After Wei Kai and Aoi moved into Ying Zhong's residence, Ying Zhong would visit Wei Kai every day to discuss academics with Wei Kai. As for the rest of his spare time, Wei Kai hurriedly began to practice the art of killing, but he also kept splitting the sword.

"You fool, what's the use of practicing this every day?" When Wei Kai, who was practicing swords, heard this, he didn't want to talk to the person who was talking, and continued to practice swinging his sword. "Why are you dumb now, you idiot?" , I saw that the person next to him saw Wei Kai ignoring him, and immediately stood up angrily, pointed at Wei Kai and said.

Wei Kai looked at a little girl in front of him who was slightly older than himself, and his heart was speechless. Wei Kai could only say again and again: "What you said is right." After saying that, he sighed and went back to his small courtyard.

The girl who had been talking next to her just now was named Ran. She is Jing Jian's younger sister, and usually Ying Zhong and Jing Jian have been working in the Qin State Mansion, so she has been staying alone in Ying Zhong Mansion. Because of her young age, Jing Jian and Ying Zhong love her very much, so they become the little overlord of Ying Zhong's mansion. Unfortunately, Wei Kai had just moved into Yingzhong's Mansion and accidentally offended her, and then things developed like this.

At this time, after Aoi appeared with tea, Ran jumped up and ran to Aoi's side and said, "Sister Aoi, that wood knows how to practice swords every day." When Aoi heard this, she smiled and said, "Don't be angry with my brother. This is the dessert I made, you can try it. See if it's delicious? ”

When Ran saw the dessert that Aoi handed over, he immediately ate one and said, "It's delicious." Sister Aoi, let's eat them quickly, okay? and don't give that wood to eat".

Aoi smiled when she heard this, and said, "Have you forgotten what happened to you last time?" ”。 Ran thought about it, remembered the last time he ate too much and ended up with a stomachache, and then frowned and said, "Then let's eat quickly, Sister Aoi, you can eat too."

Aoi and Wei Kai came to Yingzhong's Mansion together, and captured Ran's heart with several pastries that she was good at. Of course, Aoi's ability to observe words and emotions cultivated under the fence also allowed her to quickly integrate into the Ying Zhong Mansion. This is also what Wei Kai wants, after all, both of them have a tragic past, and they hope that the other party can let go. However, Wei Kai's approach is different.

After a while, Wei Kai, who had bathed, came to the pavilion made by Aoi and Ran, of course, Ran would not give Wei Kai a good color. However, Wei Kai looked like he was ignoring Ran, but it made Ran, who had been pretending to be angry beside him, very angry and kept muttering beside him. Of course, Wei Kai didn't talk to Aoi, he just ate pastries at his own leisure, and Aoi took the initiative to serve Wei Kai on the side.

At this time, there was a busy scene in the official mansion of the Qin State.

People come and go, carrying heavy bamboo slips, in and out. From time to time, someone shouted: "Why is there a penny short, how is the account wrong", and then buried his head and continued to read the bamboo slips. The oil lamps around the room had already been lit, and the stacks of bamboo slips were like mountains, and the shadows on the ground were long under the dim light.

Ying Zhong, or Ying Qu Liang, he is now the second son of King Qin, and he is now worried about the money and grain accounts for this year's autumn harvest. Seeing that more than a dozen bookkeepers under the jurisdiction of the hall were working hard to calculate and check the account books received from various places, Ying Zhong felt very powerless in his heart.

Yingquliang has been here to check and calculate the accounts for two days, but he still has no clue. Accounts are chaotic everywhere, payment and income records are chaotic, and this is not the era of paper, but still rely on bamboo slips. Looking at the pile of bamboo slips placed in the middle of the hall, there has not been much change now, which has to make Yingquliang anxious, collecting taxes is a major source of the country's economy.

Through the accounting of accounts in various places, the Qin government can understand the livelihood of the people in various places, and then when the showdown of various taxes, it can adapt measures to local conditions and make full use of the people's power; Taxation can also be used to identify the merits of local officials, so as to promote capable officials, belittle corrupt people, collect talents for the use of the country, and strengthen Qin's ability to deal with national affairs. If the accounts are not sorted out in time, the Qin State will not be able to operate as usual.

The bloodline of the old Qin people from the ancestors of the brave fighting, although this makes the old Qin people fight without fear of death, but this also causes the old Qin people to be not good at learning, only to fight and kill, and the talents of the Qin State are increasingly lacking. Looking at the dozen or so white-haired old men in the hall who were checking the accounts, Ying Quliang was worried about the future of the Qin State.

The old Qin people can use swords, but the old Qin people can't govern the rivers and mountains of their ancestors. Although the implementation of the new policy by the Qin king brought hope to the Qin state, it also caused contradictions between the forces represented by the old capital of Qin and Liyang, and the domestic situation was very tense.

