From Chief to Ball

The eight solar terms correspond exactly to the nine number chart.

Correspondingly, there are also four directions in the southeast, northwest, and then divided into four oblique directions, which also correspond exactly to each other.

There is no doubt that civilizations and ethnic groups with calendars must have rich knowledge of mathematics and astronomy, and it also proves that they have enough food to support those who observe the sky and calculate the shadow of the sun.

Although Shujiu said that the cloud is calm and the wind is light, only showing a little pride, but Chen Jian knows that this pride may be the result of her mother's painstaking calculations and staring at the shadow of the sun for a long time. This is worthy of respect, no You should use that little thing in your head to turn a tribe's decades of civilization achievements into a joke.

There is plenty of time to pretend to be aggressive. It will be interesting to wait until the era when a hundred schools of thought are contending and debating the world, and to use that knowledge to make the era more exciting and heroic.

Moreover, he also needs to learn the calendar knowledge that he knows about counting nines, because under the conditions of tools such as a clepsydra timer, it is impossible for him to determine which day will be the real vernal equinox and autumnal equinox, and even if he has it, he will not be able to spend three days. Five years to observe the four seasons.

From nothing to existence, from wildness to civilization, can never be supported by one person. What is exchanged is not only the invented tools, but also the wisdom passed down.

Since they have the same blood, similar language, and belong to the same cultural circle as those tribes downstream, the best choice is to integrate into it and become the leader of civilization instead of recreating a completely different civilization.

There are only so many things in Chen Jian's head, but civilization and the entire ethnic group are constantly improving.

In this life he is a god, because it is difficult for anyone to understand why.In the next life, he may be a genius, perhaps beyond the age, but there are still people who understand.Only when he's just a smarter kid is the whole civilization going to stand.

From the very beginning, he has worked hard to destroy his own myth.

The day when one's own knowledge disappears from everyone, is also the day when the ethnic group stands on the planet and the sun never sets.

People always have to pursue something. To be an exquisite egoist is not his three views, it's as simple as that.

Smiling and watching my own group crush all enemies, technology and civilization amazed other races, creating a history full of inevitability and accident, I may be the leader, or I may only participate in it, no matter which one, look through the history books in the future Every time, I remember with a smile.

I fought this battle, I discovered this new continent, I printed the pamphlet of this revolution, and I released this one-eyed man in advance... Standing on the cusp of the times and being a waver of the times is far more important than a brocade suit It is much more interesting to be accompanied by jade food and beauties.

His dream, now looks promising.

Because from Shujiu's mouth, he heard the word he most wanted to hear when he gave the gift.That's when she pointed to the inscribed triangle and said the word "must be".

This is the embryonic form of logical deduction and rational thinking. It seems simple, but it is detached from specific abstract theorems.

Because of A so B, if A then B must be, these two seemingly simple sentences supported Chen Jian’s nearly 20 years of study in his previous life.Simple, if the hook is three and four, then the string must be five; complicated, because of the centrifugal force and the acceleration of gravity, when the object reaches eight kilometers per second, it can rotate around the earth without falling to the ground...

Even because there are not enough seeds, Shujiu can use beans to increase the weight of negotiations; because he has just integrated the tribe, he must find a way to get seeds to increase his prestige.He likes to quarrel with this kind of person, and he also appreciates it.

It's just that Shujiu won't give up his benefits because of Chen Jian's respect and appreciation, and ask for prices;

After leaving the hall, Chen Jian looked at the pottery Nine Numbers Chart, thinking of trying to trick the other party's calendar into his hands.That night, a dozen people went to the pottery kiln to get busy.

Shujiu didn't know what Chen Jian was busy with, and he was thinking about tomorrow's negotiation. Today, he relied on the Jiushu map to win the momentum, which was slightly better. Tomorrow, he might have to rely on Guibiao to let Chen Jian lower his head in terms of momentum, because the two races are different from each other. If there is a need, the only thing that can take advantage is such a breath of energy.

She knew what Chen Jian said was right, salt water was not so easy to find, and her own tribe might not be able to beat Chen Jian's tribe, so the salt had to be changed, and the ox cart had to be brought back.

