Mrs. Mi stepped forward, stroked Liu Tai's head with her hand, and said with a smile: "The king originally said that in a few years, I would invite Mr. when Atai was older." But I think it's better to learn it early, so I brought him with me today, Zhongzheng, you just watch and teach, just learn as much as you want. ”

In fact, according to Fang Shao's point of view, children should not learn anything before the age of six, except for knowing a few words, as long as they have fun playing, otherwise they will be bound by books since childhood, and where will they have any innovation ability when they grow up.

However, since Mrs. Mi wanted to ask for this, Fang Shao had no choice but to say: "Since Mrs. Mi has a life, then Shao should teach it with her heart." ”

"Then you can go to class, I won't bother." Mrs. Mi turned away, and when she parted, she left Fang Shao with a smile.

Fang Shao could see that there was a hint of melancholy hidden in Mrs. Mi's seemingly relaxed smile. Fang Shao suddenly understood why she was in a hurry to let Ah Tai go to school, perhaps it was because Mrs. Wu also gave birth to a son for Liu Bei not long ago, so Mrs. Mi had a sense of crisis, so she was anxious to train her own son to become a talent.

Mrs. Mi left, and only two little sons remained in the study.

Liu Chan sat there solemnly, while Liu Tai followed his brother's example and sat side by side.

Fang Shao officially began to teach, the first class was to teach the "Analects", what "friends come from afar, do not talk about it", "learn from time to time", "review the old and learn the new" and the like, how the teacher taught him when he was in school, he only had to move over according to the cat and the tiger.

After finishing the "Analects", Fang Shao put the "Mathematics" he wrote himself in front of the two little boys.

Liu Chan picked it up and flipped through it for a long time, and found that it was full of strange symbols, which he had never heard of before, and couldn't help frowning slightly, "Sir, what is drawn in this book, I don't understand it at all." ”

When Liu Tai saw those strange symbols, his little face showed great curiosity, as if the child had found something novel and interesting, showing great interest.

Fang Shao smiled and said: "These symbols are called mathematical symbols, put these symbols together, it is called arithmetic, from today onwards, Mr. will begin to teach you this new course." ”

Liu Chan was a little confused and puzzled: "Sir, is there any use in learning this mathematics?" I don't want to be a Taoist priest, so I don't need to learn how to draw talismans to exorcise ghosts. ”

Liu Chan's words almost didn't make Fang Shao laugh, this kid, he regarded this mathematical symbol as the same thing as the mess of Taoist priests' ghost drawing talismans.

Fang Shao had no choice but to patiently explain: "Childe, don't underestimate this "Mathematics", the source of the universe of heaven and earth, and the generation of yin and yang of all things, are all in these symbols. ”

Liu Chan seemed to understand something, but he still seemed to be confused, "Then what's the use of knowing the source of the universe of heaven and earth?" Didn't Sir teach me before that all the truths in the world are in the words of the saints? ”

Fang Shao said this before, but it was just to fool the child, but he didn't expect Liu Chan to remember it quite firmly, which made Fang Shao not know how to explain this important surname of mathematics to this child for a while.

As a person who has traveled through time, Fang Shao certainly knows that modern science is based on mathematics, and the reason why China has not been able to evolve a modern scientific system is also inseparable from the fact that there was no mathematical system in the strict sense in ancient China.

Of course, Fang Shao also knew that ancient Chinese mathematics was often empiricism, that is, the laws drawn from long-term and repeated practice were conclusions summarized from practice, which were just an induction, but lacked rigorous proof. Of course, this is also closely related to the ancient Chinese philosophical thinking model, which does not attach importance to logical reasoning, which is its fatal weakness.

In the same way, ancient Chinese mathematics still lacks a systematic surname, and all theories are very scattered, as far as the most famous mathematical work "Nine Chapters of Arithmetic" is concerned, it only explains interesting phenomena and results, and does not give reasoning, and the arrangement of chapters is also divided according to the practical surname of agricultural production, not according to the strict mathematical system.

Fang Shao also knows that even if there is no excellent mathematical system and research atmosphere, China will be ahead of the world for thousands of years, but one day, when the world's science develops to a certain extent, quantitative changes will inevitably produce quality, and at that time, China will inevitably have to pay a heavy price for emphasizing humanities over mathematics.

Fang Shao also understood that it was difficult to change such a historical process on his own, and only when the ideological atmosphere of the entire society no longer regarded science and technology as "miraculous skills" but a kind of compulsory courses such as "Analects", "University", and "Tao Te Ching" that needed to be studied and studied, could the history of China's scientific development be truly changed.

Therefore, Fang Shao wants to plant a seed in these two children, hoping that one day in the future, no matter which of them can become the king of a country, they can rely on the power in their hands to promote Fang Shao's expectations for them, so that that seed can take root and sprout in this ancient land, and in hundreds or thousands of years, it will be able to bear the fruits of modern science, so that this country will always stand in the forest of the strong, and will not suffer less from those sufferings.

Of course, of course, Fang Shao didn't have a chance to see things so far ago, but he wanted to go back in time for a while, in addition to being a person like Zhuge Liang in the future, who was only regarded as a generation of good ministers and left a name in history, Fang Shao also hoped to leave a few more important strokes in history.

