"Oh, is it?" Yang Zheng said to himself: "When Archimedes was studying, he was inspired by the boom used by Egyptian farmers to carry water and the crowbar used by slaves to pry stones, and found that a lever could be used to achieve the purpose of saving effort, and found that the longer the distance from the place of the hand to the fulcrum, the more effort is saved. From this, he came up with the theorem that the relationship between the force arm and the force (weight) is inversely proportional. This was the principle of the lever, for which he wrote to King Heniloh: 'I can move anything of any weight without much effort, and if I am given a fulcrum, given a lever long enough, I can even push the earth.' That big ship was the first "earth" he pushed with a lever. Speaking of this, he sighed lightly, and his tone was a little hoarse: "Actually, in fact, in this world, in addition to poetry and songs, piano, chess, calligraphy and painting, there are many things that we have not seen, and we have never even thought about in this world. Economics, geometry, have you ever thought that these studies can strengthen our knowledge, vision, and our country, have you ever heard that science and technology are the primary productive forces......?"

Everyone on the field, you look at me, I look at you, no wonder they are surprised, it is really Yang Zheng's words are too surprising, what physics, chemistry, natural science, geography, psychology, economics, geometry are all unheard of, unseen, it makes the lively and boiling house in the past become extremely quiet.

Zeng Heling and Xing Kuan's faces were a little ugly, they were champions, they were familiar with the Four Books and Five Classics, and they were proficient in poetry and songs, piano, chess, calligraphy and painting, and now they were champions, how could they be regarded as the most talented and learned people, but today in front of this guy, his full stomach of knowledge accounted for less than half of the cheapness, not to mention, he also heard from his mouth that this was unheard of, that is, the lever theorem just mentioned, what kind of water buoyancy, he was not convinced, but he was very impressed in his heart, and he was surprised but forgot to question.

Zeng Heling and Xing Kuan's faces were a little ugly, they were champions, they were familiar with the Four Books and Five Classics, and they were proficient in poetry and songs, piano, chess, calligraphy and painting, and now they were champions, how could they be regarded as the most talented and learned people, but today in front of this guy, his full stomach of knowledge accounted for less than half of the cheapness, not to mention, he also heard from his mouth that this was unheard of, that is, the lever theorem just mentioned, what kind of water buoyancy, he was not convinced, but he was very impressed in his heart, and he was surprised but forgot to question.

In the silent house, everyone, you look at me, I look at you, and finally their eyes fell on Yang Zheng's body, looking at him like a monster, and after a while, a Shu Jishi stepped forward and said: "Lord Yang, you say that these knowledge, can you really protect the family and defend the country?" Yang Zheng followed the prestige, and when he met Yang Zheng, there was a young student with clear eyebrows and beautiful eyes, and when he looked at Yang Zheng, his face was full of admiration, as if he was the unique champion of this Hanlin Academy.

Yang Zheng said seriously: "Of course, do you remember what I just said about Archimedes?"

Na Ji Shi nodded and said, "Remember!"

Yang Zheng said: "He has mastered physics, mathematics, geometry, mechanics, static mechanics and hydrostatics to make feats of defending the country again and again!"

"Really, can you tell us about it?" said the gentleman.

"Yes, Lord Yang, tell us about Archimedes, we want to hear how he defends his family and country!" everyone also said in unison. "Okay, I'll take the opportunity to teach you a lesson, otherwise you sit in the well and watch the sky and don't know when? What hope do I have for Daming! If I can change the cognition of Daming readers, it would also be a good feat!" After making up this idea, I sorted out the story of the great Archimedes in my previous life in my mind, but fortunately, he was still interested in physics at that time. Newton's deeds of mechanics, so it didn't take much effort to talk about it now, so Archimedes used the principle of levers to create a kind of stone throwing machine called a stone crossbow, which could throw large stones at the Roman army's warships, or use a launcher to shoot spears and stones at Roman soldiers, and any enemy who approached the city wall could not escape his flying stones or javelins...... And the glorious deeds of building a huge crane that could lift the enemy's warship into the air and then fall down so hard that the battleship would be shattered on the surface of the water? In order to increase the sense of realism, he also focused on the glorious deeds of Archimedes who used the mirror to concentrate the light and retreat from the enemy, these scientific deeds were already extremely inflammatory, and he intended to teach everyone a lesson, so it was inevitably exaggerated, and everyone listened to it as if they were fascinated, and they praised Archimedes as a genius.

Yang Zheng took the opportunity to say: "Actually, these are not difficult, as long as you master physics, mathematics, geometry, mechanics, static mechanics, and then think about it carefully, you can also make these things?"

