It was only when Lao Lin called her "Teacher Xiao Lin" that Lin Chaoxi realized it was time for her to go to class.

She was still in a state of confusion and stood up woodenly. Pei Zhi also looked up at her.

Seeing the boy's inquiring eyes, Lin Zhaoxi smiled and said, "Good luck!"

——

Lao Lin’s Olympiad mathematics class for junior high school students…was opened because it was so popular.

Lin Chaoxi was once a teacher training student and passed the podium in the morning.

Before she stepped onto the podium, she thought that taking an Olympiad math class would not be a big problem for her.

But in fact, the students that Lao Lin taught, even though they were only for a few short classes, were really very different.

"Who are you?"

"What are you doing standing on the podium?"

"Where's Lao Lin?"

"I'm your new math teacher. My name is Lin Chaoxi."

“Why are you teaching us?”

“Because I’m good at math.”

"We want to test you!"

Lin Zhaoxi: “…”

She always felt that there was a trick here, but she could only say, "Okay."

In a flash, every child took out a piece of paper at the same time. The sound of chattering continued: "I ask first, I ask first!"

Lin Chaoxi scanned the rows in front of him and found that the papers held or placed by the children all had a question written on them. They were obviously well prepared and not just thinking about it on the spur of the moment.

"Did Old Lin tell you to do this?" Lin Chaoxi complained in her heart. What was he saying about asking her to teach graph theory? That was nonsense.

"Lao Lin won't let us say it was him!"

"Yes! Lao Lin won't let us say it!"

"Okay..." Lin Chaoxi said, "Write your own names on each piece of paper and hand them in so I can see them."

The children were very obedient. They wrote their names quickly and handed them in one after another.

Lin Chaoxi sorted out the 30 sheets of paper and read them through from beginning to end. The math problems that primary school students can encounter are at most those in junior high school. They are not difficult, but some are quite interesting.

The classroom started to get noisy. The kids obviously felt that it would take her a lot of effort to finish the 30 questions, so she definitely didn't need to attend the class.

She roughly categorized the questions, turned around, picked up the chalk, and wrote down the first question, then the second question...

The chalk and the blackboard rubbed against each other, making a squeaking sound, and the classroom gradually became quiet.

Lin Chaoxi wrote six questions on the blackboard in one breath. When she turned around, the children were staring at her.

"Then let's start doing the questions. These six questions are provided by Jiang Ran, Qu Ting, Xu Xu, Chen Mu, Wang Xiaoxiao, and Bao Yi. Let's thank them."

The children clapped woodenly.

There were also smart little students who shouted: "Teacher, what are you doing?"

"Let's do the questions together." Lin Zhaoxi smiled, "Of course we should share the questions we have worked hard to find."

"Ah... we want to do it too?"

"Um."

"But I'm testing you!"

“But I’ve done it.”

"Liar!"

"Really, I've done it all in my head." Lin Zhaoxi smiled, "There's still more than half an hour left in this class. You guys try to think about these six questions. I'll write down the answers to all 30 questions and hand them to each question setter. You guys will mark the papers. Is that okay?"

"It seems... possible..."

"But I asked question 5, and I know the answer!"

"Yes, so next, you will be the one to explain the fifth question, so you should think carefully." Lin Chaoxi paused, "Every child who asks a question must come to the stage and explain the question you asked to others."

"I...I can't do it. This question is so difficult!"

"It doesn't matter. I gave the correct answer. You can take a look and try to understand it. If you don't understand, I will teach you." Lin Zhaoxi smiled.

"Teacher, you look a bit like Lao Lin." a student said.

"Like where?"

"It seems a bit shameless."

"It's hereditary." Lin Zhaoxi said.

The person who asked the fifth question, named Wang Xiaoxiao, kept saying "but" for a while, and the other children seemed to have given up resisting and lowered their heads to look at their own questions.

After all, they were students taught by Lao Lin, and most of them were probably used to this sudden routine.

Lin Chaoxi also moved a chair, sat in front of the podium, borrowed a table from the children in the first row, and began to answer questions.

