Sennai Shodo Book House.

Sun Dan smiled and pressed his hand down, and before he could speak, a student on duty shouted: "Sit down."

The thirty or so students in the class did not sit down, but all looked at the beloved gentleman steadily.

Chen Hong still had tears flowing on his face, and through the tears, he saw that the eyes of the other students were red.

Probably noticing the strangeness of the students, Sun Dan said in surprise: "Why don't you sit down, sit down, let's start the class."

At this time, all the students sat down at the same time, but Chen Hong was still standing there, his heart was like a mess.

Sun Dan still did not sit on the tip of the podium as usual, but walked slowly behind his back. "Chen Hong, what's wrong with you?"

Chen Hong now couldn't care about letting people show his special relationship with Sun Dan, and asked loudly: "Sir, I heard that you are leaving us tomorrow, is it?" We have been with you for so long, and we are very impressed by Mr. 's knowledge, and we are about to learn from you the true skills of the world, but you, but in addition to your sadness, Chen Hong also has a kind of anger in his heart that was abandoned.

"I see!" Sun Dan smiled gently and looked at all the students: "You all already know."

No one answered this question, and everyone looked at Sun Dan sadly.

Chen Hong wiped a handful of tears with his fist and continued to question, "Sir, you should answer our question."

Sun Dan's expression was still as quiet as usual: "Yes, classmates, Mr. will take the exam tomorrow, and this exam is nine days." Regardless of whether I am a jinshi or not, the imperial court has other arrangements for me. Today is the last time I'll teach you a lesson, didn't I tell you before? In the future, after completing your studies, you will all hold certain positions in the palace and serve the country. To be a qualified national civil servant, one should possess three elements: public service, loyalty, and competence. Gong is to be dedicated to the public, just and upright; Yes, that is, to have a certain ability to work; Loyalty means to be loyal to one's duties, to be loyal to the entrustment of the court, and to be loyal to the expectations of the people. Since the imperial court has a task for me, the gentleman naturally has to obey orders, which is also loyalty to the country and to his duty. As a teacher, Mr. should be your role model. Chen Hong, sit down

Sun Dan walked up to Chen Hong and stretched out his hand to press him on the shoulder.

The resentment in Chen Hong's heart has not been eliminated, but he still goes on with the trend, as if there is an irresistible force in his husband.

Sun Dan looked around and said to everyone, "Originally, I arranged a class of "Human Relations" today, but unfortunately I will leave tomorrow, so I will not limit the subjects today. Let's change that, you can ask as many questions as you like. The gentleman answered on the spot. I hope you will sort out the doubts that have arisen from your previous studies. I don't have much time

It was the students who answered at the same time.

This is the last class! Chen Hong had a stirring in his heart, he tried to sort out the knowledge he had learned from Sun Dan for a period of time, but after sorting it out for a long time, his heart was still troubled, as if everything was so clear, and as if everything was so chaotic, he couldn't find a clue at all.

Damn, this is the last lesson for the gentleman, what should I ask?

"Human Relations", God, I'm still the one who twists my temper and doesn't know how to get along with people; The official document writing of the organ, during this period of time in the celebrant supervisor, every day on the fold of the red, but it can be summed up as "quasi-re-discussion knows." A few words. Arabic numerals, four operations? Poor now, I can only live in the same cage, and some students have learned the Pythagorean theorem and elementary geometry; As for elementary physics, how is buoyancy calculated?"

Some students have already begun to ask questions: "Sir, may I ask if the historical books say that Emperor Yan of Sui was a tyrant who was very happy, but the Grand Canal he dug has been used to this day and is the main hub for communicating the north and the south. But why did he brazenly attack Goryeo despite the fatigue of his national strength, so that he ended up with the destruction of the country? . One... First, this is a matter of history.

