Jiang Tian once again stood on the podium, but this time it was not an amateur place like a teahouse, there was a wooden board painted with black paint behind him, and there was a later-style podium in front of him, and there was naturally a standard Taishi chair behind the podium, and there were no less than fifty students sitting in the classroom. The moment he walked into the classroom, the students all stood up and bowed to him.

Although I didn't hear the classic "Hello teacher! However, seeing them bending down respectfully one by one, Jiang Tian's vanity was also slightly satisfied: "Students, please take a seat." ”

The sound of the clattering chairs was endless, and after a while it quieted down, Jiang Tian glanced at the students, here is the advanced class that has been studying here for more than two years, and it is also the first batch of seeds to receive science education before the establishment of the Chinese Dynasty, although many people are forced to come in by the elders of the family, but there are still many ordinary students who are very interested in science, or transfer to science for their livelihood. There are also many familiar faces here, such as Song Yi and the three of them, and the fake prince is also inside, and if you look closely, Huan'er is also among them.

Jiang Tian casually flipped through the roster of students, and saw that there was no Huan'er's name in it, so he asked: "Wu Gongzi, it seems that my cousin Ling is not among them!" ”

The people among the students who knew the inside story were all glancing at Wu Yuan, and there were no more than ten people in the entire class who knew Zhang Huan's identity, and they all received special advice, there should be no one who revealed the truth, otherwise the consequences would be borne by themselves, now see how the fake prince answers.

Wu Yuan thought that Jiang Tian would have such a question, so he stood up and replied: "Sir, I don't know, Huan'er has just come to Beijing, and he really didn't study in the Imperial Academy before, but after the summer vacation, he has already passed the entrance exam, and his grades have been placed under your jurisdiction." ”

Jiang Tian nodded, it is very common to transfer schools or something in the later life, this is not worth making a fuss about, and with his own understanding of this child, his personality of asking why he has to ask everything, the knowledge he has mastered may indeed exceed the admission standard, plus his cousin is in this class, even if he goes through the back door, it is not difficult. So Jiang Tian didn't ask more, but added the word Zhang Huan to the roster.

Jiang Tian, who restarted the class, didn't have any extra nonsense, threw the textbook on the podium, then turned around and picked up a piece of chalk that looked like quicklime cut out, and wrote Jiang Tian's two words on the blackboard: "Some of you know me, and some of you have just heard of me, I was not the teacher who explained elementary physics to you this semester, but I don't know why I became your teacher, I have roughly read your textbook The difficulty is very low, What I am going to explain in the future may not be the same as what you have always known about this world, but it doesn't matter, as long as you learn what is in the books in your hands, you will find that there are more wonderful things in this world, and things that cannot be explained by common sense, are waiting for you......"

The classroom of this era has been transformed into the appearance of the future generations as much as possible by the emperor, but after all, the students are not those who have been systematically educated since elementary school, not only are they uneven in age but also have a strange understanding of knowledge, and the textbook compiled by the missionary and the emperor himself is also full of loopholes, Jiang Tian, who originally wanted to prepare for the lesson, threw the book directly into the garbage heap, and that thing is not even half the difficulty of junior high school physics, If it is said that some extracurricular reading materials for primary school students in later generations are better than this. Therefore, Jiang Tian just explained according to the course context of the original book, and as for how to make the students understand, it was completely up to him. So he asked his students to take notes in class, which would be the basis for the new textbook.

The morning class is finally over, whether the students understand it or not, they have already understood that the emperor's junior brother is indeed worthy of his name, although the first day is only a simple definition of the principles of physics, and a simple explanation of some of the physical knowledge contained in life, but only these have surpassed the understanding of the world in this era, for some talented students, under the description of this gentleman, as big as the stars and the birds, as small as the leaves and insects, it seems that a qiē and a qiē have been masteredSome people even think that the earth is just a plaything in the hands of this gentleman, and every secret of it is nothing more than a common sense that can be explained into the laws of physics in the eyes of the gentleman.

Zhang Huan thought so, he originally admired nothing more than his father, the founding emperor was not only good at marching and fighting, but also participated in the improvement of many firearms in the army, it can be said that China has been a rare all-round emperor for thousands of years, if you have to find a similar example in history, it seems that only Zhuge Liang, who is respected as a god, can match one or two. But today, Zhang Huan keenly found that all the courses he audited during the summer vacation were a waste of time, and Jiang Tian did not play his real level at all, not only did the content of the explanation have nothing to do with each other, but even the truth in it was simply passed by. Until now, it may have been his father's order, or he felt that he should teach seriously, so he used his real kung fu. It is no wonder that my father told me that I should memorize Mr. Jiang's courses carefully whether I understand them or not, and even if I can't understand them now, I must imprint them in my mind like reciting "Analects" and "University", because this is related to whether China can be proud of the world in the next 300 years! If the mysterious gentleman who learned to be rich first taught his father how to win the war, and then taught Jiang Tian the principles of all things in the world, then what he Zhang Huan admires most now is this old gentleman who has become an ancient.