For a while, the only sounds in the classroom were small-scale discussions and nodding heads.

In fact, Lin Chaoxi probably knew that the reason why Old Lin asked the children to prepare questions to test her was because he was afraid that she would not be able to calm the students in the first class.

So he chose this form of free thinking and discussion class to let students understand her strength and let her and the students get to know each other gradually.

——

Lao Lin’s Olympiad mathematics class usually lasts the entire morning.

During lunch break, Lin Chaoxi returned to Lao Lin's office with a hand full of chalk dust. Pei Zhi and Lao Lin were still working, and it seemed like they had been doing this for several hours.

The trees in the yard are dark green, and in early autumn there are even light cicada chirping.

Only when they heard footsteps did they put down their pens and look up.

"Are you back?" Lao Lin asked casually.

"Thank you for your hard work." Pei Zhi said.

Lin Chaoxi patted the dust off his hands, looking like he had done a great job: "I'm going to eat wontons. I want two bowls, one with shrimp and one with mustard greens."

"Bring me a bowl of mustard greens." After ordering the food, Lao Lin waved his hand to signal her to leave. He was probably getting into the work mode and wanted to work for a while longer.

"What does Teacher Pei want?" Lin Chaoxi asked.

"I'll accompany you." Pei Zhi said.

The wonton shop was the one they loved since elementary school.

It's rare that the taste hasn't changed after all these years, and it's still steaming hot at noon.

The only problem was that, as business was booming, the boss forced the store to add a third of tables.

Pei Zhi has long legs, and Lin Chaoxi sat face to face with him, with their legs almost touching each other.

The wontons came and Pei Zhi ate them quietly.

Since they were already so familiar with each other, Lin Chaoxi was not shy. She scooped wontons while looking at Pei Zhi with her chin in her hand.

Pei Zhi behaved normally from beginning to end today. But Lin Chaoxi really wanted to ask him, "Does your mother know that you are going out to study mathematics?"

This question has been on her mind for several times, but she couldn't think of the right time to ask it.

So much so that she was still thinking after they finished eating the wontons. Pei Zhi reached out to the waiter and asked for two more bottles of Coke.

"Still drinking?" Lin Chaoxi didn't quite understand.

"Let me show you a little while longer."

"!!!" Lin Zhaoxi blushed instantly.

Maybe Pei Zhi made this joke because he saw her anxiety.

Lin Chaoxi was a little nervous at first, but soon she calmed down. She held a half-drunk Coke in her hand and chatted with Pei Zhi as they walked.

"What do you think of Comrade Lao Lin's work?" she asked.

"It's OK." Pei Zhi thought for a moment and said, "Verification is a meticulous job and takes time."

"Then do you have time?" Lin Chaoxi paused, "Don't you need to accompany Mom when you go out today?"

Pei Zhi stopped and looked at her.

"Why didn't you tell me at summer camp?"

"It happened suddenly and I haven't thought it through yet." Pei Zhi said.

"No." Lin Zhaoxi shook his head, "My brother Pei is not the kind of person who would 'not think it through'."

Pei Zhi drank a sip of Coke and continued walking forward: "Want to hear the truth?"

"Oufu is dead!"

"You were very busy and hardworking every day at that time. If I told you this, you would obviously spend a lot of time caring about me," Pei Zhi said.

"You think that caring about problems that cannot be solved will not solve them, so I should not waste my time and energy on you?"

“That’s right.”

Lin Chaoxi stopped and looked at Pei Zhi carefully.

She didn't know whether Pei Zhi's words were sincere or just a seemingly reasonable explanation he chose to cover up the promise he made to his mother.

She thought for a while, hooked her finger at Pei Zhi, and said, "Come with me."

She took the lead and walked into the street vendor, spending 6 yuan to buy a bottle of the most expensive cold drink at the time, Menglong, and handed it to Pei Zhi: "I'll treat you."

Pei Zhi looked at the cold drink for a while, then took money out of his pocket.

"You have to learn to accept other people's kindness." She said seriously.

Like you will tell me in the future.