The lively ink art exhibition ended, and Chang'an City quietly returned to calm.

However, the ancient well without waves in Guanzhong has quietly appeared a little bit of change, Quyuan plough in the Guanzhong area to show its style, its convenient, fast and labor-saving ploughing effect is good, and soon conquered countless farmers.

In this era when land is the most valuable wealth, people may be frugal, but for the convenience of farming but unusually generous, three hundred Wen said that it is not expensive, but reclaim a few more acres of wasteland, all the capital can be earned back in a year, even the most stingy miser, but also in agriculture willing to spend blood.

Not to mention the Quyuan plough in Mojia Village, there is a seven-day refund and three-year warranty policy.

In an ordinary peasant household in the Guanzhong area, men work in the fields early in the morning with oxen and ziyuan plows, while women play with the chicks they just bought at home.

The weather is still very cold now, and in normal times, these chicks are tightly covered in the house, and only at noon when the weather is sunny go out to breathe in the wind and bask in the sun.

This year, the family has reclaimed ten acres of wasteland, raised twenty chickens, and the hens kept to lay eggs, and in the summer the roosters were sold for money, and then a batch of chicks were bought, waiting for the New Year's delicious meat, thinking of their own life, the life of the family seemed to be getting better and better, and the women's eyes narrowed to the crescent.

During the re-absence of Guozijian, a large-scale renovation was carried out, and the blackboard and chalk entered the highest university in the Tang Dynasty in a grand manner, and the response was good, no matter how Dr. Guozi had opinions on Morton, but he was full of praise for the blackboard chalk.

Guozijian is the vane of education in Chang'an City, and all of a sudden, private schools of all sizes in Chang'an City have ordered blackboards and chalk from Mojia Village, and the construction team of Mojia Village is simply too busy.

"There are nine numbers in the Zhou metric system, and the flow of nine numbers is the "Nine Chapters"!" Shen Hongcai, a doctor of arithmetic, picked up the chalk and wrote the content of the nine chapters of arithmetic on the blackboard, and Merton was surprised to find that Shen Hongcai had carefully separated the nine chapters of arithmetic with various punctuation marks, and the semantic expression was extremely clear.

After the night and day of the study of the national eunuch, a new punctuation mark was finally introduced, although it was not much different from the punctuation marks of later generations, but Merton did not stimulate them again, but silently changed his own symbols.

The young students happily accepted this trendy symbol, which was simple and clear, and clear at a glance, but the promotion among the doctoral assistants of Guozijian was not so smooth, and many elderly doctors of Guozijian still refused to use punctuation, and still made long-winded speeches, which made the students miserable.

However, arithmetic is an accurate science, and it is reasonable for Shen Hongcai to take the lead in using punctuation marks in order to improve the accuracy of mathematics and avoid ambiguity.

"Chapter 9 arithmetic is the most important one in arithmetic, everyone must be proficient, if the final big test, don't blame the old man for being unreasonable!" Shen Hongcai snorted coldly, his eyes sharp.

Since Li Shimin ordered that Guozijian must take the arithmetic exam after his birthday, arithmetic has suddenly become an important subject related to the future of Guozijian's students, and Shen Hongcai swept away his previous grievances and greatly increased his power.

"Now let's start acting!" Shen Hongcai wrote a few questions on the blackboard, and his eyes drifted to the prisoner.

Suddenly everyone wailed! Everyone's eyes were on Merton.

Merton touched his nose in embarrassment, this was not his idea, but Shen Hongcai's own invention.

Since using the blackboard, I suddenly have no teacher and realized the most commonly used trick by thousands of teachers in later generations, acting on the board.

A few arithmetic questions were written on the blackboard, and after a group of students finished writing, they would change to the next batch, if it wasn't for the fact that time didn't allow, Shen Hong couldn't wait to pull everyone up and perform them one by one.

Once that student writes wrong, the consequences will be very serious, and it is estimated that in the next big week, your name will be on every board.

Of course, except for Zu Mingjun and Merton, no matter how high these two perverts raised their hands, Shen Hongcai didn't even look at them. Zu Mingjun said that every time a student made a lot of mistakes, Shen Hongcai would pull him forward to save the scene.

As for Merton's arithmetic level, Shen Hongcai felt that his level was not necessarily comparable to him, so he didn't take the risk of embarrassing himself.

"Kong Huisuo!" Shen Hongcai began to roll call.

Kong Huisuo sighed, his arithmetic level is not good, he has missed it a few times before, and sure enough, this time Shen Hongcai still did not let him go, and the appointed person stepped forward to pick up the chalk and start the calculation, hoping that this time he could pass the test smoothly.

Shen Hongcai clicked the names of the two people, and suddenly found that a hand was raised high.

"Qin Huaiyu!" Shen Hongcai looked at the high hand in surprise, signaling that it was the usual errand student Qin Huaiyu who was going to play the board.

"This guy is really dead, he is in the limelight at this time!" Many people were in an uproar, who didn't know Qin Huaiyu's level, if he could do it, he wouldn't believe it if he killed them.

"Are you sure?" Shen Hongcai's face was a little gloomy, and he felt that Qin Huaiyu was making trouble for him.

"I'm sure!" Qin Huaiyu said proudly, Sao Bao's contempt glanced at the class, this kind of trivial question is a trivial matter if Merton's pervert is closed.

Morton looked at Qin Huaiyu's sassy appearance, and couldn't help but feel a headache, this guy was in the limelight again.

Seeing Qin Huaiyu's repeated insistence, Shen Hongcai let him go up.

Qin Huaiyu deliberately stood by Kong Huisuo's side, and Kong Huisuo couldn't help but gloat when he saw Qin Huaiyu standing beside him.

Qin Huaiyu's level he knows clearly, he is not good at arithmetic, and Qin Huaiyu is not good at all, and even worse than him in arithmetic. This time he had another companion.

However, what surprised her was that after Qin Huaiyu came up, she picked up the chalk and kept brushing. Kong Huisuo looked over curiously, but Qin Huaiyu deliberately covered it and didn't let him look at it.

"Hmph, pretending to be a ghost."

Kong Huisuo snorted coldly, he didn't believe that Qin Huaiyu could do it.

To his surprise, it was only a moment. Qin Huaiyu wrote out the answer with a brush, threw the chalk in his hand, and went down.

And he was done. Kong Huisuo stared blankly at the clearing next to him. Wrong! Kong Huisuo was expecting Shen Hongcai to announce that the answer was wrong, but the shock in Shen Hongcai's heart was greater than him, because the answer written by Qin Huaiyu turned out to be completely correct.

"Well, classmate Qin has made great progress recently, everyone should learn from him." Shen Hongcai praised dryly, "There is another question below, which classmate is willing to come up and do it." ”

Cheng Chu Muteng stood up suddenly, rushed to the blackboard, brushed three times and divided five by two, and wrote the correct answer.

"No, it won't!" Many Guozi prisoners screamed, and even Cheng Chumo, a guy with five big and three coarse, would.

Immediately afterwards, Yu Chi Baolin made an arithmetic problem that stumped Kong Huisuo, which refreshed everyone's three views.

What's wrong with the world?

Everyone found that the poor student who had been at the end of the crane in the class actually counterattacked!

Even more sad is Kong Huisuo, who found that he had always been excellent and became the worst student in arithmetic.