It was the second day since Ren Baqian met Qing Lian.
In fact, Ren Baqian already knew that this group had passed through Ping City 13 days ago. He only found out last night that Qing Lian was with them.
Early the next morning, Ren Baqian saw a graceful lady waiting in front of the academy.
He had arranged to meet Qing Lian in the afternoon, but when he saw her now, he understood that she was here to familiarize herself with him. After all, she was his student, so he didn't say much and let her in.
They sat down, and Ren Baqian looked at Qing Lian. After more than a year in the volunteer army, she hadn't changed much. Her skin hadn't darkened, and she hadn't become more resolute. She seemed to be the same gentle lady from back then.
"Principal! I'm here to return the books! "
Qing Lian had a wide forehead and a big mouth, but these weren't flaws on her face. She was very beautiful when she smiled. The most important thing was that she had a scholarly temperament, which was rare in this world.
Ren Baqian brought a few books over. Three of them were about mathematics, and the other two were about probability.
One of them even touched on calculus.
For this world, this was rather advanced knowledge.
Alright, on Earth, this was considered a rather complicated knowledge. Who knew how many people would wish they were dead.
In any case, Ren Baqian knew that it would be as difficult as defeating the empress if he wanted to pass.
"Do you understand?" Ren Baqian had a kind smile on his face, but his heart was full of malice. He wanted to let the natives of this world experience the power of calculus.
He originally wanted to lock his students in the classroom in a few years and let them pull their hair out in front of calculus. He didn't expect someone to see it in advance.
"I understand most of it, but there's one thing I don't quite understand. I was just about to ask you! There's still something I don't understand about the fixed point theorem … "
Qing Lian took out a wooden board and used a hairpin to engrave numbers on it.
"Here, let F be a continuous mapping from a sphere to itself. There must be a point c such that F (c) = c.
Or – c. That is, F either has a fixed point or a point that maps to its opposite point … "
The smile on Ren Baqian's face immediately froze.
The terrifying memory of being dominated by calculus resurfaced in his mind. He felt a toothache and the urge to pull his hair out …
Oh, he had no hair now.
"Stop!" Ren Baqian quickly stopped her and asked with a strange expression, "Are you here to test me today?"
"How could I? I'm also a student of Principal Zhang, and I'm here today to ask for advice. I don't think anyone in this world can answer my question except for you! "Qing Lian blinked her eyes and said.
She thought about the reason why Ren Baqian had rejected her. The probability of the reason being true was 30%, the probability of not being able to answer was 50%, and the other possibilities were 20% …
In other words, there was a 50% probability that Ren Baqian could answer her question.
The probability of him meeting someone who could answer this question within three years was one in a million. In ten years, the probability was one in ten thousand. In twenty years, the probability was one in a hundred.
This probability would increase with time. In other words, there was a high probability that he would meet someone who could answer his questions after twenty years … That was too long …
He still had to rely on Zhao Prince Consort.
Ren Baqian inexplicably got goosebumps all over his body. He suddenly felt that Qing Lian's calm and serene expression … was probably a demon, right?
Ren Baqian would never touch calculus again!
However, he couldn't admit defeat at this time.
"The batch of students that you know will graduate in two months. After graduation, some of them will continue to learn more advanced knowledge. If you can give up everything and return to the academy, I will teach you about calculus.
I borrowed your books because you are sincere about learning, but now, in what capacity are you asking me for advice? " Ren Baqian felt that he had found a good excuse. After all, she wasn't a student of the academy anymore, but a military counselor of a Great Xia volunteer army.
You aren't my student now, so I naturally won't answer such a profound question.
Well, this reason wasn't very good, but Ren Baqian couldn't think of a better one so he didn't reveal his fear.
Qing Lian was stunned and then pursed her lips into a smile. "I was too presumptuous."
Following which, he smiled extremely brilliantly and proposed a request that had a success rate of 87%. "In order to better communicate with Dayao, Duke Su wants to send an envoy to Lan City. I want to settle some matters and become the envoy. When the time comes, Principal Ren, please don't reject me from returning to the residence to study."
Ren Baqian was surprised. "Send an envoy? In what name? "
Su Gong was Su Qing, who established himself after the uprising. At this time, although the volunteer army had reached a scale of one million people, it was still a peasant army after all. It was normal to want some help from Dayao, but sending an envoy to Dayao was more interesting.
