Jian Chen saw what this was at a glance, but he didn't say it immediately, but deliberately frowned and made a solemn and thoughtful look. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

What will inevitably be done is now just a battle of wills.

As a plagiarist in later generations, he really didn't have the courage to say a word in front of the real discoverer, so that the pride and hard work of others turned into a shock and pretend.

What you don't have can have, what you already have must be respected, this thing seems simple, but in this era, for these nine numbers, it must be a lifetime of hard work for several generations, and how many heads have been wasted.

Out of respect, he carefully placed the clay tablet, shook his head, and said, "I can't read it, but maybe I can understand it tomorrow." ”

Shu Jiu looked at Jian Chen's frown and solemnity, his face showed brilliance, and the originally apprehensive mood became very happy at this time, as if he had reversed the slight decline in the previous quarrel a little.

"You drew this?"

"My mom." She is proud, and she is indeed entitled to be proud, after all, there is such a mother.

"Can you read it?"

"Of course!"

"Your mom is really amazing. Can I take it and watch it slowly? ”

"Yes, this is a gift for your clan, you are also very good, that ruler is very good."

Since you have won the battle of will, you must always leave some room and praise it, in fact, saying that the ruler is also very good, but I can see at a glance what you want to say.

Jian Chen smiled, put away the pottery plate with great dignity, and after showing his respect for the mother of the number nine, he restarted the negotiation of the transaction.

That pottery plate is the nine-number map, which is also the so-called Hetuluo book, a primitive nine-number magic square.

The sum of the three numbers is fifteen, which is just a mathematical concept, but it is a miracle for people at this time.

In addition, for a tribe with a solar calendar, this pottery plate contains more meaning.

The eight numbers in addition to the middle circle represent the eight directions and also represent the eight solar terms.

If the sun moves as the calendar, the four days of the year are the most special.

Because of the tilt angle of the earth, when the spring and autumn equinoxes are two days, the day and night are equal, and the time of the day is equally divided; The summer solstice has the longest daylight hours and the winter solstice has the shortest daylight hours.

This may be the earliest four solar terms of the solar calendar tribe, and then there is a division of spring, summer, autumn and winter.

There is a cycle of three hundred and sixty-five days a year, just like a circle, and these four days divide this circle into four equal parts.

And these four days are the four days with the most characteristics of spring, summer, autumn and winter, so divide this circle into eight equal parts, and the four days that are re-determined are the four days: the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter.

The beginning of spring to the beginning of summer is spring, and the beginning of summer to the beginning of autumn is summer...... By analogy, knowing the four seasons can guide the agricultural time.

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

Correspondingly, the southeast, northwest and northwest are also four directions, and the four oblique directions are also exactly corresponding.

There is no doubt that civilizations and peoples with calendars must have had a wealth of knowledge in mathematics and astronomy, and it proves that they have enough food to feed those who observe the sky and measure the shadow of the sun.

Although the number nine said lightly, only slightly revealing a little pride, but Chen Jian knew that these pride might be the result of her mother's painstaking calculations for a long time and staring at the sun and shadows, which was worthy of respect, and she should not use the little thing in her head to make the achievements of a tribe's civilization for decades become a joke.

Pretending to have time is time, and it will only be interesting to wait until the era of hundreds of schools of thought contending and arguing about the world, and take out those knowledge to make the era more exciting and heroic.

Moreover, he also needed to learn the knowledge of the calendar that he knew about the number nine, because under the conditions of tools such as a leaky pot timer, it was impossible for him to determine which day was the real spring equinox, and even if he did, it would be impossible to spend another three or five years observing the four seasons.

From scratch, from barbarism to civilization, it is never something that can be supported by one person, and it is not only the tools invented that are exchanged and exchanged, but also the wisdom that has been passed down.

Since they have the same blood, similar language, and belong to the same cultural circle as those tribes downstream, the best option is to blend in and become the frontrunner of civilization, rather than creating a completely different civilization.

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

He is a god in this life, because it is difficult for anyone to understand why. In the next life, he may be a genius, perhaps ahead of his time, but there are still people who understand. Only when he is just a smarter child can the whole civilization stand.

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

The day when one's knowledge is lost to the public, that is, the day when the race stands on the planet and the sun never sets.

People always have to pursue a little, to be a refined egoist, not his three views, it's as simple as that.

Laughing at the crushing of all enemies by their own race, technology and civilization amazed the rest of the race, creating a history full of necessity and chance, you may be the leader, or you may only participate in it, no matter which one, when you look through the history books in the future, you will smile and remember.

I fought this battle, I discovered this new world, I printed the pamphlets of this revolution, and I put this one-eyed man in advance...... Standing on the cusp of the times and being the trendsetter of the times is far more interesting than the company of beautiful people in brocade clothes.

His dream now seems to be a hopeful fulfillment.

