Chapter 13 Gongsun Jianwu

We all know that the triangle relationship between three, four, and five is called Pythagorean theorem, also known as Pythagorean theorem. China discovered the Pythagorean theorem as early as the Shang and Zhou dynasties. The person who discovered it was called Shang Gao, so China called the Pythagorean theorem "Shang Gao theorem".

It is said that Dayu used the Pythagorean theories to control the water, which led to the ability of "controlling floods and rivers, looking at the shape of mountains and rivers, determining the height and the lower, eliminating overwhelming disasters, so that he could go to the East China Sea without any drowning. This is where the Pythagoreans are born." In the end, it will benefit the people.

We can tell the trilateral relationship of Pythagorean theorem without thinking about it. We just ask why this relationship is like this? It will definitely be stubborn because we use it as axiom.

China discovered it during the Shang and Zhou dynasties, but it was not until the Three Kingdoms that proved it by Zhao Shuang, a mathematician of the Wu Kingdom. The difficulty can be imagined. Zhao Shuang used the method of cutting, cutting, splicing and supplementing to prove the Pythagorean theorem, and was the first mathematician in Chinese history to prove this proposition.

The proof method Chen Wanrong saw was concise and clear, with few steps, which was similar to the famous "Gafeld" method. The proof method was very concise, and omitted many unnecessary steps compared to the previous proof method. There was such a similar proof method as early as the Tang Dynasty, and Chen Wanrong could not be surprised.

"Brother, what are you looking at?" Chen Zairong glanced at the cloth hanging on the tree in front of him, and explained to Chen Wanrong with a smile: "Brother, the scholar and lady came to the Wei River and talked about everything. They would occasionally do something else, just draw, write poems, and cultivate sentiment."

The social status of women in the Tang Dynasty was relatively high. Wu Zetian, Shangguan Wan'er, and Princess Taiping discussed politics in the court and opened up a generation of style. Ordinary scholars and women could not sit high above the temple like them. They usually went out to play, and they found something to do when they could speak, and they talked about the mountains. They said it was full and they had nothing to do. How to pass the time and play. Chen Zairong said it a little contemptuously.

Chen Wanrong pointed to the cloth piece: "Did you see, how concise and clear theorem proves to the Shanghara theorem? What kind of mind does this require?"

"Isn't this obvious?" Chen Zairong is not a science subject, and he has not yet understood how difficult it is to prove the Pythagorean theorem.

Chen Wanrong asked back: "Why are the three-strings, four-strings, five-strings, instead of the three-strings, four-strings, six-strings?"

Chen Zairong asked a question at once, and his mouth was wide open, and he couldn't close for a long time. He was stunned for a long time before saying, "Brother, why is this?"

"Look, the answer is written on the cloth." Chen Wanrong pointed at the cloth piece.

Chen Zairong looked at the cloth with his head on his head. He looked at the triangles and lines, so he touched his chin blankly: "Brother, I can't understand."

This requires a very profound geometry knowledge. Chen Zairong specializes in poetry and books, and occasionally does some mathematical questions. It is normal that he cannot understand it. Chen Wanrong doesn't care: "This proof method is very concise and clear. The person who proves must be an amazing genius!"

Chen Wanrong had studied advanced mathematics and knew how to solve calculus. He thought that his understanding of mathematics was half better than that of the Tang people. Now he had no idea at all. He sighed that he was not as good as he did and felt respectful.

Chen Wanrong was so excited to find out this kind of method in the Tang Dynasty. He glanced around the lines. If the lines were magnets, his eyes were iron blocks attracted by the magnets. He looked carefully and did not miss any details. Suddenly, Chen Wanrong seemed to have discovered something. He took out a piece of paper from his arms in a hurry, opened it, and looked at the cloth. He said in surprise: "It turned out to be her!"

Chen Zairong couldn't understand it, so he said: "Brother, who is it?"

Chen Wanrong pointed to the paper in his hand and explained: "After Rong, look, are the handwriting in the last four lines of this picture the same as the handwriting on the cloth piece? They are the same person!" This picture is the tree planting picture that Wu Jing gave to Chen Wanrong. Chen Wanrong has always wanted to know who the woman who drew sixteen lines was, so this picture has always been with him.