"In the name of King Ping!" Qing Lian smiled.
Upon hearing this, Ren Baqian tapped his fingers on the table as he pondered.
Great Xia had almost exhausted its vitality in the previous two wars with Dayao. In addition, corrupt officials imposed exorbitant taxes, and there were spies sent by Su Qing. People in many places had no way to make a living.
Su Qing started with the slogan "Equal rations!" This slogan swept a large number of people who couldn't survive. In addition, Great Xia was short of soldiers at that time, so it became popular in a short period of time.
Although Great Xia's elite soldiers were almost wiped out, there were still many valiant generals in the imperial court. After one or two years, they trained a group of soldiers who could fight. Although they lost half of their power, they gradually stabilized their position. At this time, both sides were in a state of tug-of-war, and it would be difficult to make a breakthrough in a short period of time.
Under such circumstances, Su Qing wanted to proclaim himself king!
Ren Baqian thought about it. In a situation where it was difficult to make progress in a short period of time, proclaiming himself king wasn't the best way, but it could also calm people down.
It would be reasonable if he sent an envoy after proclaiming himself king.
"As for more details, I will tell you when I have an audience with Her Highness in the afternoon." Qing Lian bowed slightly.
Ren Baqian nodded. In the afternoon, he would have an audience with Her Highness as an envoy, which would be a public affair.
Now, he was indeed here as a private person.
Unfortunately, why did he mention calculus?
"I want to borrow a few more books to read. You won't refuse me, right? Just now, you said that you saw my sincerity in learning … "Qing Lian said as she tucked her hair behind her ear.
"Go!" Ren Baqian waved his hand.
"Take your wooden board away!"
"I'll leave it here. If I don't understand it when I come again, I will have to wait for you to answer my questions when I return to the academy!" Qing Lian bowed again before retreating.
Ren Baqian sat in the chair, looked at the symbols on the wooden board, and felt his brain and teeth begin to hurt.
A long time after Qing Lian left, Ren Baqian carried the wooden board out, dug a hole, and buried it in it. Only then did he feel a little better.
He sat back in his office and began to ponder.
Although Qing Lian had learned mathematics before, it was at most at the junior high school level. When it came to Ren Baqian, she had systematically learned modern geometry and algebra in elementary and junior high school. He didn't expect to learn calculus now …
Without anyone to teach her, she had learned high school and university mathematics by herself … and had reached a very high level.
This was another cheat!
He had to admit that there were always some people in the world who were loved by heaven and earth.
For example, the empress was good at martial arts, Ning Caichen was on Earth, and this Qing Lian …
Huh?
Ren Baqian suddenly thought of something.
Ning Caichen and Qing Lian?
Did he only know two sword masters? Both of them were so talented? Wasn't this too much of a coincidence?
Did he meet even geniuses?
Ren Baqian suddenly remembered that 1,000 years ago, there was a magnificent period when thousands of sword masters were born and fought against each other, leaving behind quite a bit of fame.
However, that period was too long ago, and the records were vague, so he didn't think too much about it.
After that, sword masters were prohibited from entering the imperial court as officials.
The reason was very simple. Sword masters needed a lot of resources to build the Sword-cleansing Pool, so the possibility of corruption and bribery was too high!
In addition, sword masters had to spend a lot of energy to buy rare treasures for the sake of their lifespan. They even spent a long time searching for them in barren mountains and forests.
Naturally, they gradually became less eye-catching.
However, at this time, Ren Baqian suddenly realized a problem after having some doubts in his heart.
How many of the Spirit Wheel experts from a thousand years ago were recorded in the history books and spread throughout the world? Perhaps even the disciples of their own sects didn't know about them.
A thousand years and dozens of generations were really too long.
Sword masters didn't have a long lifespan, and there were very few Spirit Wheel experts. The number of sword masters was definitely less than that of martial artists.
Under such circumstances, being able to leave a heavy mark in history wasn't just because of strength, right?
Could it be that the sword master's skills were wrong? Even though they couldn't practice martial arts, they were far more talented than ordinary people in other aspects? If that was the case, it would be a little scary!
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