Although Liu Xin is now in a high position, he is much higher than Cao Ying, Liu Bei, and Sun Jianlai in history, but he knows in his heart that if he really wants to dominate the world, it is not something that can be achieved overnight. Historically, Yuan Shao's strength was stronger than Cao Ying, but he was defeated by Cao Ying; Cao Ying's strength was stronger than Liu Bei and Sun Quan, but he returned home in Chibi. There are many examples of this kind of defeat of the weak over the strong, and there are many reasons why the strong side will lose, but they have one thing in common, that is, they lack a clear mind.

Moreover, Liu Xin's focus is not only on defeating the heroes and dominating the world, he also has his own longer-term goals, the grasslands in the north, the vast sea, these troubles have bound the Han nation for thousands of years, even if it can't be cut off on his own hands, at least to lay a solid foundation for future generations.

Since the New Year, Liu Xin's series of initiatives can only be regarded as a short-term plan, and to achieve his lofty goals, the most needed is talent! Although Liu Xin had also thought about setting up an institution such as the Zhaoxian Academy, he understood that in the nearly 100-year Three Kingdoms hegemony, the real heroes and wise men had already come to the fore, and their names would inevitably go down in history. Liu Xin, who came from 1,800 years later, was already familiar with not only the names of these people, but also their surnames. Even if there are one or two talented people who are buried in the net, Liu Xin doesn't know their situation, and it doesn't matter, just treat them as if they have slipped through the net. Moreover, if the Zhaoxian Academy is set up now, it is easy to arouse the suspicion of the emperor, and then it will obviously outweigh the losses. Therefore, as soon as this idea came out, it was immediately vetoed by Liu Xin.

Liu Xin now pins all his hopes for cultivating talents on Xiangyang Academy, Cai Yong, this old gentleman is indeed not simple, he is a university scholar himself. At the age of more than fifty, he has already passed the age of knowing the destiny of heaven, but he is still thirsty for knowledge, he is not only interested in the mathematics and physics taught by Ma Yun, but also interested in the knowledge of heaven that Cai Yan learned from Ma Yun. He was indeed the perfect person to preside over the College.

Soon it was the beginning of the new semester, Liu Xin walked to Cai's mansion, he wanted to see how Cai Yong was prepared. Cai's mansion is only a stone's throw away from Liu Xin's state pastor's mansion, but Liu Xin is still the first time to come to the door.

Hearing that Liu Xin was coming, Cai Yong hurriedly greeted him and said, "Lord, why are you here?" ”

Liu Xin said with a smile: "We have been neighbors for a long time, and we haven't come to visit the door yet, so I came to see the old gentleman today." ”

Cai Yong welcomed him into the door, and muttered in his heart, he always felt that he meant something to Cai Yan before, but he had never heard him express it directly, and he didn't know if he came here today for this.

But I heard Liu Xin say: "Uncle, school will start in a few days." The last semester was relatively short, but this year is a full semester, how are you preparing? Are there any difficulties? ”

Seeing that Liu Xin had made a special trip to learn about the situation of the academy, Cai Yong took his mind back temporarily, he was very attentive to the academy, and said without thinking: "There is no problem in all other aspects, but Mrs. Ma's health is not very convenient, and she can't come to teach students mathematics and physics again this year." The mathematics and physics that Mrs. Ma talked about were quite different from what Lao Yu had learned in the past, and she couldn't find a suitable person to replace her for a while, and Lao Yu was worried about this matter. ”

Liu Xin couldn't help laughing, this matter is indeed not something that Cai Yong can solve, even if you ask him to find the entire Han Dynasty, you can't find a second person to replace Ma Yun to teach mathematical knowledge. Fortunately, Ma Yun's teaching has only started for two months, and Liu Xin still knows how to do these simple four operations, so he said: "Don't worry about this matter, it's really not good, I'll teach them personally." ”

Cai Yong knew that Liu Xin was strong in martial arts, and he also admired his attainments in poetry and writing, but he didn't expect that he also knew mathematics and physics, and said in surprise: "The mathematics taught by Mrs. Ma is broad and profound, is the lord also good at this?" ”

Liu Xin said modestly: "I only know a little bit about it, but there must be no problem in teaching children, besides, I can go back and ask my wife if I encounter problems." ”

Cai Yong hesitated and said, "It's just that the lord is busy with affairs, I'm afraid I won't be able to spare time." ”

Liu Xin waved his hand and said, "No matter how busy you are, it can't affect the children's learning, you can still take out half an hour to an hour every day." ”

Cai Yong saw that the problem he was most worried about was unexpectedly solved, and said happily: "That's great, so that there will be no other problems in the academy." ”

At this time, Cai Yan suddenly turned out. She now runs to the state pastoral mansion almost every day, saying that she is going to listen to Liu Rui's story, in fact, there is another reason that she wants to meet Liu Xin, who knows that Liu Xin has passed the Chinese New Year's Eve, and now she is focused on Jingzhou affairs, and she has very little time at home during the day. Now, Cai Yan knew that Liu Xin had come to her house, where would she let go of such an opportunity, so she quietly walked to the front hall, and kept hiding behind the screen to eavesdrop, just heard that Liu Xin was also familiar with mathematics and physics, and couldn't help but walk out and said: "It turns out that adults are also proficient in mathematics and physics, and there is a problem for the people's daughters here, I don't know if adults can solve it?" ”