Sun Dan: "Everyone knows that with the national strength of the Sui Dynasty at that time, it was no longer able to support a national war, but even if Emperor Yan of Sui did not attack Goryeo, would Goryeo not attack the Sui Dynasty, Emperor Yan of Sui was just a preemptive." As for Emperor Yan of Sui's evaluation in history, I personally think that any thing he did could make him a generation of Ming monarchs if he did it alone, but it was a pity that he concentrated these few things together, which was the reason for the fall of the Sui Dynasty. On the surface, it seems that Emperor Sui Yan is very happy. But the root cause is that the Sui Dynasty was not centralized enough, and there were still a large number of powerful and clan forces in the local area, so that the imperial court could not accurately calculate whether the country's financial resources and manpower could support one national project after another. The death of the Sui Dynasty was due to the weakening of the central forces and the strength of the local forces

Someone else asked, "Sir, you said in class before that to calculate the square and volume of an object, you can multiply the three numbers of length, width, and height. This method is naturally very useful for calculating the amount of earthwork, but if we encounter an irregular object, such as a large stone, how do we calculate its volume? This is basic mathematics.

"There's also a good way to put stones into a pool filled with water, and the pool opens an outlet one at a time. If you put a stone in the pool, the water will overflow. And the volume of the overflowing water is the volume of this irregular stone, which can be easily calculated by simply putting the overflowing water into a regular container. ”

"That's a good idea, thank you, sir." The students who asked the question suddenly realized that their hearts were filled with joy.

I don't know how long the concubine has passed, and the minutes and moments have passed.

The questions of the students are also varied, there are all over the world, and some people even ask the eunuchs in Sun Dan's palace because they are semi-yin bodies, and they can't stand the cold in winter, so how to recuperate in daily life.

And Sun Dan also did not refuse to come, and answered them one by one. In fact, the strange and unsolvable questions that seemed strange to the ancients seemed to him as a modern person were some common sense, and besides, relying on the huge database in his own brain, what kind of questions could not be answered?

It was at this moment that the students finally understood how knowledgeable Mr. had been.

Chen Hong's heart was still in turmoil, looking at the gentleman who was walking around the book room with a partial demeanor, he realized what a valuable academic master he had encountered. It's a pity that he was bent on currying favor with Huang Jin, and he went against Mr. Sun everywhere, and he didn't study hard. By the time I realized the value of my husband and wanted to learn the real skills, it was already too late. Sun Dan walked up to Chen Hongming again and said, "It's almost time, all the classmates have already raised their own questions, and you are still one more." It's noon now, Chen Hong, if you have any questions, just say it, and I'll leave class after I finish answering your questions. ”

"It turns out that this lesson is over, time flies so fast!" Chen Honghong was shocked. He stood up abruptly and said excitedly, "Sir, Chen Hong will ask you one last question. You have taught us so much, you teach everything, and you are not confined to the Four Books and the Five Classics. There are so many miscellaneous things to learn. What kind of people does the gentleman want to educate us to be, or what is the purpose of our learning so much? Not to mention cultivating talents for the country, even if we change to another student, according to our quality, we can still succeed. ”

Chen Hong asked excitedly, "Sir, what kind of person do you want us to become?" ”

All the students quieted down, and Chen Hong's question spoke to their hearts.

Sun Dan was silent for a moment, looked at Chen Hong, and said quietly: "I want you to become a real person." ”

In the prison of the Criminal Department, Master Gu was still laughing loudly: "Strange and strange, how can a small person be the head of the Inner Book Hall?" Lu Fangxiao, I see that you, a little eunuch, still have a little knowledge, and I don't want those annoying eunuchs to know some sage words.

But after reading a few books, you have grown up in knowledge, why don't you know how to be a person, you speak and deceive people, and you don't even want the least shame. "Haha, is it enough to be qualified to be a senior?" You lie and don't know how to blush? ”

Lord Gu laughed, and the other people in the prison also laughed, and they all said: "Yes, yes, eunuchs and thieves are untrustworthy, and they don't even understand the basic system of the imperial court, and they still come here to talk big." Listening to the commentary on the "University" he just read, his teacher Sun Dan was a little learned. However, this little eunuch wants to put gold on his teacher's face, so he won't use the words that he is the senior of the Inner Book Hall to deceive people, right? The seniors of the inner study hall are all bachelors of the Hanlin Academy, a small person, I think I want to be a bachelor and want to go crazy. ”

At this time, if it was Chen Hong, and heard someone say this about his teacher, he was afraid that he would have jumped up and scolded others in the prison.

