickly.

He checked them all and found nothing wrong.

He was sure that even the Gongsheng of Guozijian might not be counted accurately with this child.

The bean sprouts in the burden have been sold out, and they began to gather in the West Market.

At first, Zu Youming thought that only this one child was so special, but when he arrived in West Market, he couldn't help being stunned when he saw a group of children with abacus hanging on their waists. These...will all settle accounts?

Looking at the abacus, he fell into thought thoughtfully.

At this time, the great grandfather came back with Xu Changsheng and the two of them, and asked the Master to prepare to return to the village.

Zu Youming hurried forward, cupped his hands and said, "Zu Youming, Gongsheng of the Imperial Academy, just now I saw that the object in your little man's hand seems to be related to arithmetic. It is very interesting. Can you tell me what it is?"

How could a group of uncles selling vegetables know that they looked at each other, but the Gongsheng of the Imperial College actually came to talk to them politely?Immediately he looked proud, thinking, Little Immortal's things are just different.

A child next to him puffed out his chest, extremely arrogant, and said, "This is an abacus."

That movement was exactly like Xu Changsheng's copy.

This is what the little fairy taught them, and no one else knows it.

Zu Youming was stunned for a moment, abacus?He heard that the name should be related to arithmetic, but he couldn't understand it, and asked with interest, "I don't know what the principle of this abacus is?"

How could a child know the principle of abacus, scratched his head, and said after a while, "I don't know, we can use it as the little fairy teaches, anyway, it's easy to use, hmph."

Little Fairy?Who is it again?The abacus was taught by this little fairy?Why did Zu Youming feel more and more confused, and was about to ask.

At this time, the great grandfather stepped forward and said, "This young man, something happened to our Xu family, and we have to leave Chang'an now. If there is anything, can we ask next time?"

After speaking, he greeted people to leave.

Zu Youming looked at the people who left in a hurry, feeling unwilling, but he couldn't hold on to other people's family affairs, and he also inquired, people from Xu's family would come to West Market every three days to sell bean sprouts, You can only wait for the next time to ask.

Thinking of the abacus, the more I think about it, the more amazing it becomes. A half-grown child can calculate so fast and accurately with the help of the abacus.

He went to the East Palace to wait for his grandfather with a full face of excitement, and told him what he had learned today. His grandfather was a Ph.D. in arithmetic from the Imperial Academy, and he was currently discussing that strange arithmetic problem with the Crown Prince in the East Palace.

……

The Xu family's team learned on the way back that they would no longer be able to sell bean sprouts in Chang'an, and they couldn't help but sigh.

But knowing that the three Changsheng people were saved by the method of raw bean sprouts, they felt a little lucky. If they really ate those twenty big boards, Changsheng and the others might not be able to get out of bed in the future.

"It's good that people are fine..." the clan uncles sighed.

Seeing that their Xujia Village was about to become rich, they didn't expect this to happen.

Back in Xujia Village, the villagers sighed after hearing the news, what a good business, it just disappeared.

At the dinner table, Brother Changbai drooped his head, as if he had made some unforgivable mistake.

The uncle was also a little angry, she went to see the chickens, and planned to buy them in the spring, but...

He couldn't help saying, "Changbai, you are such an adult, why don't you bring some longevity, it will only cause trouble. The way to grow bean sprouts is the hope of our whole village."

Uncle Xu Zheng also had a frowning face, and glanced at his aunt, "Why are you talking about this in front of the children, eat your food, at least our village will not have to worry about food for the winter."

Seeing the atmosphere, Xu Changsheng was stunned.

What's the matter?As if we couldn’t survive a good day, he said with a look of contempt, “If we can’t sell bean sprouts, we can sell other things. Anyway, the county magistrate just forbids us to go to Chang’an to sell bean sprouts, and he didn’t say that we are not allowed to sell other things.”

The uncle and uncle were taken aback, and looked over, "What else can we sell?"

Xujia Village has nothing but bean sprouts?

Fish can be caught by digging ice holes, but the number is too small.

Xu Changsheng arrogantly patted his small chest and stood up, "What can I sell? Let me think about it."

Uncle: "..."

Uncle: "..."

Brother Changbai: "..."

This momentum thought he was confident, but in the end...

Can you think of it now?this……

Xu Changsheng looked at the light fried bean sprouts on the table, his eyes moved, "Yes, we can sell oil!"

It just so happens that bean sprouts cannot be sold now, and the remaining soybeans can be used for oil extraction.

Soybean oil is the best.

Datang used all animal oil, and now even people are starving to death, how can they afford to raise poultry, so the price of meat is so high, and the price of oil is naturally expensive.

But soybeans are different. Soybean rice is the staple food of Datang, so it is very common for farmers to grow soybeans.

Once soybean oil is produced, the price will definitely be much cheaper than animal oil. As far as he knows, the oil yield of soybeans can reach about 20%, which means that ten catties of beans can produce about two catties of oil.

