More and more students asked questions. Pei Zhi returned to the blackboard, wrote on it and then erased it. Chalk dust fell like snowflakes.

When it was Lin Chaoxi's turn, she no longer felt the nervousness and excitement she had when she first came.

Under Pei Zhiping's peaceful gaze, she briefly explained her purpose.

"What's the topic?" Pei Zhi asked.

His heart skipped a beat again. The sound was so beautiful that Lin Chaoxi wanted to rub his ears.

Restraining her excitement, she took out the question paper from her pocket and handed it over.

Pei Zhijing pressed his powerful fingers on the paper, took a look, put the paper down, took a half step back towards her, pinched the white chalk with three fingers, and wrote a number on the blackboard with a questioning look - 16

What do you mean it takes three or five seconds to make? It's not even half a second.

Lin Chaoxi was stunned, Pei Zhi still kept his questioning look. She realized that Pei Zhi was asking her if her answer was right, so she nodded quickly.

Seeing this, Pei Zhi placed his palm on the blackboard, casually erased the answer, and answered seriously: "For people who have studied mathematics for a long time, this question is not difficult, but it tests thinking and analytical ability. For people who have little contact with mathematics, it is very interesting."

"So, is it appropriate?"

Pei Zhi nodded.

Lin Chaoxi was very happy. Although the answer was brief, it was obvious that Pei Zhi was a very serious person after thinking about it.

A breeze blew gently, she thanked Pei Zhidao and tucked her messy hair behind her ears. There was no reason to stay any longer, so she turned and left.

The student union members from each school were behind the lecture hall.

Lin Chaoxi walked over and was surrounded by people asking about the result.

She repeated her words.

Someone responded quickly: "Is that the answer Pei Zhigang wrote on the blackboard?"

"yes."

“Not a human!”

Lin Chaoxi agreed very much.

They chatted for a while at the back door and basically finalized the topics for the quiz.

Lin Chaoxi took the opportunity to look at Pei Zhi a little longer.

Look at Pei Zhi's meticulous concentration, look at his wrist when he writes, look at the girls looking at him with starry eyes, look at this amazing classmate of hers...

But after watching for a long time, Lin Chaoxi gradually realized that Pei Zhi and she were not from the same world.

Although Pei Zhishi was always peaceful and polite from beginning to end, and never acted superior, her girlish heart, which was filled with joy before she came, became empty.

She suddenly saw the unreachable chasm between him and Pei, which came from the fact that one had been concentrating and accumulating for more than ten years, while the other had been living a life of idleness and waiting for death for more than ten years.

It's not shameful, but it's very disappointing.

The red glow in the sky had dimmed, and the people who had lined up in the classroom to ask questions had almost dispersed.

Pei Zhi picked up his coat that was hanging on a corner of the podium and began to pack his things.

"Shall we go too?" Su Xiaoming said.

Lin Chaoxi nodded. She had already talked to Pei Zhi and had been staring at him for so long, there was really no reason for her to stay any longer.

It's like fulfilling a wish.

She looked at the concrete floor in front of her and took a step forward, but her mind was filled with scenes from girl cartoons - she suddenly turned around and shouted, "Classmate Pei Zhi, I have liked you for ten years!"

But she didn't do it because she didn't have the courage.

More and more people left together, some through the back door and some through the front door.

The rubbing of fabrics against each other is very realistic.

Suddenly, a bright voice sounded: "Brother Pei Zhi, can we... ask you a... more personal question?"

Lin Chaoxi stopped as if he was saved and looked in the direction of the sound.

Pei Zhi was very frank: "Okay, but I have the right to refuse to answer questions that are too personal."

He put one hand in his pocket and held the test paper and manuscript paper in the other hand. The papers hung down and moved in the wind.

"Are you leaving?" the little school girl asked, "I mean... to study abroad?"

Hearing this, the girls in the classroom all exclaimed "eh" one after another. One reason was that they were surprised, and the other was that they felt that this was a great opportunity and they should gossip about it.

"Yes." Pei Zhi's response was simple.

"Which school?"

"CHU."

Lin Chaoxi's heart skipped a beat. If it weren't for her, Old Lin would have almost gone to this school. What a coincidence.

The girls' sighs of loss echoed. They probably couldn't explain why, but they just felt very regretful.

So someone asked, "Brother, will you come to school again in the future?"

"Why not?"

"But you haven't been here much lately."

“There will be even less in the future.”

“…”

"Will you still lead the team for this year's Mathematical Modeling Competition?"

"yes."

“Can we sign up?”

"Sure." Pei Zhi patiently added, "The school's official website has detailed rules for registration and selection of team members. If you're interested, you can go and check it out."

The "Ask a personal question" activity instantly turned into a consultation meeting, with students talking at once.

“We saw it!”

"But it's so perverted!"

"Brother, you are kidding us. There are no details. It's just one question!"

"What's the problem?"

After Pei Zhi asked the question, he unexpectedly walked to the blackboard, picked up a half-broken piece of chalk, and quickly wrote the question in the middle of the blackboard.

He wrote very casually, but Lin Chaoxi unexpectedly felt that Pei Zhi was very gentle at this time.

“We can’t do it!”

“This is too difficult!”

Before I finished writing the question, I heard wailing from the audience.