But unlike Chen Hong, Lu Fang is just a quiet character, he still sits upright on the ground, and he doesn't explain, only laughs sarcastically, and says: "You have been locked up in this five-foot square area for a long time, and I don't know how big the sky is outside." Hehe, look at it, there is a five-foot blue brick floor at the foot of here, and there is only a one-foot-square air window on the head, if a person is in a well! He dragged out his voice and sang a paragraph from "The Legend of Huansha" composed by Zhanbu: "Well frogs can't talk to the sea, and they are confined to nothingness; Summer insects can't talk to the ice, but to the time; Qushi can't speak to the Taoist, bound to the teaching! Although my teacher is from a good background, his academic articles are all first-class in the world. Because of this, he was appointed by His Majesty for his meritorious service, such as teaching in the inner study hall. In my opinion, compared with Mr. Wang's knowledge, those bachelors of the Hanlin Academy are simply local chickens and dogs, and they are not worth mentioning. ”

This sentence hit a wide area, and the people in the prison were silent for a moment, and then suddenly said:

"What an arrogant thief, you can talk to us like this!"

"What the hell, who is sitting here is not from Jinshi, Cijinshi, Tongjinshi, who has not been a magistrate, who has not read the books of sages for many years, and is actually taking it in front of us?"

"I see that the "University" that Sun Dan just annotated in his mouth is decent, and there is nothing surprising about it." Master Gu said loudly: "For anyone, as long as you calm down and study this book repeatedly for ten or eight years, you can also ponder it thoroughly." I see that the teacher in your mouth is also a rotten Confucian, as for why you got the emperor's handpick, I understand. He has a student of a eunuch like you, so he naturally gets close to the eunuchs on weekdays. It was probably after following the path of your eunuchs that I entered the inner study hall. This is the shame of the scholars, and Gu Tai deeply despises it. ”

Gu's surname is Gu Mingtai, and he is also a person who can speak. continued to shout: "Reading a few books of sages is not a skill, why is reading books, isn't it just to be an official?" If you only know how to read death, even if you become an official, you will be a mediocre official and a dull official. ”

"Unconscious official, mediocre official?" Lu Fang sneered: "Lord Gu Taigu, back then... When the yamen of the river was hanged, the state allocated so much money for river defense every year, and the "cool boss did something, the flood every year, the embankment burst every year, aren't you just a faint official?"

"You" What do you know about river defense? Master Gu was said by Daofang about his shortcomings, and he didn't feel speechless.

"I don't understand, but my husband does. Although he is a lifter, in terms of his views on river defense, he is much more proficient than you, the official of the river yamen, Lu Fang read aloud after speaking: "If you pass through the river, you will govern the river to govern the river; If the river is in Huai, then the Huai is to govern the river; Hui River, Huai and the same into the sea, then the river, Huai is to govern the sea, "the Yellow River is the most turbid, to fight it, the sand dwells in its six" to build a bundle of water, to attack the sand with water, can be a year in the two rivers to return to the right, the sand brush the water deep, the Haikou is opened, the field is full of reflow and return to the industry, the national economy is unhindered." He began to recite Sun Dan's writings again.

Suddenly, it is a strategy for governing the river.

When Lu Fang first started reading, Gu Tai still had a sarcastic smile on his face, but the more he listened to it, the more frightened he became, and the smile on his face froze at the end, and his heart exploded like a big thunder.

He has been a river official all his life, how can he not hear what Lu Fang is reading.

In the past, when he was an official in the Yamen, the Huanghuai and Huai rivers decided to mention it every year. As an official, he could only do his best to build dikes and plant trees on his promotions. But the embankment was repaired every year, and it was so blocked that it filled itself into the prison.