Jing Supervisor, who was supervising the inspection everywhere, saw Yingquliang looking at the sky sadly outside, and said: "Don't worry too much, as long as it takes some time, these accounts will definitely be settled." Ying Quliang looked at Jing Jian and said, "Jing Jian, I'm just worried about the tomorrow of the Qin Kingdom." You see, the people in the hall are all older people. The young people of the Qin State don't like this, they only have some swords, but we must not only fight the country, but also defend the country."

Jing Jian looked at Yingqu Liang and knew that his son often had different opinions about the current situation in the Qin State, but the general trend of the Qin State was like this, and Jing Jian felt both sad and powerless in his heart.

Suddenly, Ying Quliang said, "Jing Jian, do you think Mr. Zhao Qi can solve this matter?" ”

Jing Jian thought for a moment and said, "Mr. Zhao Qi, although he is knowledgeable and his remarks are often thought-provoking, he seems to be only good at debating and not good at anything else. Ying Quliang said: "No, no, I think Mr. Zhao Qi often has extraordinary ideas. I think you should first take a small part of the accounts and ask Mr. Zhao Qi. If Mr. Zhao Qi can solve the problem, then you will take Mr. Zhao Qi to the government to solve the matter; If it can't be solved, it won't embarrass Mr. Jing Jian, what do you say? ”

Jing Jian said, "Okay, I'll go find Mr. Zhao Qi." So, Jing Jian returned to the house with a small number of bamboo slips.

Every time Wei Kai finished practicing his sword, he would come to Ying Zhong's study to browse all the books in the room. After all, Wei Kai also had to confirm whether the current Qin State was the same as what he was familiar with, and he also had to understand the current situation, so that he could adapt measures to local conditions and take advantage of the situation in the future.

As soon as Jing Jian entered the door, he panted to Wei Kai and said, "Mr. Zhao Qi, I can be regarded as finding you."

When Wei Kai heard Supervisor Jing speak, he said helplessly: "Brother Jing, don't be Mr., Mr. is called Zhao Qi." Brother Jing is slightly older than Zhao Qi, and Brother Jing calls Zhao Qi "".

At the beginning, Jing Jian thought that Wei Kai was a liar, so he blamed Wei Kai in every possible way. Later, Wei Kai came to Yingzhong's mansion, and Jing Jian apologized to Wei Kai. Wei Kai didn't care about it at first, but after interacting with Jing Jian, he found that Jing Jian was a talented and upright Qin man, so he became good friends with Jing Jian and was commensurate with each other.

Running all the way to find Wei Kai, at this time Jing Jian was panting and said, "You, if you ......."

Wei Kai listened to Jing Jian's intermittent words, looked at Jing Jian in surprise, and said, "Brother Jing, are you being called for debts?" ”

Hearing this, Jing Jian rolled his eyes, took a long breath, then spit it out, and said after calming down, "I won't play tricks with you." Zhao Qi, do you tell me that you know how to do arithmetic? ”

After Wei Kai heard it: "I know some arithmetic."

When Jing Jian heard this, he was overjoyed and said, "You come with me first" and immediately pulled Wei Kai to another room. Wei Kai thought to himself on the road: You won't let me count advanced mathematics. Fourier series? Triple Integral? It's too hard, be a man, brother.

Soon, Wei Kai and Jing Jian came to a room guarded by Qin soldiers, and then Jing Jian said to Wei Kai: "Brother Zhao Qi, do you first calculate the accounts of the bamboo slips left in the room?" Then he sat next to him and picked up the water in the teapot, and looked at Wei Kai while drinking.

Wei Kai opened the bamboo slip and looked at the accounts recorded on the bamboo slip, and immediately breathed a sigh of relief in his heart. Faced with the accounting calculation of income and expenditure, Wei Kai still has a certain amount of confidence in his heart. After reading the bamboo slips on the table, Wei Kai quickly had an answer to the accounts in front of him, thanks to the education in his previous life.

The Jing supervisor on the side watched Wei Kai flip through the accounts but didn't speak, thinking that Wei Kai couldn't do arithmetic. Jing Jian was suddenly anxious in his heart, and said, "Zhao Qi, do you have a way?" ”。

Wei Kai thought for a while and said: "I probably know how to do it", and then said: "These accounts collect a total of 7,685 yuan, spend 3,556 yuan, and have the remaining 4,129 yuan."

When he heard Wei Kai slowly talk about the results of the accounts just now, Jing Jian was dumbfounded. The results Wei Kai said were indeed exactly the same as the results of multiple calculations. But just now, Wei Kai obviously just casually glanced at the accounts on the table, and came up with the result very quickly, while Jing Jian's result was a figure that the account room had calculated for a long time.

Jing Jian came back to his senses, looked Wei Kai up and down, and thought: Wei Kai, a godman?

