After the Lantern Festival, the biggest thing that happened in Chang'an is, of course, that Chang'an Academy opened, although the school started after the festival is the next semester, but the spirit of the students going to school is already different, the credit system allows students with higher understanding to have the possibility of rapid advancement, and when they see the junior students, their eyes are different.

This year, Chang'an Academy will usher in the first batch of junior high school students, the number is not large, but they are already famous prodigies in Chang'an City. Because junior high school will teach advanced knowledge of mathematics, physics and chemistry, which was not available in the previous education system of Datang, even if it is only the knowledge of mathematics, physics and chemistry in the first grade of junior high school, it has made these junior high school students understand a lot of truths that others do not understand.

Yang Lin came over with his three aunts today, and Li Zhi didn't need him to bring it at all, that kid planned to finish all the content of junior high school in half a year and upgrade to high school.

Registration office, when I learned that Yanglin brought over three princesses who had no new teaching knowledge base, the teachers of the first grade of primary school were stunned, this could not be taught, there was no basic knowledge learned last semester, it was impossible to receive the knowledge of the next semester, unless it was an art class, the first three years were the foundation of learning, the children were young, it didn't matter if they were half a year late, just leave one more level at that time, as for cultural knowledge, they can only be slowly made up later.

Well, in the disgusted eyes of the teachers, the three princesses still handled the enrollment, and the news that the art class came to the three little witches who could not be provoked soon spread in Chang'an Academy, because of the enrollment of their three princesses, it also caused a trend of the children of the nobles of Chang'an City attending art classes, and I don't know if I really want the children to learn art, or I want to take the opportunity to get close to these three little princesses.

After arranging the enrollment of the three sisters-in-law, Yang Lin finally walked into the office of his Chang'an Academy, and not long after he sat down, a familiar figure rushed in, Gu Yue Daowen, the old guy who had been planning a physical chemistry experiment class for a month, was about to start, and it was also a public lecture on the playground, and there was a hot air balloon launch experiment in the middle, and he came to ask Yang Lin to check with him.

"Are you sure you want to teach the kids how to make a hot air balloon so early?"

After getting the confirmation of Yanglin a few years ago, Gu Yue Daowen quickly began to do hot air balloon experiments, this kind of non-technological thing was of course tried by him, and reported to Li Shimin at that time, and Li Shimin, who roughly understood why the hot air balloon flew into the sky, naturally asked Gu Yue Daowen to crack the principle of the Tianshen spaceship as soon as possible, and even asked the craftsman to prepare the materials for the emperor's own spaceship, after all, nominally the Tianshen is still Yanglin's private property, and the person who piloted the spaceship was also sent to him by Yanglin, And when he wants to use it himself, he always has to look at Ji Xuan's face, after the concert, Ji Xuan's old guy is simply gone, and no one can open the Tianshen parked in the Imperial City School Yard now, if Guyue Daowen can build a spaceship by himself, it will be different, Li Shimin can drive a self-produced spaceship and play around Chang'an City at any time.

"Of course, if my spaceship wants to really fly in the sky, it can't do without the help of these students in the academy, only if they know how to calculate the power, energy, fuel and mileage comparison, etc., I can form a crew, and building a spaceship is a new task given to me by the emperor, if I want to complete the task as soon as possible, I have to select a group of people from among them to study this professionally."

Yang Lin saw that what Gu Yue Daowen said seemed to be very reliable, so he nodded and followed, the civilian spaceship was decided to be made when he was in the Western Regions, and this task could not fall on the underground base, so from manufacturing to use, it was necessary to train a group of people for the imperial court, and the most basic condition for this group of people was to complete the full set of courses in the junior high school of Chang'an Academy.

The students' enthusiasm for new technology has reached an irrepressible level, I have to say, the level of Datang on stealing the limelight, in addition to Guyue Daowen, there is no second, of course, like Yanglin, a mysterious person who rarely appears on campus, is also a god-like existence in their minds, when Guyue Daowen and Yanglin's figure appeared on the temporary podium in the center of the playground, it immediately attracted thousands of students to shout tsunami-like applause, Guyue Daowen was fully prepared, and even the speaker equipment was used, What made Yanglin even more surprising was that Li Shimin actually took a few eunuchs and hid among the students.

"Quiet, quiet, everyone knows what I'm going to talk about in this class, so now, let's start with the composition of air, can anyone tell me what the elements of the air that is ubiquitous in the world are made of?" Gu Yue Daowen stood still on the podium as if he was like this, and immediately threw out a question, this content is what the first page of the chemistry textbook that the first year junior high school students just got, and the students who have read the textbook in advance naturally know how to answer, and they all raised their hands. "Teacher, the first page of the new textbook says that the main components of the air are nitrogen, oxygen, and carbon dioxide, and there are some rare gases, carbon monoxide and water vapor, which have more than ten components. The student who was pointed up by the Gu Yue Dao Wen was already an eye-catcher, not only answering the question of the Gu Yue Dao Wen, but also taking the opportunity to raise his own questions, of course, if he was more eye-catching and understood the entire content of the first lesson, he would not have asked such a question.

