Before the emergence of the Hun Gai controversy, every child of the family would listen to the sect talk about Gaitian in the clan school since he was a child, and the central idea of Gaitian can be summarized into three paragraphs.

"The way of heaven is the rule, the tunnel is in order, the sky is round and the place is in the center."

"The sky is shaped like a hat, and the ground is like a chess game. The sky turns like a grinding, and the sun, moon and stars are embedded in it, and then they are hidden, and they are drawn to the west. We wait to see it like an ant grinding. The grinding disease is too late, so it is too late to chase it. The sunrise is high and seen, and the sun is low and not seen, so there is day and night. ”

"The celestial bodies are like projectiles, and there is light in them, which is the sky lantern. Big or small, it's generally the same. The sky is high and located below, and the sky lantern is above, shining on my mountains and rivers. ”

In order to make it easier to understand, Zero One chose a relatively suitable style of classical Chinese for translation, and then translated it into modern language to tell Yang Xiaoqian, the approximate meaning of these three paragraphs:

"The way of heaven is natural and noble, and the earth is humble and decent, the sky is a round cover covering the earth, the sun, moon and stars are the ornaments inlaid on this round cover, and the earth is like a static chessboard, in the center of the round cover and the chessboard, it is the Fu Dao that supports the space for human beings to live."

"When the canopy rotates, it's like pushing a millstone, and those ornaments (the sun, moon and stars) are located in different areas of the millstone, and we humans are like ants staying under the millstone, and we can't keep up with the speed of the millstone's rotation, so we will see the sun and moon alternate, and the stars looming, so there is day and night."

"The shape of the canopy is like a projectile, illuminating the middle is the sky lantern, sometimes big, sometimes small, the sky is above and the earth is below, so the sky lantern illuminates the earth, mountains and rivers."

Gaitianshuo preaches the concept of the inferiority of heaven and earth, believes that the heavenly canopy is a barrier to protect the earth, and believes that we should obey the will of heaven and concentrate on pursuing the mysteries of runes, rather than vainly trying to explore the extraterritorial world beyond the canopy.

Because Gai Tian said that it has a natural superiority over the idea of centralization, which is conducive to brainwashing the lower class of people, so the major families and the Ming Dynasty, which later established feudal imperial power, strongly supported Gai Tian theory.

In addition, the Gaitian theory is also conducive to the application of some relatively basic mathematical knowledge calculations (such as the Pythagorean theorem, also known as the Pythagorean theorem, which was also invented by a math master on Earth 4, but with a different name), which cannot be refuted even by the bronze instrument that later put forward the armillary theory.

After understanding the Gaitian theory, Yang Xiaoqian couldn't help but admire the magic and unity of human imagination, you must know that in the history of this world, there was also a Liang Wu Emperor who put forward a similar Gaitian theory, but he didn't expect to change to a world with a completely different historical trajectory, and there would be high-ranking people who put forward this point of view for fooling the people and centralizing power.

After talking about Gaitian, Mohuan continued to talk about the process of Tongyi's armillary theory.

………………

After traveling the world and returning to the Runetera Continent, Tong Yi was never able to comprehend his magical encounters, although many of his remarks - such as "There are Jedi in the far north, nothing is born, and the ice in summer is not released" - were later confirmed, but at the time they were dismissed as fantasy and fabrication.

After a long period of distress, one day, Tongyi saw a pearl in the tribal tribute.

When he saw this naturally formed and almost perfect sphere, Tong Yi suddenly realized, because he could not explain the existence of the horizon and the horizon, and decided to cross the horizon and the horizon to prove that Gaitian was wrong, but he just wanted to prove that the sky above his head was not a sphere, but he didn't think that the earth under his feet was not flat!

If the earth is also spherical, it can explain why it will eventually return to the original point if it keeps moving in one direction, and when this idea pops into his mind, even Tongyi himself is startled.

But how can the earth be spherical? How does man stand on the sphere? Unable to think of an answer, to test the idea, Bronze Yi set off again, this time leading the procession in the opposite direction from the previous one, and carrying a large number of talismans and leaving markers along the way.

Five years later, Tong Yi returned to the Rune Continent again, and during this five-year arduous journey, he left behind all irrelevant affairs, while meditating and thinking day and night.

When he returned to the Rune Continent again, he challenged the Gaitian Theory, which had been worshiped as a heavenly rule since ancient times.

Tongyi invited the major families to learn the sect, sat on the ground and talked about the Tao, and said amazingly: "Since ancient times, those who talk about heaven have all been ignorant of the heavens, and they have made assumptions from their hearts. dwelling in the snail corner, wanting to talk about the vastness of heaven and earth; Carrying a snail shell, and wanting to measure the depth of the ocean. I don't know how much I know! ”

This sentence roughly means: from ancient times to the present, people who talk about the canopy of heaven are people who have not really seen the sky, and they are completely based on their conjecture and speculation in their hearts to make judgments, which is too wrong, just like a person who lives in a volute discusses the vastness of the world's territory, or a person who hides in a snail shell, wants to probe the depth of the ocean, and really does not know the height of the sky.

