I accidentally took in two princesses, but unexpectedly picked up two treasures, one for each, collectively called the baby.
So Li Qinzai became serious. He wanted to teach Princess Xuancheng seriously and teach him everything he had learned in his previous life.
Of course, Li Qinzai has now forgotten much of what he learned in his previous life. He can only teach his disciples the parts he remembers. As for the forgotten blank parts, later generations will fill in them.
The world is so big, and there are so many talented people throughout the ages, there will definitely be those who come after Li Qinzai. What Li Qinzai has to do is to form a fixed system for all knowledge. No matter how much is left out, as long as there is a system, it will be for future generations.
A window opened.
In the quiet courtyard, Li Qinzai sat with Princess Xuancheng, teaching her step by step how to solve quadratic equations of one variable.
Princess Yiyang tied two heavy sandbags to her legs and squatted on horseback not far from them.
It didn't take long for Xuancheng to understand quickly. Li Qinzai was a little surprised, so he asked her a few questions. Xuancheng solved them with just a few clicks, and the answers were completely correct.
"Yes, you are very talented." Li Qinzai praised for the first time.
Li Qinzai had done too many things to ridicule students, and suddenly praised them. Li Qinzai was not used to it, and his tone was very stiff, as if someone put a knife on his neck to force him to praise others.
The compliment lacked sincerity and Xuancheng didn't seem to show much pleasure. Li Qinzai had to emphasize his tone and said: "You are the most talented among all my students. Don't waste your talent."
Only then did Xuancheng laugh. With her introverted personality, she looked like an orchid, waiting for the spring breeze, its branches and leaves unfurling in the wind.
"Sir, I don't understand, what is the use of learning mathematics well?" Xuancheng said in confusion: "It is not the scriptures of sages, and most scholars in the world will not learn it. If the disciple can learn it, he can use it to make writings.
What?"
Before Li Qinzai could speak, Yiyang, who was squatting on horseback not far away, suddenly scolded: "Sir, if you want you to learn, you can learn. Your knowledge is extraordinary. So many powerful people in Chang'an City have sent their children to your sect. If your knowledge is useless, they will
Will they flock to each other like ducks?"
After Xuancheng was scolded by Yiyang for a few words, he lowered his head and did not dare to say anything.
But Li Qinzai smiled and said: "It doesn't matter, the truth must be understood clearly, otherwise you will study without knowing the goal of learning, and you will give up due to confusion when you learn."
"The scriptures of ancient sages and their meanings are based on Mingde. Mathematics and physics can make a country prosperous. This is the meaning of me teaching you these two subjects."
Xuancheng opened his eyes wide: "Can these questions composed of numbers and symbols prosper a country?"
"It can, and is the most important way to prosper a country. If you know the principles of everything in the world, you will know how to change it and use it to benefit the world, and even a city or a country."
"When the Tang Dynasty attacked the enemy, how far away could the trebuchet accurately hit the city head? What kind of arc would it draw in the air? How many weeks would it take for the winch to turn to perfectly throw the boulder into the enemy..."
"Limestone is obviously an ore that can be found everywhere, but why does it turn into impregnable cement after being burned in a kiln for a few days..."
"When a craftsman builds a house, he can't throw the stone bricks onto the beams that are 10 feet high even if he uses all his strength. However, if he carries the bricks and spins them around twice before throwing them, he can easily throw them up. The principle of centrifugal force can save a lot of labor.
physical strength and time..."
Li Qinzai looked at her with a smile and said: "What you see are phenomena, but our knowledge is to study the principles through this phenomenon."
"If there were ten thousand people in the Tang Dynasty who understood the principles of all things, then you would find that the Tang Dynasty gradually had machines, lathes, vehicles, and invincible weapons that could replace human power."
"This is the significance of learning this science. It uses principles that people have never discovered to cleverly liberate manpower and material resources, allowing the machines to work instead of people, and people can live more leisurely or engage in more
Important work.”
"A country often prospers like this, and this prosperity can continue for thousands of years. Even if it encounters war and death, it can quickly rebuild on the ruins and restore its previous civilization."
Xuancheng was fascinated by what he heard, holding his chin in his hands and staring at Li Qinzai infatuatedly.
Even Yiyang, who was squatting on horseback, was attracted. His half-crouched legs seemed to feel no pain, and his mind was filled with the prosperous scene Li Qinzai mentioned.
"The Tang Dynasty...will there ever be such a day?" Xuancheng said longingly.
Li Qinzai sighed: "There will be, but I may not be able to see it in my lifetime, and you may not be able to see it. The scene I just mentioned requires the efforts and inheritance of several generations, as well as the right time, place and people."
"More importantly, my knowledge needs to be carried forward and passed on from generation to generation, making it more perfect and progressive, and allowing for a deeper understanding of the principles of all things. If it is a fire, it needs to be passed down from generation to generation and will last for thousands of years.
, our world will eventually become different.”
Yiyang couldn't help but said: "But Sir, why do disciples feel that Sir is not very attentive to teaching disciples? You...are often absent from class."
Li Qinzai said without thinking: "Because Mr. is lazy."
The two princesses were dumbfounded. Can the excuse of laziness be used so openly and confidently?
"Sir, you are not a sage. You are only responsible for teaching students knowledge. As long as I teach you the right knowledge, even if I am ill, you will still have to bow respectfully when you see me. Do you understand?"
The two princesses looked puzzled, always feeling that there was something wrong with this explanation, but on the surface it did sound somewhat reasonable.
Xuancheng stood up and bowed respectfully to Li Qinzai: "Sir, this disciple will work hard to learn well and pass on your knowledge from generation to generation."
Yiyang Qing knew that his talent was not enough, and he didn't know how to express his position for a while. Qiqi Ai Ai took a long while and said: "Disciple... will protect you."
…………
It has become a bit chilly after autumn, and the leaves in the yard have turned yellow and fallen.
Taking advantage of the fact that the weather was about to turn cold, Li Qinzai stewed an old hen for the family of three to take a tonic to gain some fat for the winter.
Li Qinzai's attitude towards life is obviously much more serious than his career. This is a person who lives a practical life.
The monarchs and ministers in the court are already awesome enough. Without him, it would not affect the Tang Dynasty's dominance in the world. Li Qinzai can just lie under the big tree to enjoy the coolness. If he does not cause trouble in the process of the Tang Dynasty sweeping across the world, he has made a contribution to society.
.
The chicken is stewed and is delicious. After simmering it for two hours, the chicken soup has thickened into juice.
The family of three ate happily. Qiao'er had two chicken drumsticks to herself. After finishing the meal, she wiped her mouth, bowed to the two of them, turned around, and ran out to play.
"Come back! Take out the slingshot and confiscate it." Li Qinzai said.