To be honest, Yunyan has a good impression of this teacher.

After all, I made mistakes first.

When others speak on the stage, it is the most basic respect for the speaker to not speak and listen carefully.

It's just that my ideological level has not risen to the point where I am so serious about academics.

That's why it offends the speaker.

Yunyan apologized sincerely first, and then talked about the walk.

"Teacher, I am only interested in mathematics now, and I don't have the passion to study it for a lifetime."

So, she didn't come to sign the contract, not because of the school.

For personal reasons.

Serious teachers can't understand Yunyan's thoughts.

—What’s not to like about mathematics? How good is it to devote a lifetime to it.

However, everyone has their own way.

The little girl is still young, so it's not bad to think so much.

"Do you have an email or something? I will record it. If there is any cutting-edge literature in the future, let the students copy it for you. If you don't know it, you can email me."

Yunyan quickly agreed.

She also mentioned the literature she had read recently, and the teacher summed it up for her on the spot.

Then recommended several monographs to Yunyan.

Before parting, the teacher said, "Aren't you very passionate about mathematics?"

Yunyan: "…"

The teacher said again, "I don't force you to recommend it. The books I just recommended to you are only recommended for graduate students. Try it now, if you want to go deeper For research, you still have to study in the Department of Mathematics and have professional knowledge to lay the foundation."

After all, to build a skyscraper, you must first lay the foundation.

Yunyan felt that this teacher really took care of her heart.

Her sincere thanks again.

After speaking, Yunyan followed the other students to gather.

Mr. Zhang has known this serious teacher for many years, and they talked for a while.

"The books you recommended to Yunyan are really difficult."

The difficulty is so great that he, who only studies the Olympiad, has heard of several books.

The serious teacher said, "Don't young people like to be competitive? You student, if you don't understand, you will ask me, and then I will let her enter our mathematics department."

Mr. Zhang: "..." I can think of this in a short time.

Admire.

After eating in the cafeteria at noon, Teacher Zhang took everyone to sit on the lawn by Weiming Lake.

It's called 'Outing'.

All the students present were twitching their mouths, as if struck by lightning.

“Outing…”

"It turns out that this is outing, I learned it."

Qian Xingwei sat next to Yunyan and said, "With this free time, we might as well turn the Rubik's cube for a while."

He was professionally trained as a child.

Whether the fifth or fourth order, or even the pyramid or hexagonal magic cube, Qian Xingwei has a way of turning.

Qian Xingwei can also see that Yunyan is purely from a wild road.

She can turn so fast, purely because she is smart and her brain responds quickly, so she can calculate the steps of turning the Rubik's cube in a limited time.

But Qian Xingwei is also happy to share her experience and methods.

It's just that the time was limited before, and I was busy listening to Mr. Zhang's new IMO questions every day, so I didn't have time.

Lu Lin heard Qian Xingwei's words.

I moved my seat on the spot. Instead of sitting next to him, I moved to Yunyan's side.

—Qian Xingwei is too devilish, but Yunyan is more cute.

How can I know that Lu Lin is still too young, the most devilish talent is not Qian Xingwei.

It's Teacher Zhang.

I saw him open the schoolbag he was carrying and took out a bunch of Rubik's cubes.

I took out an hourglass.

Teacher Zhang turned the hourglass upside down happily.

"Don't you always say that you don't have enough time to play Rubik's cube? Let's play as much as we like this afternoon."

Students: “…”

Maybe this is the generation gap.

Mr. Zhang asked everyone to come and choose, the third-order and fifth-order ones are more popular.

Because these two rotations are quite a routine, first align the center color, and then make adjustments.

Although the fourth-order Rubik’s Cube does not sound as powerful as the fifth-order Rubik’s Cube, the possibility of path change is more than the fifth-order Rubik’s Cube to restore it.

And there are fewer useful routines.

So, in general, the fourth-order Rubik's cube is actually a bit more difficult than the fifth-order one.

The only two fourth-order Rubik's cubes in Teacher Zhang's backpack finally fell into the hands of Qian Xingwei and Fang Yunyan.

In the beginning, everyone also discussed the skills of turning the Rubik's cube.

Then coach each other.

Thirty minutes later, they all gathered around Yunyan and Qian Xingwei, watching them race to see who turned faster.

Teacher Zhang also held up his holy hourglass and approached.

"This hourglass is ten minutes, see who of you can recover within this time."

Yunyan: "…"

Qian Xingwei: “…”

Students: "..." Teacher, you are really too young.

Turn a fourth-order Rubik's cube, these two bosses can't use it for five minutes.

However, the fun of a Rubik's Cube is not how fast it can be restored.

It is the process of deriving the restoration every time the pattern is disrupted.

About half an hour later, Teacher Zhang put away the hourglass angrily.

He thought, he must return it, it looks good and buy it back, it is useless.

The spring breeze was blowing, and a group of students, who were jumping on the edge of adulthood, sat by the lake.

I watched the girl in a distressed denim jacket turning the Rubik's cube seriously.

The girl lowered her head, and her long eyelashes could not hide the seriousness in her eyes.

The cube fell on the lawn.

Someone next to me took a mobile phone and ordered a stopwatch.

"Damn it! One minute and thirty-one seconds! Yunyan took less than two minutes! It was faster than Brother Wei just now!"

"Yunyan is really awesome!"

"The first place is the first place, it's really awesome."

"Yunyan is really a good goddess, I have never seen a girl play Rubik's cube so awesome."

"Come on, don't be emotional, let's see Brother Wei again, the timer starts!"

At four o'clock in the afternoon, Mr. Zhang announced the end of the first spring outing.

Everyone stood up from the lawn.

"Mr. Zhang has a good heart."

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