But for Lin Chaoxi, she could no longer hear any sound around her when Pei Zhi started writing the first stroke. Even Pei Zhi's figure disappeared from her sight. She could only see the question that was slowly taking shape.

It was long and difficult, and she understood some parts but was completely unfamiliar with others.

She was completely immersed in it, feeling confused and yet very challenged. She subconsciously turned over the information in her hand, took out a pen from her pocket, and wrote it down.

As she wrote, some very strange ideas continued to pop up in her mind, and she couldn't help but write them down.

"Hey, classmate Lin, are you solving the problem?"

Suddenly, someone shouted beside Lin Chaoxi, and she was startled.

An Xiaoxiao's voice was very loud, and in an instant, the eyes of the entire classroom were focused on her.

Pei Zhi had already walked to the door, stopped and looked at her.

Lin Chaoxi's first reaction was embarrassment. What was she doing?

A girl from the philosophy department tried to solve a problem posed by the campus idol in the mathematics classroom. The scene was so presumptuous and so sour.

She looked at Pei Zhi angrily.

Pei Zhi's eyes were still clear and insightful.

There are always some people who make you want to be like them just by looking at them.

Lin Chaoxi calmed down quickly. What was there to be afraid of?

"Let me copy the questions." She said to An Xiaoxiao.

"Senior sister really wants to join Pei Zhi's team?" An Xiaoxiao glanced at the male idol at the door, "No wonder senior sister took the initiative to ask Pei Zhi questions just now..."

"Be diligent in study and ask questions."

"No, no, no, I don't think so. Isn't she studying philosophy?" An Xiaoxiao paused and raised her lips. "You are trying so hard to solve math problems. Could it be that you have a crush on Pei Zhi?"

At this point, she was no longer a psychopath. The students around her looked at her with sympathy.

Lin Chaoxi really didn't care about An Xiaoxiao's squeeze, but at that moment, in that situation. In the distance was Pei Zhi's handsome figure, and the light of the setting sun was hazy.

She suddenly smiled, turned to look at An Xiaoxiao, and asked, "Hey, how did you know?"

Silence, it was an unbearable silence at first, the students looked at each other, they didn't expect to hear such an exciting confession in the last class. Then, someone burst out laughing, and then the whole classroom burst into laughter.

An Xiaoxiao was very proud at first, but gradually, she found that the students around her were not mocking anyone. The students were very happy, some applauded, and some even whistled.

Lin Zhaoxi was frank and laughed.

At this moment, Pei Zhi moved. He put one hand in his pocket, his coat casually draped over his hand, and climbed up the stairs from the classroom, and soon stood in front of them.

The whole classroom fell silent again.

Lin Chaoxi was stunned when she saw Pei Zhi's handsome face. What do you mean?

Pei Zhi himself did not think there was anything wrong with this, so he asked casually, "Are you solving it?"

"Just... write down your thoughts?"

Someone in the classroom took a breath of cool air.

Lin Chaoxi realized that her answer was too immodest, and quickly changed her words, "I just copied down the questions and went back to study them."

"Can I take a look?" Pei Zhi said.

Lin Zhaoxi's heart began to beat uncontrollably again, but Pei Zhi's expression was still clear and natural, as if she didn't care at all about her public confession. But it was true, it sounded like a joke, how could the male god care.

She felt even more relieved and dropped the white papers in her hand and passed them over.

Pei Zhi took it with his slender fingers, and she could clearly see the small shadow under his eyelashes. The next second, Pei Zhi actually read carefully the solution she had written down.

Soon, Pei Zhi raised his head and whispered to her: "Fisher linear discriminant function?"

"ah?"

"Complete solution category?"

She shook her head.

"That's pretty good."

Pei Zhi handed the draft paper back to her, nodded at her, then put his hands back in his pockets, turned and left.

The whole process happened so quickly that Lin Chaoxi didn't even understand what had just happened, but people were asking her questions everywhere.

"Senior sister is so strong, my idol said you are very good, can I see your ideas?"

"What did Pei Zhigang tell you?"

"Are you really from the philosophy department?"

Lin Zhaoxi could hardly hear any sound around her. She withdrew her gaze from Pei Zhi's back and looked at the draft paper in her hand again.

After calming down, she was sure that the fleeting expression she saw in Pei Zhi's eyes just now was regret. It was possible that Pei Zhi was inspiring her, whether it was "function" or "classification". But she couldn't even repeat the term Pei Zhi just said.

Already...very good...

For a philosophy student, it's pretty good.

Lin Chaoxi suddenly felt sad, because at that moment she realized very clearly that the distance between her and this question was equal to the distance between her and Pei Zhizhi.

In other words, it seems close at hand, but in fact it is out of reach.

She couldn't stay any longer. She handed the manuscript in her hand to the boy who wanted to read it, said hello to Su Xiaoming, and left through the back door, following the flow of people in another direction.

When she was almost at the end of the corridor, she took a deep breath and turned back to take one last look at Pei Zhi.

In her sight were the gaps between people, youthful smiles and colorful clothes, but at that moment, what she saw most clearly was Pei Zhi's fingertips and the white chalk dust on his clothes.

The last clear rays of day fell upon him.

That's great.

Lin Chaoxi turned his head and looked at the sky in the distance.

It turns out that the plot will not undergo any qualitative change due to the sudden pause.

They will eventually drift apart just like they are now, and never meet again in their long lives.