But she also knows that time is on her side.

Based on her understanding of the seasons in the calendar, there is still a month at most. If you don't plant the beans, it is impossible for the beans to mature before the frost.And counting the time it took to bring it back, there was still ten days at most for Chen Jian to argue with himself.

It's just that the asking price can't be too high. If it's really urgent, it won't be a problem for this tribe to survive for another year by gathering, hunting and fishing. This place is completely different from the wild villages downstream, and it can support it.

When there are enough seeds of wheat and peas, the beans and corn can no longer be exchanged for these things. When the seeds are not enough, the beans and corn are sold for the price of the seeds; when there are enough, they can only be sold for food. the price.

She thought about it, lying there tossing and turning, until before going to bed, she finally made a decision: the bottom line is thirty ox carts, enough salt for the tribe for two years.

Early the next morning, the two of them came to the conference hall again, counted nine and looked at Chen Jian's dark circles and asked, "It's been a night, do you understand?"

Chen Jian spread his hands and said, "Not yet, soon."

"Ha ha."

She chuckled lightly, but Chen Jian didn't care, and said, "Your tribe's numbers are great, but our tribe's shape is also great. Let's not talk about those things today, let me show you something fun."

Shujiu panicked, knowing that it might not be as simple as fun, so he deliberately refused.

However, she has been dealing with numbers since she was a child. Apart from divination, she is obsessed with those numbers. After all, it is difficult to resist the temptation of these things, and she leans her head towards them.

Chen Jian took out a large pile of small square pottery plates of the same size, each only as wide as a thumb, and piled them on the wooden boards in a large pile.

He first used 12-yuan pottery boards to spell out a rectangle with four lengths and three widths, then drew a black line along the diagonal of the rectangle, and asked, "How long do you think this line is?"

Shu Jiu tilted his head to look at it for a while, then shook his head and said, "I can't guess."

"I guess five."

Then Chen Jian placed five square pottery panels along that oblique line, and said triumphantly, "Isn't it amazing?"

Shujiu laughed disdainfully, thinking that you must have measured it in advance.

But then Chen Jian fiddled with the pottery board a few more times, finally making Shu Jiu a little surprised.

He first placed a square with three sides, then placed a square with four sides, and finally placed a square with five sides along the diagonal line, and said, "Look again."

She counted, secretly startled.

The number of these two small square pottery plates is exactly the same as the number of hypotenuse pottery plates.

This is a coincidence?Or is it as inevitable as the circle diameter, moment angle?

Seeing that she was already meditating there, Chen Jian struck while the iron was hot, adding three fours together to form a square with a side length of seven, leaving the square with a side length of five and the rectangle with a length of four and a width of three , but spelled out the same one again.

Shujiu's eyes were fixed on those pottery plates, and he couldn't move them away.

This is form, which she is not good at, but what is contained in it is also number, which she is good at.

A Pythagorean theorem A plus B square is equal to C square, a factorized (A+B) square is equal to A plus B square plus 2AB, after using pottery plates to change into rectangles and triangles, it is full of magic— —Number and shape, it can still be like this.

She looked at it for a long time, vaguely as if she had grasped the key point, but she always felt that she was one step away.

It's like standing by the river and catching fish with your bare hands. You obviously feel that you can catch it with your hands, but what you want will always slip away.

It was just a few dozen ceramic plates, but she stood there in contemplation for a long time. She stretched out her hand and fiddled with it again according to the way Chen Jian had played with it.

Habitually scratching her nails on the wooden board, she would do this every time she was obsessed with numbers. Her people had long been used to it, but here she seemed a little crazy.

He kept muttering in words that Chen Jian couldn't understand, with one finger in his mouth, biting it full of teeth marks, looking like a madman.

"How could this be? How could this be?"

"Want to know?"

Nodding at nine, Chen Jian said with a smile, "I want to know when day and night are equally divided, and when day is long and night is short."

Chapter 73 Uniforms

"I want to know, I really want to know. But for the whole tribe, these playthings can't be exchanged for those four days. Those are the days that the tribe and ancestors observed for a long time before they knew."