"Sir, sir!" Seeing that Jiang Tian was leaving, Zhang Huan hurriedly ran over: "The student still has something unknown!" ”

Among all the students, Jiang Tian has the most headache for this child, and it is a good thing that he is curious, but he always asks something that cannot be explained in a few words, but he can't be perfunctory in line with the duty of a teacher: "Oh? Today's is just a general explanation, why don't you know? ”

"Sir just said that everything in the world has its own reason, but many of us don't know it yet. According to what Mr. said, if you learn this physics well, will you be able to promote peace and security in the world? ”

Many students pricked up their ears, including people like Liu Baokai, they all knew the emperor's evaluation of Jiang Tian, and many old guys who were born and fought to the death were a little unconvinced, why is he an indispensable pillar of China in the future? Now that Zhang Huan, the real prince, has asked this topic, many people want to hear his answer.

Jiang Tian just smiled when he heard it, fortunately, this kid didn't dwell on academic issues: "No knowledge can guarantee the peace of the four seas in your mouth, the matter is man-made, if the hearts of the people are ancient, then we still live in a grass shed and live a tribal life, and there will be no so many troubles." Confucius wanted to end the strife by educating the peoples, but we have never stopped fighting for 2,000 years. Now, if you want to use science to create a peaceful and prosperous scene in the mouth of the sage, you will only be dragged into the abyss by one new problem after another. The only way to make the world peaceful is to make people no longer greedy, but if the human beings in the world really have no greed, the world will be hopeless. ”

After saying this big set, Zhang Huan almost fainted, Jiang Tian seemed to answer his question, but he didn't seem to say anything, except for a few older and more experienced students, everyone else felt that this was fooling the child. Jiang Tian really didn't mean to be fooled, because this is the true portrayal of human beings so far, it is precisely because of greed that there will be progress and strife, whether it is Confucianism or Buddhism, the world they expect is just a dead and unchanging society, unless the evolution of human beings comes to an end, otherwise such a society will never appear. The kind of people who fantasize that the country will remain unchanged for a long time will not only fail to become a good ruler, but also cannot be a qualified politician.

After a morning of lectures, Jiang Tian's stomach was already rumbling, he didn't expect that just sitting there and talking would consume his body so much, but he forgot to bring lunch without work experience. Sitting alone in an empty office, I thought I can't starve to death in the Academy of Sciences, right? So I got up and went out to find out if there were any restaurants nearby. Just as he opened the door, he happened to see Song Yi leading the two girls towards this side, and when he looked closely, he found that it was Xinyue and Xiyun.

"The students heard that the two girls were worried about Mr. and led the way to meet them." Tong Guò studied the concepts of physics in the morning, and Song Yi became more and more respectful.

The home is not close to the Academy of Sciences, how did these two people find it: "You are ......?"

Xinyue is still so calm, even if she takes off her silk and satin to dress up as a servant, she never hides her temperament: "Xiyun remembered that her husband went out in a hurry and didn't bring food, so she begged the slave maid to bring her here." ”

As he spoke, he pushed Xi Yun to the front, and didn't forget to show a small food box. Jiang Tian smiled bitterly when he saw it: "Silly girl, you passed through the entire Beijing city in order to deliver food?" ”

Xi Yun just lowered her head and rubbed her fingers, not daring to look directly at Jiang Tian. Seeing this atmosphere, Song Yi turned around and left with interest, and Jiang Tian had no choice but to take the two to his "clean" office. There were no outsiders present, and Jiang Tian sighed at this time: "You guys are really, now everyone in Beijing is staring at me, and tomorrow there will be gossip about "Ermei delivering food" in the streets and alleys." One more thing, you are all free now, stop calling yourselves slaves. ”

Xinyue thought that this was indeed the truth, but she was also a person who could grasp the measure: "Sir, don't worry, we are hiring a car to come, no one should pay attention on the road, and besides, I am still a subordinate of the Jiang Mansion today, why is it wrong to send food to the master?" But what if you don't call yourself a slave? ”

Jiang Tian blurted out without thinking about it: "Since you have been denaturalized, if you want to change back to your original name, you can do it, I don't know what Miss Xinyue's real name is?" ”

Xinyue hesitated, then looked at Xinyue, who was also curious, and said that you can still be indifferent, if a girl can report her name to outsiders, it is a great trust: "Slave...... The little woman's original surname was Feng, and her maiden name was Wanxiang! ”

"Feng Wanxiang!" Jiang Tian silently recited a few times: "This name is very good, then I will call you Miss Feng from now on." ”

Wanxiang felt a little lost in her heart, this Miss Feng sounded as close as Xinyuelai, and I don't know if this Jiang Dacai really didn't understand or pretended to be stupid.

After lunch and sending the two girls away, Jiang Tian began to get bored again, there was no class for him in the afternoon, so it was time for scientific research until he got off work. But the depressing thing is that he now has no clue about the development of lead type, and few people have used movable type printing technology in the era he has crossed, but he remembers that he seems to have heard that lead type is actually a lead alloy, but he has no clue what kind of alloy he has, and he is not a metallurgical major, and he has not studied how to manufacture products that have been eliminated.