All the scholars are people with extremely high cultivation skills, and they all suppressed their anger in their hearts, and watched coldly, wanting to listen to Tongyi's opinions.

Then, Tong Yi put forward the Hun Tian theory in the Tong Family School:

"The heavens and the earth are small, the earth is in the sky, like a chicken in a shell, the sky envelops the earth, like a shell wrapped in yellow, there is water on the surface, and there is white outside the yellow."

"The sky turns like the luck of the hub, the circumference is unprovoked, and its shape is muddy, so it is called the sky. The sky lantern is bright on it, day and night, and the glow is shining, shining on my rivers and mountains. ”

"What is it that the lamp shines in heaven to give me light? Turbulent celestial sphere, there is no support inside, the earth hangs in the middle, who supports the sky? ”

"There is a muddy sky outside the sky, and people outside the sky peep at me like a child peeping at the ant under the lamp, the lamp, the sky lantern. The earth, the water and the support. The heavens, the outsiders support them. ”

From this, it can be seen that the walls of heaven are made of silver, but they are far away and invisible. Looking up, the sky is also, why? If you look at the mountains in the distance and the colors are all green, look down on the thousands of deep valleys and look down on the black and steep. Fu Qing is not true color, and black is not body. ”

"Therefore, we should set up the will to seize the sky, extinguish the sky lantern, break the wall of the sky, and see the true universe."

(The earth is wrapped in the sky, like an egg in an egg shell, the sky wraps around the ground like a shell holding an egg, and the sea water below is like a white on the outside of the egg yolk, wrapping the egg yolk.)

The sky is turning, like the movement of a car hub, it rotates again and again, with no origin and no end. Its shape is a natural, complete circle, so the shape of the sky is called the armillary sky. The sky lantern is lit on the sky dome, and it is day and night. Its splendor shines brightly on our vast territory.

Why do sky lanterns illuminate our surroundings? Since the earth and the celestial sphere are round, and there is no place to support them, what holds up the earth? And what holds up the celestial sphere?

Presumably, there is a world outside this world, and people outside look at us here, like children peeping at ants under the lamp, and this lamp is the sky lantern above our heads. Also, our ground is held up by the runes and water on the inner shell of the heavens. And the celestial sphere, the "eggshell", is held up by runes by observers outside the sky.

Since it is held up with runes, it is conceivable that the heavenly realm is made of silver, but when you look up, why is it black and pale? This kind of thing is like looking at the hills beside the road that are all blue, and looking down at the deep valley and all of them are pitch black. So this cyan is not the cyan color of the object itself, and black is not the color of the object itself.

Therefore, we should set up a great ambition to resist the outsiders, extinguish the sky lantern, so that the people outside will not see us, and then we can find a way to break this shell and go out and see the real big world outside. ）

For the scholars who have believed in the truth since childhood, the Hun Tian Theory is not only a deviant, but also a great rebellion, and this discussion finally ended in chaos.

If there is still no one willing to believe in the bronze instrument, then it will be fine, but not long after the bronze instrument put forward the armillary theory, a master who is proficient in mathematics openly professes to support the bronze instrument's theory of armillary heaven, and gave an explanation for the unexplained number rate of the bronze instrument: "The earth is vast and infinite, and the view is as flat as it is." Therefore, the distance of the place should be measured. (The ground is so big that it looks peaceful, so the geodetic should be measured little by little - assuming it's flat.)

The support of this grandmaster strengthened Tong Yi's belief, so Tong Yi began to set up his own school, not only teaching the children of the family, but also the warriors of the clan, not only teaching runes, but also teaching Hun Tian Shuo.

Because of the legend of Bronze Yi's journey across the wilderness - no one believed him when he first traveled around the world, but the second time he left a mark, and gradually some people began to believe that he had actually traveled to the end of the world, more and more curious young children came to listen to his teachings and became interested in the Heavenly Theory.

However, the concept of detachment from the times is always not accepted by vested interests, if Tongyi is just a person's rumors, but he has attracted a group of believers, and even with the help of more people, in the process of perfecting the Hun Tian Theory, constantly looking for the gaps in the Gaitian Theory. In this way, where can the major families tolerate the bronze instrument?

In order to avoid disasters, the Tong family severed relations with Tongyi early, and then, the major families imprisoned Tongyi on the charge of deviating from the scriptures and insulting the sect.

In the cage, in the face of intimidation and threats, Tong Yi refused to change his words, still insisting that Gaitian Theory was a mistake made by the ancestors, and Hun Tian Theory was the correct understanding of the world.