Before everyone could answer, they heard Yang Zheng continue to say loudly, "Have you ever thought about it, maybe you can recite the Four Books and Five Classics for a lifetime, and you can memorize the Four Books and Five Classics upside down, but how useful it is for the country and the people, compared to those levers, mirrors to gather light, and stone throwers are more useful, I don't think so, poetry and songs, piano, chess, calligraphy and painting are small ways after all, no matter how good the poems are, no matter how well the calligraphy and paintings are written, it is just that I licked a few poets and painters for Daming, what are the benefits for the country and the people, but chemistry, natural science, Geography, Psychology, Economics, Geometry, Physics...... And so on is very different, we can use them to make more advanced weapons, when the enemy attacks us, we can use them to defend the country, we can also use them to help the people transform the farmland, make simpler, less labor-saving farming tools, help them improve and get a greater harvest, so that they can have enough food and clothing...... Tell me, are these important ......?"

After Yang Zheng finished speaking, he didn't feel out of breath, and then looked at everyone full of envy and surprise, even Xing Kuan and the others were no exception, and they couldn't help but take a breath again, and continued: " There are still a lot of things to learn in this world, and there are a lot of useful things, we shouldn't just stay at the piano, chess, calligraphy and painting, poetry and songs, which will only make us short-sighted, not pay attention to reality, and immerse ourselves in the beautiful scenes outlined by literati and ink writers, so that there is no half benefit to yourself and the imperial court, you are the pride of the sky, the first-class talents of the Ming Dynasty, don't you want to give the Ming system a few advanced weapons to protect the family and defend the country?"

"Think!" everyone couldn't help but say loudly.

Yang Zheng was very satisfied with everyone's expression, nodded and said, "Very good, then what should we do?" Whetting everyone's appetite, Yang Zheng smiled and said: "From now on, we must start to learn science, master science, let science enrich our brains, let science make our bodies work, and let science help us strengthen our country and people, and become a first-class power in the world!"

"Okay!" Everyone was better than to fall, and after a long time, one of them said: "Where can we learn these sciences?" Yang Zheng said: "Good question." In ancient China, there were many scientists, who made brilliant achievements with their careful observation, unremitting efforts, and far-sighted vision, such as one in the "Great Dai Li Ji", which was later circulated in a separate volume. According to research, the text is only more than 400 words. As far as astronomical knowledge is concerned, it describes the astrological signs of each month in the order of twelve months, such as the stars that appear in the south in the morning and dusk, the pointing of the dipper, the position of the Milky Way in the sky, and where the sun has arrived among the stars. In addition, there are monthly meteorological and phenological activities, as well as agricultural and political activities that should be done. For example: "New Year's Month, Enlightenment,...... Ju then sees, in the early dusk ginseng, the bucket handle hangs underneath,...... "Here" Ju" and "ginseng" are both star names, and the "bucket handle" is the spoon-shaped handle of the Big Dipper. Whether this book is an almanac of the Xia Dynasty or not, the academic community has not yet decided, but it has been written in the Spring and Autumn Period at the latest, and according to the astronomical phenomena reflected in the book, this is the earliest astronomy, and Mozi, he is not only a skilled craftsman, but he also went deep into the field of science, did a series of scientific research and scientific work, and made many important achievements. At the same time, Mozi attached importance to science and technology rather than science for science's sake, he closely linked science and technology with his own political ideas, used scientific and technological knowledge to enrich and enrich his own doctrines, and used them as a powerful weapon to promote benefits and eliminate harms, and to serve his political ideas. The reason why he was able to stop Chu from attacking the Song Dynasty, in addition to his outstanding eloquence ability, was mainly because he had the most advanced siege equipment at that time, when the king of Chu relied on the siege equipment like a public defeat and insisted on attacking the Song State, Mozi demonstrated the offensive and defensive equipment and tactics in front of the king of Chu and the public defeat, after nine encounters, the siege equipment and tactics of the public defeat were thwarted by Mozi one by one, and the siege equipment of the public defeat was used up, but Mozi's defense equipment was more than enough, which forced the king of Chu to give up the plan of attacking the Song Dynasty. If Mozi did not master science and technology, then no matter how good he was at reasoning and arguing, he would not be able to stop the king of Chu from attacking the Song Dynasty. This example reflects Mozi's ability to use science and technology to serve his own political ideas. In addition, there are, "Zhou Ji Sutra", "Nine Chapters of Arithmetic", "Sun Tzu Sutra", "Five Cao Sutra", "Xiahou Yang Sutra", "Sun Qiu Jian Sutra", "Island Sutra", "Five Classics of Arithmetic", "Fixation", "Ancient Computer" Mathematical Masterpieces, Northern Wei Dynasty, Geographer Li Daoyuan's "Water Classics Note", Tong Guò for the ancient book "Water Classic" annotation, to "Water Classic" As the outline, it comprehensively and systematically introduces the physical geography and economic geography of the area through which the waterway flows, and is a comprehensive masterpiece of high historical, geographical and literary value, and the Northern Song Dynasty scientist Shen Kuo's "Mengxi Writings", which are all sciences, including astronomy, geography, mathematics, physics, chemistry, As long as we study attentively, observe carefully, dare to test the truth with reality, and don't sit in the well and watch the sky, then sooner or later, you will be my Archimedes, and you will become a giant of science and be ......admired by all ages."

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