Friday, the last day of the weekday.

Whether it is an office worker or a student.

After spending today, there were two wonderful weekends.

Therefore, on Friday, everyone is often very happy and relaxed.

But this Friday, it seems a little different for students in the Department of Mathematics and Physics of Yan University.

As early as the last number theory class and quantum mechanics class, Chen Zhou's substitute teacher informed these students that there were surprises in the next class.

However, out of the idea of ​​creating a sense of expectation, the two substitute teachers did not tell these students what the surprise was.

Because of this, these students are on this day that should have been relaxed and happy and waiting for the weekend.

I actually had some expectations that were not part of this day.

For this reason, students in the mathematics department, before the morning's number theory class began.

Then they came to the stairs classroom early.

The purpose is to see what kind of surprise this substitute teacher will bring to them as soon as possible.

In the staircase, the students also discussed with each other what this substitute teacher would bring to him later.

So much so that the entire classroom was a little messy.

Until the door of the staircase classroom, a young man appeared.

At first, these students didn't care.

But when this young man walked into the classroom with the basic basic number theory textbook.

They realized how this person looked so familiar.

For a moment, these students did not react.

Because, they never thought that Professor Chen Zhou, who has never come to class, would appear in the classroom.

But it was only a moment.

After that moment, with a burst of cheers, the classroom immediately became quiet.

There was a look of excitement in every student's eyes.

They just wanted to tell the substitute teacher that this surprise was so big!

I noticed that before and after I walked into the classroom, there was a noticeably different noise value.

Chen Zhou couldn't help but smile.

Not bad, it's pretty good to maintain discipline.

After walking to the podium and standing, Chen Zhou put the textbooks on the podium, then raised his head and looked at the students below the podium.

These students were also staring at Chen Zhou in unison.

Chen Zhou cleared his throat and said, "Hello, classmates, I will take the class myself today, you..."

Before Chen Zhou finished speaking, the students in the audience said in unison: "Hello Professor Chen! We must listen to the class carefully!"

They welcomed their professors with the fullest enthusiasm.

Hearing this voice, Chen Zhou smiled again.

He felt that he shouldn't have to say anything later.

In order not to let down the enthusiasm of these students, it is better to start teaching as soon as possible.

"Okay, you guys listen to the class carefully, I'll give a good lecture..."

Chen Zhou said, and began to flip the textbooks to the page he had folded.

This is also the progress of students in the mathematics department in the course of elementary number theory.

"Please turn the textbook to page 65, which is the page of the basic knowledge of the consummation. We're starting to class..."

As Chen Zhou's voice fell, all the students flipped the textbooks together.

Turn to what Chen Zhou said, page 65.

During this process, everyone's movements were extremely fast, for fear of delaying for a second.

No one was willing to spend this class in a daze.

After all, this is Professor Chen Zhou’s class!

This is their idol, the role model of all Yan University students!

They have always been looking forward to Chen Zhou, who is the professor, who can teach them a lesson.

And now, when the expectations come true, how can they live up to this expectation?

"The basic knowledge of congruence in Chapter 3 can be combined with the congruence equation in Chapter 4..."

After taking a look at the marks he made in the textbook, Chen Zhou also started his formal lecture.

The formal lecture will naturally not be the same as his previous trial class.

The previous trial class was to show himself.

The current formal lectures are to impart knowledge to students more accurately.

However, ten minutes after the formal lecture.

Chen Zhou's lecture speed began to gradually accelerate.

This was not intentional by Chen Zhou, or what happened.

But because, when I was reviewing the textbooks and preparing for lessons last night, Chen Zhou found that the content was too simple.

Really, there is nothing to say.

This also made him unknowingly speed up the lecture during the lecture.

"About the basic properties of congruents and surplus systems, as well as the overall and extremely structure of surplus systems, are all very simple contents. I won't talk about it in detail, just look at it yourself..."

"I can tell you about the properties of this Euler function (m)..."

"In number theory, for the positive integer n, the Euler function is the number of numbers that are mutually pure with n in a positive integer smaller than n... The Euler function is also called the φ function, the Euler quotient..."

"The content of the Euler function is the following. The public key cryptography system is available. If you want to learn about this, just wait until you really want to engage in this research, and then go deeper..."

"About the concomitant equation, the content is similar to the basic properties of the concomitant and the residual system, and the depth is average, you can just take a look..."

"The following is the index and roots of Chapter 5..."

In more than half an hour, Chen Zhou unknowingly completed the teaching of two chapters of the textbook.

And he finally realized what is the happiness of a professor.

In the past, he didn't understand why these professors always teach like flipping books.

Now he understands.

In addition to the fact that the content is really simple, this kind of class is still quite fun.

Of course, Chen Zhou is also a course method based on a certain choice.

He didn't read all the books, but only left the impression of all self-studying for these students.

Chen Zhou fully played a role in detail and proper detail.

He did not leave any of the contents of the extension, and he unfolded them all and explained them in detail.

He would never take a second look at the content that should be said.

Otherwise, it means disrespect for time and disrespect for students.

"Well, the sixth chapter is the content of an indefinite equation, about an indefinite equation..."

After another quarter of an hour, Chen Zhou successfully passed Chapter 5 and began to march into the contents of Chapter 6.

Most of the students in the audience were able to keep up with Chen Zhou's lecture speed.

After all, if you want to gain a foothold in the mathematics department of the first department of Yanda Crazy Asylum, your own strength and pre-class preparation are essential.

They even felt that Chen Zhou had a good grasp of his lectures.
Chapter completed!