Cai Yong was very conflicted about his daughter's meeting with Liu Xin, and hurriedly scolded: "Yan'er must not be rude!" ”

"Mr. Bo, it's okay." Liu Xin stopped Cai Yong while feeling deeply embarrassed, he knew that Cai Yan was a talented woman, and the problem in the eyes of a talented woman was probably not difficult for ordinary people, but it was not easy to retreat, so he had to bite the bullet and said, "Liu is ashamed, he only knows a little bit about the way of mathematics and science, and he is not proficient, I don't know what problems Miss Cai has, why not speak out and listen, Liu will do his best, and I dare not guarantee whether he can help." ”

Cai Yan took out a piece of paper, handed it to Liu Xin, and said: "It's the question on the paper, and the folk girl racked her brains, but she still couldn't solve it. ”

Liu Xin took the paper in her hand without hesitation, and took a closer look, a nine-square grid was drawn on the paper, and her heart couldn't help but be settled. Although Liu Xin dropped out of school when he was a child, it was because of a sudden family change, in fact, his academic performance was still relatively good. Jiugongge is also called Sudoku game in later generations, Liu Xin still liked this aspect when he was a child, and when he grew up, he often did some Sudoku to relieve boredom in his spare time. Unexpectedly, when he came to the Eastern Han Dynasty, there were still people who came to ask him about Sudoku problems, Liu Xin felt very cordial, and his confidence increased, and said: "Mr. Bojiao, I am tired of borrowing pen and ink." ”

Taking the brush from Cai Yong's hand, Liu Xin spread the paper on the table and began to write. After a while, Liu Xin gently put the pen aside and said, "Okay, is it still correct for Miss to see?" ”

Cai Yan picked up the piece of paper, and when he saw Liu Xin's words, he couldn't help but cover his mouth and laugh. Although Liu Xin practiced calligraphy for a few days when he was a child, he didn't know where to throw it after so many years. Although there are only a few numbers from one to nine written on this paper, they are all in traditional Chinese, which is really a bit difficult for him.

Liu Xin's old face turned red, and he said curtly: "Yes, my word is indeed a little ......."

Cai Yan had already stopped laughing, his eyes widened, revealing an incredible look, and he said in surprise: "My lord has really solved it." ”

Cai Yong snatched the piece of paper when he heard this, looked at it carefully, and sure enough, it was exactly the same, but the writing was a little bit like that, and he couldn't help but shake his head.

Liu Xin saw him shake his head, and hurriedly asked, "Uncle, is there anything wrong with me?" ”

Both of them are great calligraphers, Liu Xin's hand of dog crawling words naturally can't get into their eyes, Cai Yan already knows what his father means by shaking his head, so he said with a smile: "No, no." This is what the folk girl saw from an ancient book, and it took three days to solve it, but I didn't expect the adults to solve it at this time. ”

Liu Xin also said with a smile: "This kind of nine-square grid game, I used to use it to pass the time when I was in a small mountain village in the past, and it is not uncommon to solve it occasionally." There are also many kinds of nine-square grids, like this is called the standard nine-square grid, in addition to the diagonal nine-square grid, the number ratio nine-square grid, the window nine-square grid, and the most difficult to solve is called the killer nine-square grid. ”

Cai Yong's father and daughter didn't expect that there would be so many tricks in the small Jiugong Grid, and they were immediately attracted by his words. Cai Yan blurted out, "I don't know which small mountain village the adults used to live in?" ”

Liu Xin was stunned by her question, but he reacted very quickly, and immediately replied: "Oh, my wife and I used to live in a small place called Global Village. ”

"Global Village!" Cai Yan exclaimed in surprise, "I heard my wife say that the land we live in is called the earth, and the earth always revolves around the sun, why is it just called the global village?" ”

Liu Xin secretly complained, this Ma Yun is really good at making trouble, she has nothing to do to promote what "Yu Xin Said" does, just now I casually lied, I didn't expect this little girl to be more real, as the saying goes, you have to use ten lies to round out a lie, how is this good? Liu Xin snorted twice, suddenly became anxious, and said, "This, here's the thing." The young lady also knew that most people thought that the earth was flat, and that the sun rose in the east and set in the west. But the people of our global village believe that the earth is round, the sun is immobile, and the round earth revolves around the sun every day. ”

Cai Yong had never heard of the theory of "saying the heart", so he said puzzledly: "No, the earth is obviously flat, if the earth is round, how can people stand on it?" ”

Cai Yan had heard Ma Yun explain this problem, although she didn't know too much, but she was very willing to be her father's teacher, so she said eloquently: "Dad, I know this, Madame once told me that there is a force between objects and objects, called gravity, so whether it is people or other things, they are attracted to the earth." ”

Speaking of this, Cai Yan also seemed to feel that there was something wrong, and said: "It doesn't seem right, you see that I am standing so close to adults, if there is any gravitational force, why didn't they suck together?" ”