Li Lechen felt cheated. He had only copied Cheng Xixi's words without memorizing them or explaining them.

"Please come up."

Zheng Fangxing had already started writing the problem on the blackboard, and even drew a standard diagram using a ruler and compass. It's worth noting that with nearly thirty years of experience teaching mathematics, Zheng Fangxing could draw most diagrams perfectly freehand.

There's no time left.

Countless options flashed through Li Lechen's mind, including starting a live stream, but all were rejected because there wasn't enough time and the information was too chaotic.

Should I pretend to faint?

"Li Lechen, please explain your solution to your classmates." Zheng Fangxing smiled brightly, but Li Lechen saw something wicked in his eyes.

Suddenly, an idea struck me.

So he pretended to bend down to tie his shoelaces, turned on the live stream, and clicked on "personal items".

The "tightening spell" was applied to Wu Qunfang yesterday, and there are still eleven left. It seems that only Old Man Zheng can suffer one of them.

So I clicked to claim it.

[Confirm whether to use one set of the "tightening spell"?]

confirm.

The stimulus is already in your hands; the activation spell is "Who the hell came up with this question?", and the deactivation spell is "Call me daddy."

"......"

Is this headband really not a joke?

Li Lechen requested a different incantation. He reasoned that if he were to utter the incantation aloud, Old Man Zheng would likely explode on the spot.

"Once the 'tightening spell' is confirmed to have been created, it must not be activated again until it has been fully used."

The platform's after-sales service responded bluntly.

Well, I guess I'll just have to bite the bullet and go for it.

This was the first time Li Lechen had ever gone up on stage to solve a problem in front of everyone. Because a poor student like him would never have the opportunity to go up on stage to give a demonstration, but since he didn't cause trouble, the teachers usually wouldn't use him as a negative example.

The feeling of being under the spotlight is a bit awful.

Moreover, you also need to cast that activation spell.

Moreover, this time the trigger, perhaps to complement the activation spell, was much more treacherous than the previous one—it was actually half a piece of chalk.

How do I get this chalk into contact with Old Man Zheng's body? And at the same time, I need to cast the activation spell?

Before I could figure out the answer, another piece of chalk was handed to me.

Following the chalk, one still sees Zheng Fangxing's radiant smiling face.

Seeing this, Li Lechen squeezed the piece of chalk out of his palm and gestured, saying, "Teacher, I have chalk now."

"Okay, then you can begin."

Facing the problem on the blackboard, even though I had done it yesterday, I was still completely baffled and didn't even have the courage to write down a single solution.

"Smack!"

Suddenly, Li Lechen slammed the chalk down and angrily shouted, "Who the hell came up with this question?"

The moment he threw the chalk and shouted, the whole class was stunned. Zheng Fangxing was completely bewildered. The chalk bounced beautifully off Zheng Fangxing's leg and landed on the ground.

Li Lechen was startled: Could it be that the stimulant will stop working if it falls to the ground? Besides, the chalk is so big, there's no way to put it on Lao Zheng.

Time suddenly froze.

A few seconds later, Zheng Fangxing spoke: "You...you just now..."

Ouch!

Li Lechen suddenly bent over and hugged his leg, his expression turning painful as he tried to pretend that he had a leg cramp.

"Straighten your legs! Straighten them!" A student immediately reacted and shouted from below.

"Bend your big toe with your hands!"

"Don't bend over like that."

...

Ouch!

Suddenly, there was another sound.

Zheng Fangxing bent over and hugged his leg, looking pained, as if he too had a leg cramp.

The whole class was stunned, and even the students who had been giving Li Lechen advice were speechless.

What's going on?

Why did Old Man Zheng also get a leg cramp after Li Lechen got one? It's not like yawning is contagious.

However, Zheng Fangxing's condition seemed more serious than Li Lechen's. Not only did he keep groaning, but after a dozen seconds, he was unable to stand and sat down on the bed, hugging his legs and groaning.

Helpless, Li Lechen could only sit on the ground and hug his legs, groaning. In any case, he had his "leg cramps" earlier than Old Man Zheng, so the fake news wouldn't affect him.

Then, the whole class went into chaos. Some students crowded around the podium to try to help the two straighten their legs, some ran to the infirmary to beg for mercy, and some even called 120 (emergency services).

However, Zheng Fangxing was in real pain. It was a kind of pain that was hard to describe. It felt like a cramp, but not quite. It also felt like his bones were about to break. And the pain was getting worse and worse, but it didn't go to the point of numbness.

We really need an ambulance; we can't do it without one!

Finally, the school clinic staff and the hospital's 120 ambulance arrived.

Facing two groups of doctors, Li Lechen said that by straightening his leg and forcefully bending his big toe, he had almost controlled the leg cramp and felt much better now. At most, he would just need to rest in the infirmary.

Zheng Fangxing screamed even louder and was completely unable to move, so he had to be put on an ambulance stretcher.

Well, that's terrible. The first math class was supposed to be about explaining the math test, but before class even started, the teacher was rushed to the emergency room. The students really don't know whether to pretend to be sad or cheer from the bottom of their hearts.

Li Lechen also stayed in the infirmary to "rest well" because of his illness.

The infirmary is the most relaxed place in the school. Both the doctors and the students inside enjoy a comfort and ease that is completely different from the high temperature outside and the tension in the classroom.

Besides the nurses who came to check on Li Lechen from the two classrooms, there was also an older female doctor. The female doctor asked Li Lechen a few questions, such as whether he usually experienced this, what he ate for breakfast, and how much he exercised, and then easily diagnosed that it was a leg cramp caused by "calcium deficiency".

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