6. Walls and Science

There is only one teacher in the school, called Zhang Jinglin, and all the classes in the school are taught by the husband alone.

Others think that Mr. is awesome and knows everything. But Ren Xiaosu has always had doubts, saying that there is a specialization in the art industry, and a person's energy is limited, so Mr. Zhang can't be omniscient, right?

Ren Xiaosu has always been different from others. When he looks at problems, he likes to reflect. Later, after listening to Mr. Zhang's lecture, he learned that this is called a dialectical way of looking at problems.

Yan Liuyuan is sometimes very puzzled, because Ren Xiaosu often refutes Mr. Zhang Jinglin's views, but he still comes to listen to Mr. Zhang's class when he is free...

In the afternoon class, Ren Xiaosu specially took Yan Liuyuan to celebrate, not for anything else, but for him to be able to listen to the class in the yard in the future.

Usually crouching on the wall is too far away from the classroom, after all, it is a little hard to hear. Originally, Zhang Jinglin liked to keep the doors and windows tightly closed when he was lecturing, because he was afraid that the movement outside would affect the students and cause everyone to be distracted.

But later he found out that Ren Xiaosu would leave a window after eavesdropping.

Now, let's just call Ren Xiaosu into the courtyard.

Many parents of children are living in this troubled world. They send their children to the school not to give their children more education, but to send them here to facilitate their children to get married in the future, especially girls who have gone to school can usually make a good family.

In this day and age, reading books, literacy, and three-digit arithmetic are pretty good.

Everyone is busy surviving, and they are running out of food, who cares if you have culture or not?

Therefore, most parents do not have a long-term plan to send their children to school. In this small market town, there are both poor and rich, and where there are people, there will be comparisons.

Yan Liuyuan watched Ren Xiaosu go to the grocery store to buy a cigarette with a filter tip. Old Wang also proudly said that his cigarettes had absolutely no extras, and they were very safe.

A 20, rare is the most expensive.

Yan Liuyuan asked suspiciously, "Brother, why are you buying cigarettes?"

"Your husband asked me to attend the class in the yard. I don't need to pay the tuition fee. I have to express it." Ren Xiaosu said with a smile, "I know this Mr. Zhang likes to smoke."

From Ren Xiaosu's point of view, when others express kindness, he must return it.

The two went to the backyard of the school while everyone was having lunch. Mr. Zhang was eating fried cabbage. Ren Xiaosu took the initiative and smiled and handed the cigarette to Mr. Zhang.

Zhang Jinglin didn't refuse, but told Yan Liuyuan to stay away: "You are growing up, and the smell of cigarettes is not good."

Ren Xiaosu thanked: "Thank you, sir, for letting me into the yard to listen to the lecture."

"Huh," Zhang Jinglin lit the cigarette with a match he used for cooking at home, and then exhaled happily: "There are not many students like you who like to listen to lectures now, just listen if you want, and you will stand in the future. The door, but not in the classroom."

"Okay," Ren Xiaosu responded, "Sir, I have a question."

"You said," Zhang Jinglin probably smoked a cigarette very rarely, and now he doesn't mind if Ren Xiaosu asks him anything.

"Sir, you said that before the cataclysm, human beings had a lot of technology, and we humans are not dead. Why don't those technologies reappear now?"

Zhang Jinglin glanced at Ren Xiaosu: "In the period after the catastrophe, human beings themselves have not accurately calculated how many years everyone has been struggling. It's good to survive every day. How can there be a scholar?"

"But we should still keep some materials, right? Wouldn't it be possible to quickly reproduce civilization after studying?" Ren Xiaosu was curious.

"The chronology is broken," Zhang Jinglin said with some pity: "I ask you, I will give you a set of materials for making an airplane. Can you make an airplane?"

"I haven't learned it yet. Although there are materials that can save a lot of time, I also learned from scratch," Ren Xiaosu said.

"Yes, now everyone is learning from scratch," Zhang Jingze looked at her half of the cigarettes left,

Feeling a little distressed, like hesitating whether to smoke or not.

He wanted to keep half of it and smoke it later, but would it be a little shameful to do so in front of Ren Xiaosu and Yan Liuyuan...

Ren Xiaosu was still puzzled: "Could it be that in those years, no one has overcome hardships and continued to learn?"