Chen Zairong carefully compared it and said in surprise: "Yes, the same person! Brother, please ask who it is."

Even if he didn't say it, Chen Wanrong knew what to do, and asked a woman in her twenties beside him: "May I ask, who is the master of solving problems?"

The woman did not answer Chen Wanrong's question, but stared at Chen Wanrong: "What did you ask her?" She curled her lips, and she was quite contemptuous.

She treated Chen Wanrong as the kind of disciple who had bad intentions. Chen Wanrong was not in the mood to defend her and lied: "I am her cousin. We made an appointment to meet here, but I can't find her."

"Are you her cousin?" The woman smiled: "That sister is so beautiful." The implication is very clear, that is, Chen Wanrong is too ugly and does not deserve to be her cousin.

Chen Wanrong thought he was not very handsome, at least not annoying. After hearing her words, he suddenly choked and heard the woman say, "She left, she has been away for a while. You are really a man, but you have not made an appointment with others for a long time. You are too rude! In this direction." He pointed to the north.

Seeing the tree planting picture she painted, Chen Wanrong admired it from the bottom of his heart. The goodbye was already full of energy, and he really wanted to see her immediately. After hearing this woman's words, he was very sorry, and he was always miserable. He thought about it and had to find an opportunity to ask Wu Jing or Huang Boming, so he didn't have to hurry up and then he felt relieved.

Chen Zairong saw Chen Wanrong's loss and hurriedly comforted him: "Brother, it's not difficult to know, you can ask Mr. Huang. Brother, I didn't tell you, it's not difficult to let Mr. Huang say it out. As long as Wu Jing is not here, it's easy to do."

The last time I asked, it was Wu Jing who stopped Huang Boming. This made sense. Chen Wanrong nodded and said, "Okay, I'll go to the school to have a good chat with Mr. Huang."

After talking about something, there was another move. Chen Zairong smiled and nodded, thinking that with Chen Wanrong's agility, Huang Boming was not an opponent and would definitely say it out.

The two brothers came to the ox cart parked by the roadside. The poet wrote in "The Beautiful People's Walk" that "the weather is new on March 3rd, and there are many beautiful people by the water in Chang'an. Their appearance is thick and the meaning is far and true, the texture is delicate and the flesh is even. The embroidered clothes shine on late spring, and the golden peacock and silver unicorn are furrowed."

Although today is the fourth day of the March, not the third day of the March, there are still many beautiful people by the water, walking together in groups of three or five, which is not inferior to March. Wearing a fashionable skirt, red, yellow and green, it is a beautiful scenery on the coast of the Wei River.

The man from the Gu family of Wang Chen hurriedly said, "Wanrong, let's go back quickly. If you put it on, it will be dark."

It was actually very early, and the salary was not even here. Chen Wanrong understood her mood: "Mom, let's go now." He jumped into the car, and Chen Zairong drove the ox cart and set off again.

The coast of Wei River is a famous tourist attraction in Chang'an. There are so many people coming to enjoy the scenery, there are many people who are juggling and performing arts, and there are many tricks of swallowing a knife and spitting out fire. Sitting in the ox cart makes you feel good when you watch it, Chen Wanrong was very happy to watch it.

After walking for a while, I saw a group of people surrounded by the eldest son, three floors inside and three floors outside, crowded with people, not ten thousand or eight thousand. I stood on tiptoe and stretched my neck, as if I was looking at a diorama.

There are many people selling juggling in Chang'an. Chen Wanrong saw so many of them, but he didn't care. He only heard the crowd burst into thunderous sounds: "Okay, okay! That's great!"

"What are they looking at?" Chen Houshi muttered.

"No matter what he is, it's important to go home!" Chen Wangshi once again showed the character of the Gu family.

Chen Zairong's curiosity also aroused. He stretched his neck and looked into the crowd. There were too many people and couldn't see clearly. Chen Wanrong thought that no matter how magical it was, it could not compare to modern magic, so he didn't care at all. He was the backbone of the family, so he didn't say to see it. Although Chen Chen really wanted to join in the fun, he endured it and didn't say anything.

"Gongsun Jianwu, Gongsun Jianwu!" The crowd burst out with earth-shaking roars again, as if they had seen the most amazing thing in the world, full of endless joy and surprise.

