There is only one gentleman in the school, named Zhang Jinglin, and the teaching in the school is taught by Mr. alone.

Everyone else thinks that Mr. is powerful and understands everything. But Ren Xiaosu has always had doubts, and they all said 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, he likes to reflect when he looks at problems, and later listened to Mr. Zhang's lectures to know that this is called a dialectical view of 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 lectures when he is free......

During the afternoon class, Ren Xiaosu specially took Yan Liuyuan to celebrate, if not for anything else, but for him to listen to the class in the courtyard in the future.

On weekdays, squatting on the wall is too far away from the classroom, and after all, it is a little difficult to hear. Originally, Zhang Jinglin liked to close the doors and windows tightly when 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 after Ren Xiaosu eavesdropped, he would leave a window.

Now, just call Ren Xiaosu to the courtyard.

Many parents of children are in this troubled world, and they send their children to the school not to give their children a long education, but to send them here to facilitate their children's marriage in the future, especially girls who have gone to school can usually promise a good family.

In this era, it is already very good to read and write, and to know three-digit arithmetic.

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, and there are poor and rich people in this small market town, and there will be comparisons where there are people.

Yan Liuyuan watched Ren Xiaosu go to the grocery store to buy a cigarette with a filter, and Lao Wang also proudly said that his cigarette was definitely not added with any big ingredients, and it was very safe.

A 20, scarce is expensive.

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

"Your husband asked me to go into the courtyard to listen to the class, and if I don't pay the tuition, I have to say it," Ren Xiaosu said with a smile: "I know that this Mr. Zhang likes to smoke." ”

In Ren Xiaosu's view, if others express kindness, they have to reciprocate.

The two of them went to the backyard of the school while everyone was having lunch, Mr. Zhang was eating fried cabbage, and Ren Xiaosu took the initiative to hand the cigarette to Mr. Zhang with a smile.

Zhang Jinglin didn't refuse, but asked Yan Liuyuan to stay away: "You are growing up, and it doesn't smell good to smoke." ”

Ren Xiaosu thanked: "Thank you, sir, for letting me go into the courtyard to listen." ”

"Whew," Zhang Jinglin lit the cigarette with a match from his own cooking fire, and then spit out a puff of smoke: "Now there are not many students like you who love to listen, just listen if you want to, you will stand at the door in the future, but you are not allowed to enter the classroom." ”

"Okay," Ren Xiaosu said kindly, "Sir, I have a question." ”

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

"Sir, you said that there were a lot of technologies in human beings before the cataclysm, and we humans have not died out, so why don't we see those technologies reappearing now?"

Zhang Jinglin glanced at Ren Xiaosu: "During the period after the catastrophe, human beings themselves have not accurately calculated how many years everyone has survived, it would be good to survive every day, how can there be a person who is a scholar?"

"But we should still have some information, right? Isn't it possible to quickly recreate civilization by studying it?" Ren Xiaosu was curious.

"It's broken," Zhang Jinglin said with some pity: "Let me ask you, I'll give you a set of materials for making an airplane now, can you build an airplane?"

"I haven't studied before, and although having materials can save a lot of time, I also started from scratch," Ren Xiaosu said.

"Yes, now everyone is learning from scratch," Zhang Elf looked at the cigarette he only had half of his cigarette left, and felt a little distressed, as if he was hesitating whether to smoke or not.

He wanted to keep half of it before smoking it, but wouldn't it be a bit faceless to do so in front of Ren Xiaosu and Yan Liuyuan......

Ren Xiaosu was still puzzled: "Could it be that in those years, there was really no one to overcome hardships and continue to study?"

"No, they're all starving," Mr. Zhang said.

"Could it be that all that knowledge has been cut off now?" Ren Xiaosu was unwilling.

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 pestered Zhang Jinglin and asked Zhang Jinglin one last question: "Sir, when was the wall of our refuge barrier built, and why did you build this wall?" ”

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

"But most beasts don't actually take the initiative to attack humans even if they evolve," Ren Xiaosu was curious, monkeys are still vegetarians, and sparrows still love to eat grains, they don't take the initiative to eat people.

Refuge Barrier 113 is now within the 'circle' of human existence, and most of the more ferocious beasts are actually excluded from the 'circle'.

The higher the serial number, the more dangerous the refuge barrier, such as the legendary Refuge Barrier 178, which kills and injures many people every year because of the expulsion of wild beasts.

And the No. 113 refuge barrier is actually considered 'inland'.

There are still many dangers, such as wolves, but they are not insurmountable. In this 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 wilderness, then the displaced people can only rely on the refuge barrier to live, and at this time, the refuge barrier has a large number of cheap labor. Do you think that the conglomerates behind the refuge barrier do not have the strength to completely eliminate the dangers in the wilderness? The thermal weapons of human beings are more powerful than you think, but why should they eliminate them, and they cannot threaten them? ”

Ren Xiaosu was already deep in thought when he heard this, although he was precocious as a young man, there were some things he had not been exposed to, so he was destined not to understand, which was also the reason why he was eager for knowledge.

Zhang Jinglin continued: "They will not tear down the wall, how can the vested interests in the wall give up this natural class barrier?"

Saying that, Zhang Jinglin went to change his clothes, and Ren Xiaosu said curiously: "Sir, why are you changing your clothes, the body just now is not dirty." ”

Zhang Jinglin straightened his neckline and said, "That body was stained with smoke just now, and the students smelled bad." ”

Yan Liuyuan was in awe, and Ren Xiaosu was suddenly a little unhappy: "Then I'll be fine when I smell it, sir, you didn't let me stay away just now." ”

Zhang Jinglin thought for a long time: "Get out." ”

At this time, Ren Xiaosu suddenly heard the palace in his mind speak again: "Task: The thirst for knowledge is never a bad thing, but what you learn must teach people." ”

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

......

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

Zhang Jinglin tapped the blackboard several times to stop the students' curiosity, and he said, "This afternoon is a survival class. ”

This is the unique feature of this era, the school, which not only teaches liberal arts and sciences, but also survives.

However, this class has always given Zhang Jinglin a headache, because he has not survived much in the wild, he was born in the market town outside the 113 refuge barriers, and now his life has gone through more than 30 spring and autumn, he relied on his parents when he was a child, and he grew up to become a teacher, and he is really not very good at survival in the wild.

So most of the time, you can only read from the script through the materials that have been preserved in the past.

Zhang Jinglin looked at the students in the classroom: "Listen attentively, don't feel that the danger is far away from you, now that you have parents to protect you, when you are an adult, you must learn to protect yourself." Today we're going to talk about what to do if you encounter wolves in the wild. ”

In fact, the students in the audience like to listen to survival class the most, and other courses are still too boring for their age, and survival class sounds interesting.

At this time, there was silence in the classroom, and Zhang Jinglin looked at Ren Xiaosu, who was standing against the door and listening: "Come, tell me, what should I do if I encounter wolves in the wild?"

Ren Xiaosu thought for a while and said: "You should try to choose a hillside with trees on all sides, because it is better to choose the feng shui of the cemetery in this way." ”

Zhang Jinglin: "???"