Alone in a huge office, Wang Yufei was stunned.

I'm still a little unaccustomed to it.

Han Xu was dissatisfied with Wang Yufei's honesty and desirelessness, but at this time, he happened to be able to show the Buddhist side of this child. Buddhism pays attention to a casual fate, and if it comes, it will be safe. Since Han Qian gave him two math problem books, let's read them first.

There is only one problem, and after another day, Wang Yufei seems to be reading the book faster.

How fast?

In fact, it's not that fast, and it can't be compared with the quantum fluctuation speed reading method. If it needs to be described, Wang Yufei's reading method can be described by focusing on the photo reading method. With the blink of an eye, this side of the story can be remembered in your mind, and even the thought process of drawing inferences from each other can be included.

Wang Yufei, who was reading a book, didn't feel anything wrong, but at this time, if there were outsiders, he would feel very dazed.

Although I am very serious about turning the pages of the book, I will immediately turn to the next page at a glance, and at the same time my eyes are still blinking rapidly, which will give people a strange feeling.

Fortunately, the teacher hasn't come at this time, otherwise there is a high probability that there is something wrong with this child's head.

In fact, when Wang Yufei did feel that he really had something wrong with his brain.

When the two books of math study problems were finished, a lot of graphs and sequences appeared in his mind completely uncontrollably.

From simple planes to more complex three-dimensional figures, point to point, point to surface, point to space...... Eventually, countless points form a variety of irregular and non-stop moving objects, and countless formulas are born from them.

"Well, who are you, what are you doing here?"

When Wang Yufei's brain was still popping up various models and formulas, a middle-aged man who already had a Mediterranean development trend pushed the door and walked into the office.

The man's image looks somewhat similar to that of Principal Liao, his alma mater, which also made Wang Yufei's heart full of intimacy, and he quickly stood up and replied, "Hello teacher, my name is Wang Yufei, and Aunt Han asked me to wait for her here." ”

"Oh, Han Qian, which class are you from?" the man asked, touching his head.

"I'm in third grade. Wang Yufei thought for a while and replied.

The alma mater of Daowang Village has one class per grade, which is naturally not as meticulous as the schools in the city.

"I know you're in the third grade, I ask you which class you're in?" the middle-aged man asked solemnly.

"There is only one class in the third grade, teacher. Wang Yufei replied honestly.

"Which school are you talking about?"

"Daowang Village Elementary School. ”

"To Wangcun Elementary School?"

"yes!"

......

The middle-aged man touched his head again, and waved his hand at Wang Yufei in confusion: "Okay, you can sit and wait for Teacher Han first." ”

Then he sat down at the desk across from him: "Hey, where's my book?"

"Teacher, are you talking about these two exercise books?" Wang Yufei picked up the two books that Han Qian had just given him time to pass the time and asked.

"Hmm, do you understand?" the middle-aged man asked in surprise.

"Like, it's quite simple?" Wang Yufei replied tentatively.

He really thinks it's quite simple, and many of the questions are basic. If there is anything he hasn't figured out, it's probably some knowledge points that extend from these topics.

Some of them are very open-ended, and in a two-dimensional environment, they can be solved in a variety of ways. But once introduced into 3D, from the surface to the body, it will be many times more complicated. But even so, Wang Yufei felt that he could solve it.

And Wang Yufei does not have a correct understanding of his ability at this time.

For example, at this time, he felt that since he could solve these problems after reading them once, of course it should be quite simple.

"It's pretty simple?" Wang Yufei's words almost amused the middle-aged man opposite.

For Lao Han, who has been teaching mathematics for more than 20 years, math problems are not simple, and of course he has his own judgment.

Wang Yufei's two books are the latest high school Olympiad plane geometry intensive training problem sets, and the difficulty is naturally extremely high.

The reason why the No. 1 Middle School in the provincial capital took great pains to poach Lao Han was not only because of his rich teaching experience, but also because of his ability to cultivate Olympiad seedlings.

Lao Han is a bull who once served as an Olympiad coach in the Olympiad provincial team, and has cultivated several national Olympiad gold medal seedlings. The high school mathematics Olympiad award can often allow children with this expertise to take the path of self-recruitment, increasing the admission rate of the school's prestigious schools.

"yes, it's easy. Teacher, do you still have to learn such a simple question in high school? You can figure out the answer in your head. Wang Yufei asked curiously.

"That's the case, I have the same surname as Han Qian, my name is Han Wenle, isn't the contemptible person the math teacher of the school, since you think these topics are very simple, why don't we discuss them today?" Han Wenle said with the corners of his mouth tugging at his teeth.

Under normal circumstances, Lao Han would not be so idle, but who made Wang Yufei's attitude angry today?

Of course, he can solve the problems in both problem books. But it also needs to be calculated to find ideas.

This kid just came here this morning, and after flipping through the question book, he dared to say that he could get the answer even if he thought about it? Okay, let's learn such a simple thing in high school? This is to rub his face on the ground!

"Okay, Teacher Han!" Wang Yufei nodded honestly, he hadn't learned to read words and expressions, and he didn't notice the murderous aura in Old Han's smile.

"That's it, I'll give you a debut question, and you can solve it. ”

After speaking, not giving Wang Yufei a chance to react at all, Han Wenle casually took out a piece of manuscript paper from the desk, picked up the pen and wrote down a plane geometry problem that had stumped him before, and then handed it over.

"△ABC, AB is greater than AC, AD bisects BC, E on AD, EF cuts △ABD circumscribed circle and F, EG cuts △ACD circumscribed circle and G, straight CF intersects BG and point J, crosses point J to make parallel lines of BC, respectively intersects FD, AD, GD and H, K, I three points. Verification: HK=JI. ”

Wang Yufei glanced at the question, and lines and dots had already appeared in his mind.

"Mr. Han's question is also very simple, BF and CG do extension lines, you will find that both lines will intersect with AD at the same point, if you want to prove, you can ...... like this"

As he spoke, Wang Yufei began to draw a sketch on the straw paper, and then began to write out the argument process. Two minutes later, Wang Yufei handed the manuscript paper to Han Wenle.

Old Han was surprised to take the answer to the problem handed by Wang Yufei, and was stunned for a moment.

Of course, it's not that Wang Yufei didn't solve it well, but it was too good, and the solution method was very peculiar, not to mention the complete graph, and by the way, he also proved the wire harness theorem......

This directly led to the answer being a bit cumbersome, but Lao Han had to admit that he couldn't find a trace of error or omission at all.

Wait, this way of solving the problem seems familiar?

"Yesterday, you tutored Teacher Han's daughter with math problems?" asked Han Wenle patting his head.

"Well, yes, Mr. Han!"

"You're an elementary school student?"

"Yes, Teacher Han, the third grade of Daowang Village Primary School!" Wang Yufei replied confidently.