Who knows the name of Gongsun Jianwu? The Gongsun Jianwu in the poet's poem is a masterpiece of all ages! After hearing this, Chen Wanrong almost fell from the car, his head buzzed and kept shouting: "Zairong, stop, stop, stop quickly!"

"Brother, it's Gongsun Jianwu, it's Gongsun Jianwu!" Chen Zairong had stopped the car long ago without waiting for Chen Wanrong to speak. His face was so excited that his face turned red, and his eyes were filled with surprise: "Brother, we are so lucky to meet Gongsun Jianwu! This trip to Chang'an was not in vain!"

A thousand years later, I can still feel the charm of Gongsun Jianwu when I read the Poet Saint's "Sword and Artifacts". Unexpectedly, Chen Zairong, a Tang Dynasty man, also knew his name and was still so surprised. His words were not spoken, but sung.

Chen Zairong jumped out of the car, tied Xiao Hei to the tree beside the road, and said in endless surprise: "Brother, hurry up, let's go watch Jianwu." Without waiting for Chen Wanrong to speak, he trotted over.

"What should I do if the cow?" Chen Wangshi stood still.

Gongsun Jianwu is so rare. If you miss this opportunity, Chen Wanrong will definitely regret it for the rest of his life. He pulled Chen Wangshi and ran away: "Mom, don't worry, Xiao Hei recognizes his life, no one dares to get close."

Chen Wangshi wanted to say something else, and she had already pulled Chen Wanrong and ran away. Chen Laoshi hurriedly followed from behind.

"Give it!" Chen Zairong shouted at the top of his voice, taking on the role of "pioneering the way". His hands kept pushing and shoving in the crowd, no one could resist it, and they dodged one after another, giving way.

Chen Wanrong hurriedly followed, and the family rushed straight to the inner circle under the guidance of Chen Zairong. There were too many people. Even though Chen Zairong was very strong, he had to work hard to get into the inner circle.

On a low-high platform, there was a young woman holding a bright long sword in her hand and dancing. The sword light was trembling. A long sword in her hand was like a dragon soaring into the sky, and it was uneven, high and low, east and west, and extraordinary. The crowd of onlookers burst out from time to time.

This woman is very beautiful, but she is only 28 years old. This is the "Grandma Gongsun" who has been remembered forever? It's almost the same as Miss Gongsun, and she can't fight with "Grandma". Chen Wanrong really doesn't believe that she actually met Auntma Gongsun.

The woman raised her right hand, and the long sword could not rotate above her head, and beautiful sword flowers appeared, shining in the sunlight. Chen Wanrong couldn't help but shout loudly: "It's so amazing!" A thunderous sound drowned his cheer. Although Chen and his wife couldn't understand, they couldn't help but applaud.

The woman kept spinning on the ground with one leg, and suddenly stopped. She put her sword in front of her chest, clasped her fists at the crowd, and said crisply: "Thank you, thank you!" The sound was crisp and pleasant, as if a pearl hit a jade plate, which was very pleasant.

Such a beautiful and pleasant sound is pleasing to the eye, but it is exchanged for people's sighs, "Oh". Tens of thousands of people sigh together, and the momentum is so powerful. Chen Wanrong glanced at him and saw people looking depressed, as if they had encountered the saddest thing. Although Chen Wanrong was smart, he couldn't understand why people were so depressed.

"Such a wonderful sword weapon dance is gone!" There were a burst of discussion in the crowd. Chen Wanrong then realized that they regretted that they could no longer see Gongsun Jianwu.

"Miss Gongsun, let's dance for us." Someone suggested very much.

"Another part!" The crowd burst into a roar.

The woman bowed with her fists and said, "Dear uncles and uncles, all the fellow villagers: Senior Sister Gongsun is not here, I would like to thank you on behalf of Senior Sister!"

The dragon-like figure of Gongsun was like a dragon. Chen Wanrong thought that the woman in front of him was Gongsun. Unexpectedly, it was not. He was very disappointed when he didn't see this famous artist of the Tang Dynasty.

"Your senior sister is not here, so will you dance!" The crowd started to stir.

