When it was time to go to school in the afternoon, Duan Yun came a little late, because he had too little sleep last night, which caused him to oversleep directly in the afternoon.

Almost running wildly, Duan Yun finally managed to rush into the classroom the moment the class bell rang.

This made Qin Chenghai, who followed him into the classroom, look quite ugly, since the last time he made a bet with Duan Yun, he had begun to hate Duan Yun.

Today's Qin Chenghai is still wearing a straight suit, iconic silver wire glasses, his hair seems to have been sprayed, meticulously combed, and his expression is calm and indifferent, as if he has not been affected by the incident between him and Duan Yun yesterday.

In the eyes of others, Qin Chenghai's appearance can definitely be called a teacher, and he is full of anger, but in the eyes of Duan Yun, who already knows his details, it is most appropriate to describe him as a 'well-dressed beast'.

If Duan Yun wants to go to Tsinghua University and Peking University, his math grades are of course very important, but for him, who is already a master of mathematics, there is no need to take high school math classes at all.

But he couldn't take any other subjects in math class, so sleeping seemed to be a good choice, and he could study other subjects better.

Moreover, the classmates in the class all knew that Duan Yun was in poor health and had always had the 'habit' of sleeping in class, so this made Duan Yun even less psychologically burdened.

So he put his math textbook on the table, rested his head on it, and closed his eyes.

Although Duan Yun's body is much stronger now, he was so excited last night that he only slept for less than four hours, and he needed to take a nap to replenish his sleep.

Soon, Duan Yun's slight snoring echoed throughout the classroom.

The students in the class were not surprised by Duan Yun's 'audacious' action of daring to sleep soundly in the class teacher's class, and they were even accustomed to it.

And after Tang Yan saw Duan Yun's somewhat unbearable sleeping appearance, her brows furrowed slightly.

As for Qin Chenghai, although he had often physically punished Duan Yun for sleeping in class before, but since Duan Yun accidentally fainted twice, Qin Chenghai no longer dared to punish him too harshly, after all, Duan Yun was a well-known 'glass man', and if someone died, he would have to go to prison.

But this time, when Qin Chenghai saw Duan Yun lying on the desk again, a trace of resentment flashed in his eyes.

"Duan Yun!"

A roar came from the podium, and everyone instantly shifted their eyes to Duan Yun's body.

"Don't make trouble!" After being woken up by Luo Yan, who was sitting next to him, with his hand, Duan Yun opened his worried eyes and muttered for a while.

"Duan Yun, did you hear me!!"

Qin Chenghai's tone was almost roaring.

"Eh, are you calling me?" Duan Yun rubbed his eyes and stood up.

"Duan Yun, do you treat this class as a hotel? You will sleep in the first class early in the morning! Do you still want to learn this after all......" Qin Chenghai scolded Duan Yun with his head and face,

"Wait!" Duan Yun saw Qin Chenghai spitting on the podium, and made a gesture to stop.

"What, you're not convinced!?"

"Teacher, I want to ask, if I have learned all the high school math courses, does that mean that there is no need to take your class?" Duan Yun Zhengse said to Qin Chenghai.

In fact, Duan Yun would not normally make such rude remarks to a substitute teacher, but he understood the filth under Qin Chenghai's mask, so he had no respect for Qin Chenghai for a long time.

"Learned all the high school math courses?" After Qin Chenghai heard this, he couldn't help but sneer and said, "Have you been sleeping stupidly for too long?"

"Teacher, please pay attention to the tone of your voice, I am telling the truth, you can be suspicious, but you can't insult me. Duan Yun raised his eyebrows and said to Qin Chenghai.

As soon as Duan Yun's words fell, the students in the class were stunned in surprise, no one could have imagined that Duan Yun would actually confront Qin Chenghai in front of him.

You must know that Qin Chenghai is very strict in his studies, and he usually says the same thing, and no one has ever dared to make a mistake in his class.

Even when Duan Yun was in poor health before, he had almost fainted by his corporal punishment several times, and as for the others, they were even more trembling in Qin Chenghai's class, and they didn't dare to come out of the atmosphere.

So when everyone saw Duan Yun openly contradicting Qin Chenghai in class, everyone's first reaction was: This guy is crazy!

Even Luo Yan and Guo Qing, the two sworn friends beside Duan Yun, were shocked with a look on their faces, looking at Duan Yun and speechless.

"Okay, good!" Qin Chenghai laughed angrily and said to Duan Yun, "You mean you've learned the entire high school math class, right?"

"That's right, that's what I said. Duan Yun nodded.

"Then I'll give you a test paper for your third year of high school, and if you answer incorrectly, get me out of school right away, and never come back!"

As soon as Qin Chenghai's words fell, the students in the classroom suddenly gasped in unison.

It's too big to brag about!

You can complete all the courses of the third year of high school by yourself in the first half semester of high school, even a few top students in the class can't do this, not to mention that even if you can really learn and play the whole three years of high school mathematics on your own in the first year of high school, who can guarantee that you can answer the entire third year of high school exam paper correctly?

For a while, the students in the class all flashed the same ending in their minds, that is, Duan Yun would definitely be expelled.

You must know that Qin Chenghai is not only the head teacher of the first and second classes of high school, but also the deputy director of the school's academic affairs office.

"But what if I get all the answers right?" Since Duan Yun won Qin Chenghai in a bet in a self-study class last time, he already had a strong confidence in his mathematical ability, and he didn't seem to worry that he would answer the wrong exam paper.

Just kidding, a master-level math mastery college exam paper is no problem, let alone a mere high school exam paper.

"I don't deliberately make things difficult for you, didn't you sign up for the Olympiad before, then I'll find you a test paper for the Olympiad this time, all of which are at a higher level, if you can answer all of them correctly, you can sleep casually in my class!" Qin Chenghai roared loudly at Duan Yun.

That's it. Duan Yun raised his eyebrows and said without thinking about it.

"Wait!" Qin Chenghai looked at Duan Yun with a flash of smugness in his eyes, and turned around and left the classroom.

"Duan Yun, you are probably going to finish the calf this time. Seeing Qin Chenghai leave the classroom, Luo Yan on the side said to Duan Yun with a bitter face: "Today, this Qin Chenghai deliberately dug a pit for you to drill into!

"That's right, and it's still an Olympiad paper, I'm so big, I haven't heard of anyone who can get a full score in the Olympiad exam, and if you can pass, you're already a master. Guo Qing also said to Duan Yun at this time.

"Duan Yun!" At this time, Tang Yan, who was sitting in front, also turned her head and said to Yun a little nervously: "Hurry up and apologize to Teacher Qin, dropping out of school is not a joke!"