The soybean meal left over from oil extraction can also be made into bean cakes. At first Xu Changsheng wanted to say that the soybean meal could be used to feed poultry, but he would be beaten if he said it.

"Selling... selling oil?" Both the uncle and the uncle's mother were startled, "Our village doesn't raise poultry such as pigs and sheep, where can we get the meat to boil and sell?"

Xu Changsheng looked contemptuous, and raised his face, "Who said that only meat can be boiled to make oil, and beans are also fine."

So, the news that the little fairy was going to turn beans into oil caused a sensation in the whole village.

The little fairy said, what does it matter if you can't sell bean sprouts?Selling bean sprouts doesn't make any money, so they will sell oil instead.

Xu Changsheng: "..."

The uncle's house was surrounded by people, and someone was counting on their fingers, "This is the third fairy art of the little fairy."

"The first one is raw bean sprouts, the second one is catching fish, and the third one is bean oil. It's amazing."

too amazing?Xu Changsheng felt that he was too angry. No wonder the children in the village could not stop talking about fairy arts, they all learned them from their mothers.

Superstition, feudalism!Xu Chang stomped his feet angrily, but there was nothing he could do, some things were too deep-rooted, and there was still a long way to go to correct their misconceptions.

Xu Changsheng sighed, now the important thing is to squeeze the oil, he is already tired of the pigskin from his uncle's natal family that is said to have been used for almost half a year, it is scary to think about it.

The uncle borrowed a lot of pots and started frying beans under Xu Changsheng's command.

Xu Changsheng is still too young, not as tall as a stove, so he definitely won't be able to fire.

Saute the beans to dry out the water and stop when the skin becomes a bit oily.

The stone mortar for pounding rice was brought in. Fortunately, there were many people, and the beans were quickly pounded into fine particles.

This method is too labor-intensive, Xu Changsheng thought about it, and asked Uncle Sixteen to make the stone mill out, which would be much more convenient.

But let's just make do with it for now.

The granulated beans were wrapped up in a cloth, and now it was time to extract the oil.

It was inconvenient in ancient times, and there were no smarter tools.

Fortunately, there is a big mountain behind them. The most stupid way is to use big rocks to press the oil. Let's do this first, and improve it in two days.

Let the clan uncles go to the mountains to find big and heavy boulders.

Then put the crushed beans wrapped in cloth on a flat stone with notches for oil leakage, and then press the big stone found in the mountain on the beans.

Xu Changsheng found a bowl and put it under the slot, then looked up at the "mountain" that was higher than him.

The clan uncles are really honest, let me find a big stone, this stone is really big enough.

"Is that all right?" The great grandfather was also alarmed and rushed over to see.

Xu Changsheng nodded, don't look at a small bean, it's very greasy.

In fact, there are many beans and plants that can also extract oil, but why are soybeans used the most?It's not because it produces a lot of oil.

"Tick!"

"It's... oily!"

When the first drop of oil dripped from the slot, the people in Xujia Village almost went crazy with excitement.

This is oil!They used to always use pork rinds!

Today, when they learned that they would not be able to sell bean sprouts in the future, the heavy blow almost made them breathless. Unexpectedly, the turning point came so quickly.

The people in Xujia Village guarded the oil extraction place, they didn't even sleep at night, they couldn't bear to blink their eyes, even the great grandfather was like this, he couldn't control his excitement.

Seeing bowls of oil being squeezed out, smelling the unique smell of soybean oil, I couldn't control my expression. I looked at a thatched cottage next to me. There are really little immortals living there.

At this time, Xu Changsheng was painting a stone mill, and he was going to ask Uncle Sixteen to build it. In the future, grinding beans would not be so troublesome with a stone mortar for each person and a big stick.

After painting these, Xu Changsheng couldn't sleep, maybe too many things happened today.

He couldn't help picking up the pen, he had to talk to someone about so many things.

"Brother Gao Ming, I almost got spanked today, twenty big boards, isn't it scary? Because I burned down the yamen in Chang'an today..."

Xu Changsheng wrote it stroke by stroke.

"Fortunately, the great grandfather handed over our method of growing bean sprouts to the imperial court, so the three of us were not punished."

"The laws of the Tang Dynasty are really unfair. Our method of growing bean sprouts does not consume a bit of arable land. In three days, one catty of beans can be turned into five catties of bean sprouts, and dozens of boards are replaced... The county magistrate still doesn't allow us to do it in the future. Sell ​​bean sprouts."

Noisily wrote a big tweet.

At the end, he wrote, "Brother Gao Ming, you haven't solved that problem yet. I've been waiting too long for a big problem."

At this moment, the members of the Cui family were also pretending to go in and out of Chang'an City frequently. They were creating the illusion that they were studying the method of bean sprouts. When things matured, it was time for them to submit the method of growing bean sprouts to the court.