The woman's chest was undulating, her breath was uneven, and crystal beads of sweat oozing out from her forehead. It was obvious that the sword dance was also very tiring. The audience was in high spirits and was still not satisfied. One person suggested that, and thousands of people were in harmony, and the sound of the harmony was heard.

The woman's beautiful eyebrows frowned slightly, her lips tightly pursed and did not say anything. It was obvious that she was thinking about whether to agree. Chen Zairong whispered in Chen Wanrong's ear: "Brother, look at me to dance." Without waiting for Chen Wanrong to speak, she jumped onto the stage, drew her sword out of the sheath, and bowed to the crowd: "Dear fellows, brothers and sisters, I just watched this sister's sword dance, and I got a little bit of gain. Please don't laugh if you don't have any trouble!"

"Go down! We want to see Gongsun Jianwu!" The crowd roared, and the sound of reluctance was heard. Fortunately, they did not have rotten eggs or bricks in their hands, otherwise Chen Zairong would have been bruised and swollen from his nose.

The woman didn't believe that Chen Zairong could dance her sword weapon. She was about to drive Chen Wanrong off the stage, but Chen Zairong's right wrist shook, and a training-like sword light appeared, creating a beautiful sword flower. It was the style, direction, force and arc that the woman had just danced, and it seemed that Chen Zairong had already practiced. She opened her mouth and almost exclaimed, and hurriedly covered it with her right hand.

Chen Zairong's sword appeared like a dragon, and was extremely agile. The swords and swords were danced by women just now. The flexibility, strength and ornamentality are not as good as those danced by women. It is even more rare that Chen Zairong's sword dance is more masculine and more grand than those danced by women.

The crowd was originally disdainful, but Chen Zairong had just danced a few swords. The crowd had stopped clamoring. He looked at it intently and burst out from time to time.

When Chen Zairong scolded the crowd, Chen Laoshi and his wife were frightened and didn't know what to do. Now the crowd was cheering again, and the couple couldn't help but be happy. They just felt that Chen Zairong was too show off. He was really capable of his son. The red light on his face was enough to compare the hot sunshine.

After watching for a while, the woman's eyes became more and more surprised. The long sword in her hand was lifted up steeply, with a light gait, like a butterfly, and she became beautiful step by step. When she came to Chen Zairong, the long sword drew out, bringing out a beautiful arc, dancing with Chen Zairong.

The two seemed to have been training for a long time, and they cooperated with each other. Their charm was far beyond the reach of a single person dancing. The crowd had long known how many sounds they drank, which sounded and sounded the clouds.

After the dance, the woman slapped her with a high-five and said, "Good sword, good sword!"

Chen Zairongqian said: "Sister's sword is a good sword!"

"How did you learn it?" the woman asked strangely.

Chen Zairong explained: "I saw my sister dancing with swordsmanship, and her heart suddenly became clear. I understood the sword principles that I had not figured out before. If I couldn't do it, please don't laugh at me."

Zhang Xu is good at cursive script and has not made any progress in practicing for many years. One day, he accidentally watched Gongsun’s sword dance, and suddenly understood it. Cursive script made great progress and gained the reputation of "Cass Saint". Unexpectedly, Chen Zairong saw a sword dance and his sword skills were greatly improved. Chen Wanrong secretly praised him.

After careful reminiscing, I realized that the extraordinary part of Jianwu is full of artistic conception, as if in an empty field, you can walk whatever you want, and make people feel comfortable when you walk!

"You are the smartest person I have ever seen!" The woman was very happy and said, "Let's dance another song. However, this time it's something you haven't seen before. I dance in my head, and you are playing the sword behind you."

This is like a test question, when a woman draws a sword and Chen Zairong cooperates, it is very difficult. Furthermore, this is a peerless sword dance, which requires both beauty, masculinity, and ornamentality, grand and pleasing to the eye. The many requirements are simply harsh.

"Okay! Sister, please!" Chen Zairong thought for a while and nodded in agreement.

The woman was originally taking the exam to compete with Chen Zairong, but then she had such a difficult problem. Unexpectedly, Chen Zairong agreed. She was both surprised and happy and said, "I'm taking a sword!" As the white wrist turned, the sword light suddenly appeared, winning a sound of excitement.
Chapter completed!