In the end, Tong Yi was personally put into the silver iron tripod by the criminal officer of the Tong family and executed by capital punishment.

The outside of the silver iron tripod is iron, the inside is silver, when the person is put into the tripod frame and bakes on the fire, the iron tripod is gradually burned red, the silver layer in the tripod gradually melts, the person is roasted alive and melts with the silver paste, and when it solidifies, remove some residues, and the tortured person is convenient for the tripod body to be integrated.

This is the most cruel punishment, but knowing that he can live by changing his words and admitting his mistakes, Tongyi did not say a word in the ding from beginning to end, and did not hold the celestial globe model in his hand until he died and shouted: "Or there are a thousand sky lanterns?" Or there are trillions of balls of earth?? The earth is like a chicken, or after the earth. Or the earth spirals the lantern to go, like a ring... Whew! Alack! It's a pity that you can't see the sky, and it's no longer knowable! Nao, no, the time is wrong for me! Who sees me as an ant under a lamp? Who spies on me like a beetle...... Don't touch my celestial sphere! Don't move the celestial sphere!! ”

(Could it be that there is not just one, but thousands of them?) Could there be a sphere formed by trillions of earth? A large earth body that is as irregular as an egg can probably be called the earth. Could it be that the earth is revolving around the sky lantern, like ...... Worst! Sorrowful! It's a pity that you can't see the world beyond the sky, so you can't know! However, the time is wrong for me! I don't know who is looking at us like ants under the lamp, like little insects in the cracks...... Don't touch my celestial sphere! Don't touch my celestial orb! ）

With that, Tong Yi threw the celestial sphere out of the silver iron tripod and died.

After Tongyi's death, the major families completely denied the Hun Tian theory, and severely punished the children who believed in the Hun Tian theory, but the hearts of those who seek knowledge and pursue the truth cannot be extinguished.

Decades later, when the previous generation of rulers were all reduced to dry bones, and some people in the clan schools of the major families mentioned the Hun Tian theory again, and this time, the opposition was no longer as harsh and terrifying as it was back then.

After another few decades, several groups of expeditions circumnavigated the globe by chasing the markers, verifying Tongyi's statements.

Finally, a century after Tongyi's death, several top families, led by the Mo family, recognized the Hun Tian theory, while the other families still believed in the Gaitian theory.

The battle over the cover began here.

Sixty years later, the Great War broke out, and the geniuses of the Ming family conquered the clan, destroyed the family, established the imperial power, and established the Ming Dynasty, while Mohuan fled here with the last surviving children of the Mo family.

After listening to this history that happened in another world, Yang Xiaoqian couldn't help but sigh with emotion: "There are strange people and great people in every world." ”

"So, there are also great people like Tongyi in this world?" Mo Huan's expression moved slightly, and he asked, "So, which is the correct understanding of the world, Hun Tian Theory or Gai Tian Theory?" Your power is so amazing and so powerful, you must have found the answer, right? ”

"Who knows, according to our current understanding, both the Hun Tian Theory and the Gai Tian Theory are wrong. However, Mr. Tongyi's epiphany before his death was closer to the correct answer. Yang Xiaoqian stretched out his hand and made a gesture, and the white wall facing the ink ring lit up with colorful colors, and began to show a video.

"This is the earth, that is, the 'chicken in the shell' in the armillary theory."

"This is the sun, what you call a 'sky lantern'. It is about 1.3 million times the size of the Earth, its surface temperature is about 5,500 degrees Celsius, and the melting point of silver is less than 1,000 degrees, and it melts as soon as it is slightly closer to the sun. ”

"This is the solar system, there are several chickens revolving around the sun, see, this is Jupiter, Mars, Saturn...... However, as far as we know, there should be no life on these chickens. ”

"This is the Milky Way, just a simulation of the light and shadow effects, we don't have the ability to take such an intuitive picture, see the solar system? Don't nod your head, you can't see it, the Milky Way is 100,000 light-years in diameter, and there are hundreds of billions of stars in it that you call sky lanterns, most of which are larger than the sun, and the solar system is placed in the Milky Way, like a grain of sand in the sea, you can see it. ”

"And what about the so-called extraterrestrial universe? Within the observable universe alone, there are hundreds of billions of star systems as huge as the Milky Way in the observable universe. ”

"Now, tell me, which is right, Hun Tian said or Gai Tian said? It's all outrageously wrong, no matter how smart the ancients were, they also had historical limitations, and only when we stood on the shoulders of our ancestors could we see further. However, although Hun Tian said that he was wrong, I personally admired and appreciated Mr. Tongyi's courage and ideas. ”

"Extinguish the sky lantern, break the sky wall, and see the outer world, haha, interesting, really interesting."