Because from the mouth of the number nine, he heard the word he wanted to hear the most when he gave the gift. That's when she points to the triangle inside the circle and says the word "it must be."

This is the rudimentary form of logical deduction and rational thinking, which may seem simple, but it is beyond the concrete abstract theorem.

Because of A, B, if A, then B must be, these two seemingly simple sentences, supported Chen Jian's nearly twenty years of study in his previous life. Simple, if the hook is three strands four, then the chord must be five; Complex, because of centrifugal force and gravitational acceleration, objects can rotate around the earth without falling to the ground when they reach 8 kilometers per second......

Even because there are not enough seeds, the number nine can use beans to increase the weight of negotiations; Because he had just integrated the clans, he had to find a way to get the seeds to increase his prestige. He likes to quarrel with this kind of person and appreciates it.

It's just that the number nine will not give up their interests because of Chen Jian's respect and appreciation, and they will ask for a sky-high price; Chen Jian had no choice but to repay the money on the spot, and the two quarreled until the evening, tired, and dispersed, and agreed to continue the conversation the next day.

After leaving the hall, Jian Chen looked at the pottery nine-number chart, and said in his heart that he had to find a way to deceive the other party's calendar. That night, more than a dozen people went to the pottery kiln to get busy.

Shujiu doesn't know what Jian Chen is busy with, he is thinking about tomorrow's negotiation in his heart, today he has won the momentum by relying on the Nine Numbers Diagram, and he has a slight advantage, and tomorrow he may have to rely on Guibiao to let Chen Jian bow his head in momentum, because the two clans have their own needs, and the only thing that can take advantage is such a breath of spirit.

She knew that 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 must be changed, and the ox cart must also be returned.

But she also knows that time is on her side.

With her understanding of the calendar seasons, there is still a month at most, and if the beans are not planted, it is impossible for the beans to ripen before the frost. And counting the time to transport it back, there is still ten days left for Chen Jian to fight with himself.

It's just that the asking price can't be too high, if it's really urgent, it's not a problem for this tribe to rely on gathering and hunting and fishing to support for another year, and it's completely different from the wild villages downstream, and it can hold on.

When there are enough seeds of wheat and peas, beans and corn will not be exchanged for these things - when there are not enough seeds, beans and corn are sold for the price of seeds; When it's enough, it's only the price of food.

She pondered, lay there tossing and turning, until she went to bed, and finally made a decision: the bottom line was thirty ox carts, enough for the tribe to have salt for two years.

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

Jian Chen spread his hands and said, "Not yet, it's almost there." ”

"Huh."

She chuckled, and Jian Chen didn't care, and said, "The number of your tribe is very powerful, but the shape of our tribe is also very powerful. I'm not going to talk about those things today, but I'll show you something fun. ”

Shujiu panicked, knowing that it was probably not as simple as fun, and he had the heart to refuse.

She has been dealing with numbers since she was a child, and in addition to divination, she is obsessed with those numbers, and after all, she can't resist the temptation of these things, so she leans her head over.

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

He first used twelve clay plates to make a rectangle four long and three wide, then drew a black line along the diagonal of the rectangle, and asked, "How long do you guess this line is?" ”

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

"Five, I guess."

Then Chen Jian followed the diagonal line, placed five square pottery plates, and said triumphantly: "Amazing, right? ”

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

But then Jian Chen fiddled with the pottery plate a few more times, and finally surprised Shu Jiu.

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

She counted them, secretly frightened.

The number of these two small square clay slabs is exactly the same as the number of beveled clay slabs.

Is this a coincidence? Or is it as inevitable as a circle of moments?

Chen Jian saw that she was already pondering there, struck while the iron was hot, and added the three fours together to spell out a square with a side length of seven, and did not move the square with a side length of five, nor did he move the rectangle with a length of four and a width of three, but spelled out a similar one.

Number Nine's eyes were staring at those pottery plates, and he couldn't take them off.

This is the form, the shape she is not good at, but the thing contained in it is the number, the number she is good at.

A square of the Pythagorean theorem plus square b equals square c, and a factorized (a+b) square is equal to square a plus square b plus 2ab, after turning into rectangles and triangles with clay plates, it is full of magic - numbers and shapes, it turns out that this can still be done.

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

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

It was just a few dozen pottery plates, but she was stunned and pondered for a long time, stretched out her hand and re-made it in the way that Chen Jian had fiddled, and felt more and more that these pottery plates had the magic power to fascinate her.

The habitual rattling of her nails on the plank, every time she indulged in counting, her people had long been accustomed to it, but here they seemed a little crazy.

He kept muttering in words that Jian Chen didn't understand, holding one finger in his mouth, biting it full of tooth marks, like a mad demon.

"How so? How so? ”

"Want to know?"

Number Nine nodded, and Jian Chen smiled: "I want to know which day and night are equal, and which day is long and night short." ”