Wei Kai looked at Jing Jian and sighed in his heart. Although Qin Guo also has an algorithm now, this is an evolution from Zhou Yi and is obscure. At the same time, although there is already an algorithm, the notation is complicated, and the algorithm is not as simple and intuitive as the Arabic numerals that Wei Kai learned in his previous life, so it is inefficient.

Ignoring Jing Jian's surprised appearance, Wei Kai said: "This is actually very simple. If you are willing to learn, I can teach you".

Jing Jian was very moved when he heard that Wei Kai was willing to teach what he had learned. After all, in this era, all kinds of family crafts can only be passed on from master to disciple, and father to son. Moreover, Jing Jian already regarded Wei Kai's fast algorithm as a kind of magic technique. Jing Jian excused himself: "How can Jing Jian learn such a divine technique? ”

Seeing this, Wei Kai sighed in his heart: It turns out that arithmetic is also a kind of talent.

So, Jing Jian hurriedly sent a message to Yingqu Liang and dragged Wei Kai to the official mansion by himself.

Yingquliang, who got the news, was also very happy in his heart, so he went to the door early to greet Wei Kai. Wei Kai saw Yingquliang waiting for him at the door, and he was also very moved. After all, Ying Qu Liang's thirst for talent and sincerity of Wei Kai's courtesy, Wei Kai can feel it every time Wei Kai meets Ying Qu Liang. Moreover, Wei Kai approached Yingquliang for a purpose, so he was ashamed every time.

"Mr. has such a great talent, but Ying Zhong doesn't know it, this is exactly Ying Zhong's fault", Ying Zhong said to Wei Kai. "Childe doesn't have to be formal. As a guest of Gongzi, Zhao Qi should share his worries for Gongzi", Wei Kai replied. Then Ying Zhong took Wei Kai to the place where the Qin government accounted for the accounts.

Several of the older bookkeepers in the temple laughed when they heard that someone could quickly settle the accounts in their hall. Algorithms, this is a difficult kind of learning, it takes not only time but also talent, and now some people say that it can be made overnight, isn't it a big joke?

Seeing Wei Kai and a few people walking in, several account offices looked at Wei Kai with contempt, didn't they sneer a few times, and said, "Young man, measure your own .........." "Algorithm, isn't this a meal?" Wait a minute.

Wei Kai laughed and thought to himself: When advanced things are created, it is always indispensable to be difficult. When Copernicus created heliocentrism, he was killed by the church, and he was only ridiculed.

Looking at the Jing Supervisor next to him who was about to refute, Wei Kai immediately saluted and said, "What the elder said is very true. But Zhao Qi has been taught by his teacher about algorithms, can he let Zhao Qi give it a try? ”

The sneering old men, seeing Wei Kai's appearance, were not easy to refute, and said, "Let's take a few of us to take a break and see the little brother's mastery", and laughed after speaking.

Wei Kai didn't care, so he first asked Jing Jian to find ten people who could read and hyphenation, and then in front of those bookkeepers, he taught the ten readers Arabic numerals and decimal arithmetic. Looking at the "0123456789" instead of the relevant symbols in the accounts, and then performing a quick calculation, the results are consistent with the original algorithm after being compared many times.

The few account offices who were sneering just now were also surprised at this time. Hurriedly took the results calculated by Wei Kai, and after checking the results again and finding the same, he was stunned in place, and his face became red.

On the side, Jing Jian and Yingquliang were amazed when they saw Wei Kai's algorithm.

Wei Kai looked at the embarrassed appearance of the bookkeepers at this time, and stepped forward and said, "The old gentleman has worked hard and has made great achievements, and he can teach for my generation." Mr. sneered at Zhao Qi before, this is also worried that Qin's state affairs will be delayed by Zhao Qi, and Mr. does not have to blame himself. That's what it takes to be a courtier."

Those few account offices were originally angry, but after seeing Wei Kai's new algorithm, they were also very impressed. Now when he heard Wei Kai say this, he suddenly had a good impression of Wei Kai and said, "We are really ashamed", and was about to apologize for ridiculing Zhao Qi just now, Wei Kai hurriedly stopped him and said: "This is Zhao Qi's fault, gentlemen don't have to be formal." ”

Then, Wei Kai said: "Zhao Qi once got a new method of bookkeeping. Zhao Qi didn't know the secret, and hoped that Mr. could guide those ten young people so that they could carry them forward." So, Wei Kai used a brush to describe the double-entry bookkeeping method on the bamboo slips to the bookkeepers, and the bookkeepers saw Wei Kai's double-sheet bookkeeping, and immediately found that this method was ingenious, and it was more straightforward and clear than the previous account table

Now, Wei Kai actually asked them to teach them, and their names will definitely be passed down through the ages with these new abacus, which is a great merit. Immediately looked at Wei Kai and was moved.

Ying Qu Liang and Jing Jian looked at Wei Kai regardless of their previous suspicions, treating those gentlemen like this, and felt that Wei Kai was really a gentleman, so Ying Qu Liang was more courteous to Wei Kai.