"This classmate asked very well, so let's first talk about what is the most important thing in life in the world, is breathing, anyone who stops breathing, will soon die, that is to say, the human body needs some components in the air to maintain its own life, after our continuous verification, we found that it is oxygen that maintains the blood operation of the human body, so when we master how to extract oxygen, the medical school has been able to provide critically ill patients with air with a higher oxygen content than the air to them, It's easy for them to keep their bodies functioning······"

Since the beginning of the course of Guyue Daowen, Li Shimin's eyes have turned around with a circle pattern, on the other hand, thousands of students listened to it with relish, looking like I understood, Li Shimin was very ashamed, but he also found an acquaintance in the crowd, that is, his son Li Zhi, the king of Jin, Li Zhi did not listen to Guyue Daowen's lectures with relish like many students, but turned through the books by himself, he is one of the few second-year junior high school students, that is, he has mastered all the knowledge of the first grade of junior high school, Of course, he is very clear about these elementary theoretical knowledge.

Li Zhi's performance aroused Li Shimin's curiosity, and he slowly leaned in his direction from behind, and at the end, he put on a strict father's posture and whispered: "Xiaozhi, Mr. Gu Yue is talking about the university between heaven and earth, why don't you listen carefully?" ”

"The son visits his father." Li Zhi was not surprised by Li Shimin's appearance, but now he is still a teenager, since he quarreled with Li Shimin, he has already determined Li Shimin's political mistakes, and now he has no intention of forgiving him, so he said coldly.

"Father asked you, why don't you listen carefully!" Li Shimin was a little depressed, but Yan's father's appearance had already been dressed, so he naturally wanted to continue to pretend and said sharply.

"Erchen is already a second-year junior high school student, and Professor Gu Yue is talking about the first-year junior high school course, does my father think it is necessary for me to listen? Coming here, Erchen just wanted to see Professor Gu Yue's hot air balloon experiment. Li Zhi still looked half-dead, and on the podium, Gu Yue's sword text was spitting everywhere, as if it was none of his business.

"Second grade?" Li Shimin was stunned for a moment, he probably knew that the higher the grade in Chang'an, the deeper the knowledge, and immediately understood why Li Zhi didn't need to listen to the lecture, but he was the father, how could he let his son's words be blocked! After being stunned for a moment, Li Shimin said with a straight face: "What if you have learned, don't you know the truth of reviewing the old and learning the new?" ”

"Well, science knowledge is not a knowledge that pays attention to the past and learns the new, it is a knowledge that pays attention to the only truth, I'm afraid you won't understand it when I explain it to you, otherwise, you can register in the academy and learn it from scratch! Let's apply for the first grade of elementary school! The grade is too high, and it is estimated that you will not be able to study. Li Zhi's answer made Li Shimin stunned, the education he received since he was a child is the literary education of the ancient times, how can he understand the pursuit of the only law of science, and then the words were blocked by Li Zhi, Li Shimin deeply felt humiliated, but he was very happy in his heart, the more advanced Li Zhi's scientific and technological knowledge is, the better it is for Datang, so his expression at the moment is very complicated.

Finally, Li Shimin couldn't find any topic to talk to Li Zhi, on the podium, the course of Guyue Daowen also reached the climax stage of the experimental part, a huge airbag that had been sewn up was carried onto the podium by the teaching staff, under the airbag, there was a burning brazier, the brazier went down, in a bamboo basket of meters long and wide, a goat tied with four legs was bleating in the bamboo basket, as the brazier burned for more time, the more hot gas stored in the airbag began, and it began to bulge, after a while, The bulging airbags began to rise into the air, and the basket containing the goats was also hoisted by the airbags.

"Na Na Na, Zhuge Kongming in the Three Kingdoms period, it is because of the discovery of the principle that hot air will rise, and invented the Kong Ming lantern, now, we also use this principle, we can create a spaceship that can make people fly into the sky, you should know that there is weight in air, hot air is lighter than cold air, just like sun-dried wood will float on the water, so, it can also float in the air with a certain weight of objects, the most typical example is our Datang's Tianshen, That is my apprentice Heavenly Horse after precise calculations, to create a huge spaceship with a load of more than 1,000 stones, I believe you have also seen, this is the benefits that we have understood the composition of the air to bring us, today's first lesson is the end of this, students should seriously experience after class, remember the list of elements of air. ”

In the vigorous applause, Gu Yue Daowen smiled, waved his hand to the students and walked off the podium, the depressed Yang Lin looked at the hot air balloon flying farther and farther, ready to remind Gu Yue Daowen, you don't make a hot air balloon and tie it to the ground, God knows where it will fly, in case someone is killed by a goat falling from the sky tomorrow, who will be responsible? If you can't kill people, it's not good to smash flowers and plants! (To be continued.) )