But there was no way, now Liu Chan had to ask him what was the use of this, Fang Shao thought about it for a while, and had to say: "The words of the sage are naturally to be learned, but this mathematics is also useful." For example, in the future, when Gongzi grows up to become an adult, he is ordered by the king to lead troops to the battle, and the king gives Gongzi thirteen battalions, each with 437 people, can the prince calculate how many soldiers he has? ”

Liu Chan didn't figure it out for a long time, so he said, "What's this...... If I am a general, how can I be careless about everything, and how many soldiers there are, the adjutant generals will naturally tell me. ”

This kid is quite good at saving trouble.

Fang Shao then said: "Okay, let's say that Gongzi returns victoriously, and the king gives Gongzi 10,000 horses of Shu brocade, and Gongzi wants to share the rewards to the soldiers who go out with the army, so how much will each person be rewarded?" ”

This time, Liu Chan even relied on his fingers, and replied very simply: "It's the same, I'll just leave it to the deputy generals." ”

Fang Shao was unhappy when he heard this, and secretly thought: "Okay, it's all left to the people below, no wonder Zhuge Liang took over the power of Shu Han back then, and most of it was you who had to take care of it yourself." ”

At this time, Liu Tai babbled and said, "Sir, this math is very interesting, Atai wants to learn, Atai wants to learn." ”

The young Atai is obviously more interested in the new thing of mathematics than his brother, it seems that Liu Chan's thinking has begun to be finalized, such a big responsibility, I am afraid that it is not good to count on him anymore, fortunately, there is also Atai, the little guy, seems to have a strong interest in mathematics, which makes Fang Shao feel relieved.

On the one hand, Fang Shao taught the two sons homework, and on the other hand, he was ordered by Liu Bei to form a Zhuge crossbow army of about 1,000 people, and in a blink of an eye, the scorching summer was over, and after a heavy rain, the coolness of early autumn swept the entire Yizhou.

In the early morning of this day, as soon as Fang Shao got up, Zhuge Liang sent someone to invite him, saying that the king of Hanzhong had sent someone to come back and forth to Chengdu to see the two of them, and said that there was a secret matter to discuss with him.

Fang Shao hurriedly finished dressing and hurried to Zhuge Liang's mansion.

"This is the secret letter of the king of Hanzhong, you can take a look at it first." As soon as he arrived at Zhuge Liang's mansion, he gave a handwritten letter from Liu Bei to Fang Shao.

Fang Shao took it over and took a closer look, and couldn't help but be slightly surprised. At this time, the king of Hanzhong said in his letter that Guan Yu of Jingzhou received a secret letter from the new Nanyang Taishou Cai Mao not long ago, saying that he was willing to surrender to the king of Hanzhong with Nanyang County, and only asked the king of Hanzhong to pardon the crimes of the Cai family regardless of his previous suspicions.

Fang Shao read the letter and couldn't help but wonder: "Hasn't Cai Mao been in Xudu all the time, when did he become the Taishou of Nanyang?" ”

Zhuge Liang said: "I heard that less than a month ago, Cao Ying moved tens of thousands of Jingzhou immigrants into Nanyang County, and it was difficult to govern because of repeated conflicts with the locals, so Cai Mao was transferred to Nanyang Taishou, hoping to appease the hearts of those immigrants through him." ”

Fang Shao nodded slightly, "If that's the case, it's reasonable, but Cai Mao wanted to kill the king back then, but now he suddenly said that he wanted to raise the county and surrender, which made me a little novel." ”

Zhuge Liang smiled, "The reason for the people is also very clear, because it is not allowed to be reused under Cao Ying, he is depressed, and he regrets the fall of Xiangyang and the Cai family, so after weighing, he plans to return to the king, and the reason for surrender is also reasonable." ”

Fang Shao closed the letter, "Nanyang is the gateway to Xu Luo, if you can get it, then the soldiers and horses will travel in the starry night, and within two days, you can go straight to Luoyang and Xudu, or go west to Wuguan and take Guanzhong, which is equivalent to inserting a steel knife into Cao Ying's henchman!" In this way, the difficulty of our Northern Expedition to the Central Plains will be much easier. ”

Zhuge Liang always had a smile on his face, "The king also thinks so, so he attaches great importance to this matter, so he specially ordered someone to go back to Chengdu to listen to the opinions of you and me." ”

Fang Shao pondered for a moment and said silently: "The key to this matter lies in the authenticity of Cai Mao's surrender, if it is true, then everything is naturally easy to say." However, the land of Nanyang is all plains, there is no benefit of the Hanjiang River water network, and there is no danger of the Qinling Mountains, our army goes deep into this place, if Cai Mao is just a trick to lure the enemy, when the time comes, Cao Ying's iron cavalry will suddenly arrive, our army will be caught off guard, only afraid of ......"

Fang Shao didn't finish his words, but Zhuge Liang already understood, and said: "This is exactly what I'm worried about, in a moment's thought, happy events may turn into disasters." ”

(To be continued)