Now that I think of the time-traveling protagonists in many novels, they can always invent something that can reverse history at critical moments, regardless of whether it is technically feasible or whether the protagonist himself has knowledge of this area, in short, the author can write whatever he wants. But after I really crossed over, I found that those things that seemed incomparably simple in the later life were all high-end things that were difficult to replicate in this time and space. He had this experience when he was involved in the development of telescopes. The progress of science and technology and the invention of products are complementary to each other, for a long time, China's scientific and technological progress has relied on the accidental invention and creation of a certain ingenious person, and it is completely blank in theoretical knowledge, which is like we invented the compass, but do not understand why the magnet can guide. We invented gunpowder, but we don't know why it can explode. If the European Renaissance was able to finally surpass China and lay the foundation for Europe to win world hegemony, it is that since then, European academic research has begun to develop in the direction of formalization and theory. Thinking of this, Jiang Tian felt even more that the emperor's predecessors had good intentions, and he figured out that Guò would build a school with science as the main training direction to drive the change of Chinese style of study. And to allow ourselves to teach in it, also considering that China does not have the time to accumulate as slowly as Europe, we must ensure that we are ahead of Europe for at least a few decades, and initially establish a complete new education system. In the process, advances in printing technology meant that more inexpensive books could be produced for education.

Since he couldn't guess the formula of the alloy, he had to list all the known elements, fortunately, Jiang Tian's basic skills were relatively solid, although he had thrown down the books for many years, but in order to get good results in the exam, he lived an inhuman life in the exam, so he quickly wrote a long list of characters on a piece of paper: 1 hydrogen, 2 helium, 3 lithium, 4 beryllium...... Jiang Tian didn't expect that he would have the opportunity to write the periodic table of chemical elements silently after graduation. The unbearable past of those years is vivid. I have cursed China's examination system more than once, that is, as long as foreign undergraduate graduates are not engaged in this major, they have not memorized the periodic table, right? Why do Chinese students have to suffer this foreign crime? It's just that after dictation, it's still a little unintuitive, so he found another piece of paper and drew it for a long time to recall the appearance of the periodic table in the future, and then it was done. This paper was later revised, most of the contents were hidden, and it became a treasure in the Science and Technology Museum. In the early days of the Chinese Dynasty, most of the elements on the table had not yet been discovered, and Jiang Tian could not name every imaginary element he had never met, but he was still revered as the father of the periodic table of chemical elements.

Looking at the periodic table of chemical elements in the 21st century, Jiang Tian thought for a long time and still had no clue, the appearance of lead movable type was relatively late, but from the perspective of its large-scale use, it should not be fused with some extremely expensive and rare metal, otherwise it could not become the most widely used printing technology before the emergence of laser phototypesetting technology. In fact, if he didn't dwell on movable type printing, Jiang Tian still had a way to update the existing printing methods, such as the mimeograph technology that had accompanied him in his growth.

Jiang Tian, who had made up his mind, found Song Yi and asked directly: "Dexin, do you think that I am also a vice president as a brother, I don't know if there is a long-term follower and follower?" ”

Ordinary students only have half a day of classes every day, so they naturally do whatever they need to do after class. Only Song Yi mostly had to stay in the Academy of Sciences after class, because his grandfather always asked him to do something. This didn't make Jiang Tian block it today: "Sir doesn't know, originally there are naturally people like long-term followers in the yamen, but our academy is not ordinary, and the servants used are all loyal and reliable, so there are no redundant personnel, but if Mr. has any orders, you can inform me and so on." ”

Jiang Tian thought about it for a while, the Academy of Sciences' requirements for secrecy are definitely higher than those of ordinary yamen, so it is not realistic to take Zhao Zhi with him, because this kid may be difficult to pass the political trial. After thinking about it, he also knew that since he had taken over the scientific research project, he must make certain results, otherwise it would not be easy for the emperor to explain, so he simply said his thoughts. Who knew that after Song Yi heard this, his eyes shone brightly, and he immediately understood how simple the so-called mimeograph technology was.

"Sir, rest assured, the student has already understood, so I will arrange for a trial production, and if there is anything wrong, I will ask Mr."

Jiang Tian is also happy to be a hands-off shopkeeper, with his Song Yi's knowledge, if he can't understand such a simple thing, then where will the old man Song's face go? Therefore, Jiang Tian didn't have a more detailed chat with the other party, anyway, if he really encountered a problem, it would be better to click on it himself. Although it is very different from the lead type mentioned in the holy decree, if a simple and inexpensive printing method can be developed, even if the effect is slightly worse, it can be regarded as a partial completion of the task. As for the alloy formula of lead movable type, it can only be explored slowly. Just when he was about to pack up his things and go home, he happened to see a stonemason repairing the steps, this Guozijian said that it had been built for more than two hundred years, and many places really needed to be renovated, which was a very normal thing, but it made Jiang Tian feel good.