At the market.

Lin Chong came to the tailor lady.

The tailor lady asked with a smile: "Would you like to take care of your business today?"

"Besides that half of the Book of Changes, what else do you have to trade?" Lin Chong asked her.

"This is indeed the only piece I brought to the market," the tailor said with regret, "It is inconvenient to bring the others."

Lin Chong glanced back at the pheasant, then turned to the tailor lady and said boldly, "What if I were to exchange you and your Taoist lineage?"

To be honest, although the tailor lady was old and dressed in plain clothes, she still looked graceful. When she said this, she would inevitably be misunderstood as a playboy. Lin Chong felt particularly insecure at this moment.

Sure enough, as soon as these words were spoken, the butchers and rice-selling children on both sides looked over here fixedly.

"Hehe~ I'm old and can't move around much, but if the Supreme Being of this world invites me, it's not impossible. However... what do you want to exchange for it?" The tailor lady said with a smile.

"I have three Taoist traditions, but I don't want to change any of them. Is there any other way?" Lin Chong felt that the negotiation was about to fail as he said this.

The tailor lady's face turned cold, "So you want to do it?"

"Wait a moment." Upon hearing this, Lin Chong hurriedly pulled Zhi aside and asked, "What does it mean to have a fight?"

"It's just a one-time thing. The tailor lady has experienced trillions of calamities and her power is unfathomable. Are you sure?" Chi was quite worried.

"Of course not." Lin Chong said quickly.

"Then you'd better be careful. If you lose, she will take away your orthodoxy. In the past, so-and-so fought for the orthodoxy, and countless names were listed on the immortal list, just to determine who was the legitimate one. But we don't have much time, and we can't set up those formations. Maybe you still have a chance." Chi said worriedly.

So-and-so and so-and-so… As expected, their voices were muted again. Could it be that they couldn’t say those names? Lin Chong wondered in his heart.

"Why don't we have much time?" Lin Chong asked.

"Because it's only ten years." said Pheasant.

"Why is it only ten years..." Lin Chong was just about to ask when the spirit behind him urged him. There was no need to understand the details of the matter. The ten-year statement confirmed the previous statement and should be correct. He should go and try the tailor lady's conditions first.

But since Chi said he had a chance, and the spirit behind him asked him to try again... Lin Chong returned to the tailor lady and asked, "How is the match?"

"I ask a question, you ask a question, and whoever solves the other's question first wins." The tailor's eyes were full of dignity.

"...Can I take a look at your topic first?" Lin Chong asked the tailor lady.

"What I'm best at is sewing." The tailor lady waved her hand and nailed twelve needles on the table. "This is the great formation of the gods and demons of the sky. If you can break it, you will have solved a problem for me."

The great formation of gods and demons of all heavens?

Twelve needles?

Lin Chong looked at the twelve needles carefully and suddenly he felt as if there was a world within them, with twelve strange-looking witches dancing in it. Water and fire were surging, and the sky and the earth were sinking. He could not tell the directions, but there was an endless blood-red murderous aura rushing into his eyes.

Ah... Lin Chong felt like his eyes were going blind.

The next step is to step back and stop looking.

This formation...is not easy to break.

Just now I felt that I could throw myself into it, but if I do, does that mean the game has just begun?

"Can I try it?" Lin Chong asked again.

"If you try, you'll be making a bet with me." The tailor lady said with a smile, "Have you thought about the questions you want to ask?"

Lin Chong concentrated on thinking about it, and the spirit behind him was silent for a while. Suddenly, Lin Chong's eyes lit up: "Aunt Ma Gu, do you know math?"

"The art of abacus? I have a lot of experience and I know a thing or two." The tailor lady said proudly.

"Riemann hypothesis...BSD conjecture...N versus P problem..." Lin Chong muttered to himself. He couldn't make up his mind. In fact, it was 704 and the countermeasures team who were arguing endlessly. Coming up with one of the most difficult problems in the world of mathematics might stump the tailor lady, but that was only for the gamble.

If the lady tailor can solve a kind of physical and mathematical theory that is urgently needed on Earth, it will greatly promote the technological progress of the Earth. It is also a fail-safe strategy to consider failure before victory.

"Lin Man's conjecture!" Lin Chong finally said, "Assuming that in space and time, any location has two corresponding opposite points, given that point A is known, how can we determine the description of point B (the opposite point) in the void..."

Lin Man's conjecture is the ultimate concept proposed under the framework of the energy universe. If it can be solved, it means that the Earth has the theoretical support to break through space and time. All that remains is to step up efforts.

"What are A and B?" asked the tailor.

"It's a mathematical description, a kind of symbolic language that belongs to us..." Lin Chong followed the reminder of the spirit behind him and taught the tailor some knowledge.

There is no wrong version in the 1619 book forum!

Finally, the spirit behind the scenes gave Lin Chong some math textbooks. Lin Chong saw the title, "Three-Year College Entrance Examination and Five-Year Simulation", and gave the textbooks to the tailor lady.

The tailor lady took it, took a look at it, and said, "There is a lot of resentment on this object."

"Maybe too many people died on it." Lin Chong sighed inexplicably, "Yes, there are also these."

"Advanced Mathematics", "Linear Algebra", "Probability Theory", "Calculus"...

A big stack.

The tailor lady was slightly amazed, "The resentment is amazing."

"Read it first, then decide whether to gamble or not," said Lin Chong.

Looking at the tailor lady putting on glasses that she had gotten from somewhere and starting to read the math textbooks one by one, revealing an annoyed look from time to time, Lin Chong thought that it might take a long time, just for the tailor lady to understand the question.

As for the Dutian Shensha formation, Lin Chong secretly took a look inside.

Ha, the evil spirit is so shocking that it blinded my krypton gold dog eyes... But I can also see some clues. If I want to break the formation, I have to defeat the twelve ancestor witches first. Each of the twelve ancestor witches is at the level of a true immortal who has experienced several tribulations. A one-on-one fight is not difficult, but when the twelve of them join together, they form the Dutian Divine Evil, which is a blood-red aura that blinds the eyes, and it is the most yang and poisonous thing in the world.

If you want to break the formation, you must first find a way to defend against the Dutian Demon.

…

"Won't it reveal the uniqueness of the root and fruit if we give mathematical knowledge to the tailor?" 704 asked the countermeasures team.

“Although mathematics is Earth knowledge, it has not yet been integrated with the root fruit, and does not yet have the characteristics of the only root fruit. Of course, even if it has become the only root fruit without our knowledge, we are only ‘lending’ it to them for viewing, not trading.

If it’s not a deal, they can’t get it, and this has already been proven by Chu and Zhi.” The countermeasures team replied.

"If this method works, it will be an opportunity to test other heavens," said 704.

"That's right. Asking each other questions is actually a form of communication. In order to stump the other party, we must show the best of civilization to each other!" The countermeasures team became excited.

Three more~