"No, they all starved to death," Zhang Jinglin said.

"Could it be that all that knowledge has been dated now?" Ren Xiaosu was not reconciled.

Zhang Jinglin looked at Ren Xiaosu seriously this time, and said meaningfully: "They are in the hands of a few people."

...

"Okay," Zhang Jinglin stood up and said, "don't ask about this, it's time for class."

Ren Xiaosu asked Zhang Jinglin the last question: "Sir, when was the wall of our refuge barrier built, and why are we building this wall?"

"After the cataclysm, wild beasts were rampant. It is said that there was a bug wave a long time ago, and humans had to build high walls to block the danger," Zhang Jinglin explained.

"But most of the beasts actually don't take the initiative to attack humans even if they have evolved," Ren Xiaosu was curious. Monkeys are still vegetarians, and sparrows still like to eat grains. They don't take the initiative to eat people.

Today, Refuge Barrier 113 is in the "circle" of human existence, and most of the more ferocious beasts are actually excluded from the "circle".

Refuge barriers with higher serial numbers are more dangerous. For example, the legendary Refuge Barrier No. 178 kills and injures many people every year because of expelling wild beasts.

And Refuge Barrier No. 113 is actually already regarded as the 'inland'.

There are still many dangers, such as wolves, but not insurmountable. That being the case, why does such a large human settlement still have high walls.

Zhang Jinglin said with a smile: "As long as there is danger in the wild, the refugees can only rely on the refuge barriers to live. At this time, the refuge barriers have a lot of cheap labor. You think the consortia behind the refuge barriers have no strength to completely eliminate those in the wild. Is it dangerous? Humans' hot weapons are more powerful than you think, but why do they want to eliminate them, and they can't threaten them."

When Ren Xiaosu heard this, he was already lost in thought. Although he was a precocious boy, there were some things he had never been exposed to before, so he was doomed to not understand. This was why he longed for knowledge.

Zhang Jinglin continued: "They won't tear down the wall. How could the vested interests in the wall give up this natural class barrier?"

With that said, Zhang Jinglin went to change his clothes, Ren Xiaosu asked curiously, "Sir, why are you changing your clothes, that one wasn't dirty just now."

Zhang Jinglin straightened his neckline and said, "It smelled of smoke just now, and the students didn't smell it well."

Yan Liuyuan was in awe, but Ren Xiaosu suddenly became a little unhappy: "Then I'll be fine when I hear it, sir, you didn't tell me to stay away just now."

Zhang Jinglin thought for a long time: "Go away."

At this time, Ren Xiaosu suddenly heard the palace in his mind speak again: "Mission: Desire for knowledge is never a bad thing, but what you have learned must be taught."

Ren Xiaosu was stunned for a moment, he just didn't understand what the task was for him to do.

...

In the afternoon class, the students all felt very fresh. There was Ren Xiaosu, who was several years older than them, standing outside the door, so that many students turned to look at him.

Zhang Jinglin knocked on the blackboard several times before he stopped the students' curiosity. He said, "This afternoon, we will have a survival class."

This is the uniqueness of the school in this era. It not only teaches arts and sciences, but also survival.

However, this class has been a headache for Zhang Jinglin, because he has never been in the wild to survive. He was born in a market town outside the 113 refuge barrier. Now his life has gone through more than 30 spring and autumn. When he was a child, he depended on his parents and grew up. Being a teacher is really not very good at survival in the wild.

So most of the time, it can only be scripted through previously preserved materials.

Zhang Jinglin looked at the students in the classroom: "Attentively listen to the lecture, don't feel that the danger is far away from you, now you have parents to protect you, when you are adults, you must learn to protect yourself. Today we will talk about if you encounter wolves in the wild. what to do."

The students in the audience actually liked to listen to the survival class the most. Other courses were too boring for their age, and the survival class sounded interesting.

At this time, the classroom was silent, Zhang Jinglin looked at Ren Xiaosu, who was standing by the door listening to the lecture: "Come on, tell me, what should I do if I encounter a pack of wolves in the wild?"

Ren Xiaosu thought for a while and said, "You should try to choose a hillside where there are trees all around, because it is better to choose a cemetery for Feng Shui."

Zhang Jinglin: "???"