I've been in prison for a few years. It is not that he has not reflected on what he has done in office. When it comes to honesty, he is a person who does not eat black money indiscriminately, and when it comes to being capable, he is a capable officer under the top command of the river yamen, and when it comes to diligence, every year when the peach blossoms come down, he moves to the embankment, and he lives for a month.

But even so, how can water not be treated well?

In this article, Sun Dan put forward many new ideas, such as washing the river with water and slowing down the siltation of the Yellow River, which made Gu Tai's eyes light up, and he muttered unconsciously: "In the past, I only blindly repaired the dam, but the more the dam went up, it didn't take a year for the sediment to silt up and the water to come up." Then, the construction of the dam had to continue. Endless, endless, "why is it endless?"

No one spoke, and the people in the prison were all knowledgeable, and they all listened attentively to this policy for governing the river.

The article is very long, with tens of thousands of words. It was impossible for Lu Fang to finish reading it all, so he only recited for a moment before stopping.

Gu Tai hurriedly said: , little eunuch, why don't you read it. Who wrote the article and who wrote it. So big and evil? ”

Changfang: "Dacai, you finally admit that the person who wrote this article is Dacai?" If you want to hear it, after you get out of prison, you will buy books to read

Gu Tai also didn't care about carrying it with Lu Fang, and said: "People who can write this kind of practical articles are naturally talented, and Gu Tai admires them." Buy books, what books to buy, and who wrote them? He continued.

Changfang finally laughed, laughing so much that tears rolled down from the corners of his eyes: "This article is from the "Daily Zhilu" written by my mentor Sun Dan, and the title is "Two Rivers Guan See". Today is Mr.'s last lesson, but it's a pity, it's a pity, that I, an unsuccessful disciple, can only recite his old man's words in prison, and I can't see Mr.'s voice and smile. This is the last lesson."

In fact, "Two Rivers Guanjian" is a work by Pan Jitao, a famous river ruler in the last years of Jiajing in the Ming Dynasty, and this book was later included in the "Siku Quanshu". When Sun Dan saw this book on the Internet, he thought it was a little interesting, and through this book, he could intuitively understand how the ancients mobilized the power of the country to fight natural disasters, so he downloaded it into the hard drive.

When copying "Daily Knowledge", Sun Dan simply added this "Two Rivers Guanjian". Anyway, the "Daily Knowledge" is an encyclopedic work, and the strategy for governing the river is beneficial to the country and the people, so it should be published and sold so that more river officials can learn it.

Gu Tai stood up abruptly and bowed his hand deeply to Lu Fang: "Gu Tai just lost his words and offended Mr. Sun, and when he saw Mr. Sun Jingyuan's knowledge, Xiao Gu Tai knew that he was just a summer worm who didn't know anything before!" ”

Changfang calmly accepted Lord Gu's salute and nodded: "It's not Lu Fang who takes the big gift, I accepted this gift for Mr. ”

Gu Dadao: "With Mr. Sun's knowledge, I naturally received this gift from Gu Tai, but it's a pity that I am in Tugu and can't see Mr. Jingyuan's demeanor, this is really the biggest hardship in the world!" ”

Everyone in the prison sighed: "I can't imagine that Sun Jingyuan is so proficient in four affairs, and he is very talented."

Gu Tai asked again: "Mr. Sun's book says that you can't plant trees on the embankment, but the trees have the purpose of fixing sand and binding soil, so why doesn't he agree with it?" Lu Fang said: "It is said in "Two Rivers Guanjian" that most of the trees that can grow in the two river basins are poplars, thorns and the like. These trees have a short growth period and reach maturity in three years. Unfortunately, because it grows quickly, it is also prone to decay, and once the roots of the tree rot, a dam will also decay

Gu Tai suddenly realized: "Hey, why didn't I think of this place before."

Lu Fang smiled and was about to continue chanting, when a prison man walked in and said loudly: "Adults, don't make trouble, it's noon, save some strength to eat!" ”

It was noon, and Mr.'s class was "finished". Lu Fang's face changed, and he suddenly spit out a mouthful of blood, and cried bitterly: "I hate to serve by Mr.'s side, even if I die, I am willing." ”