As soon as Shu Han heard about the injection, the strangeness in his heart once again flooded, what kind of world is this, the slaves live like the Paleolithic Age, but when they hear about this medical condition, it seems to be in modern times, it is simply incredible, and there is still salt water, Shu Han's heart is full of ninety-nine.

I saw Zhao Qingtian walk to his desk, open the cabinet on the left-hand side, take out a tool box, open the box and take out a needle and a catheter from it, and then go to the glass cabinet behind him and take out an infusion bag.

Zhao Qingtian took a needle and burned it in the oil lamp a few times, then picked up a piece of alcohol cotton and wiped it, and then walked towards Shu Han.

"Doctor, you've used this infusion needle, right?" Shu Han looked at the needle, which was a little bent, and couldn't help but say nervously.

"So what's not? Don't worry, it's been detoxified, it's fine. Zhao Qingtian looked as he should be.

Shu Han didn't dare to let him prick it at all, how could this needle be used repeatedly, it was all disposable, looking at the degree of bending, I don't know how many people's skin had been pierced, who could guarantee that there was no blood-related emergency in it? He only opened his skin and flesh, and did not hurt the inside, and the possibility of infection was very low, he would rather believe in his own resistance than believe in this needle that has pierced I don't know how many people.

"I don't want it, doctor, you can apply medicine to my back, I'm in good health, I can get better."

"Hey, you little slave, even the overseers aren't as particular as you." Zhao Qingtian was very surprised, these days, the awareness of protective measures is not strong, not to mention slaves, it is an ordinary free man, and it is also a casual piercing, there is no way to prevent infection, Zhao Qingtian also learned this knowledge when he was in school, but when he really treats people, he is not in a position to do so.

"Doctor, don't you have new needles?" Shu Han looked at the needles that were put away by Zhao Qingtian, although they were a little crooked, but he could still see that these needles were very fine, and the hole in the middle was almost the same as in modern times, with such needles, it undoubtedly showed that the industrialization ability of this era should be good, but whether it was Shu Han's memory, or the slave life he had just started for only two days, it reflected that this was a society without any industrialization at all.

He was really puzzled.

Zhao Qingtian looked at the little slave in front of him with a ridiculous face, and said with a little pride while putting the things back into the cabinet: "Little slave, do you know how much this needle is in the market, you look down on this needle, but this needle, I promise you, I can buy ten of you." “

"So expensive?" Zhao Qingtian's words surprised Shu Han very much, could this needle be made of silver?

Zhao Qingtian didn't know what was wrong, he didn't like to talk to others on weekdays, but today he had a good conversation with this little slave, perhaps because the tone and quality of Shu Han's speech were not like those vulgar overseers, let alone ignorant slaves, for him, he was a good conversation partner.

"So expensive? Is it priceless, little slave, don't look at him small as this needle, but like those cannons and muskets, they were all excavated from ancient ruins, should you be the needle holes that women use to do needlework? Zhao Qingtian said very conspicuously with the needle in his hand.

Shu Han was puzzled, why didn't this needle come down from the production line, but from what ruins?

"What ruins?" Shu Han asked, Zhao Qingtian had an expression on his face that you didn't even know this, and said in his mouth: "Now the education in the nursing home is no longer even taught?" He sighed again and again, and Lin Bida on the side said: "The so-called ruins are the treasures left by the human beings of the previous era, and the electricity, guns, wires, and needles we use today are all obtained from the ruins. “

"That's right." Zhao Qingtian said with certainty, looking at Lin Bida's eyes even more strange, this kid has a lot of knowledge and has such a strong physical fitness, how could he come to be a slave?

"What does the last era mean?" Shu Han didn't think about it so much, he vaguely felt that there was a lot of information in Lin Pida's answer, or behind that information, there was a reason why this world was so similar to the era he lived in, but it was very different.

This time, not only Zhao Qingtian's eyes were full of surprise, but even Tiema and Yao Zhi looked at Shu Han with a frightened expression, Yao Zhi said: "Shu Han, you won't even have a bad brain." ”

"My mind is a little muddy, I have forgotten a lot of things I learned in the city, you guys hurry up and talk about it, what is the last era, and what does it have to do with our era, hurry up!" Shu Han casually pulled an excuse to explain, he was quite excited at the moment, and his voice was a little hoarse.

Lin Pida looked at him deeply, and said, "The era we live in now is called the age of sin, and the previous era, the era in which the owners of these relics and creations lived, is called the age of madrigals. “

Lin Bida's words made the eyes of the other two slaves present and Dr. Zhao Qingtian couldn't help but show a trace of yearning, Zhao Qingtian took over the conversation and said: "In the story passed down by the old people, it was an era when human beings were the primates of all things, in that era, people built towers that reached the sky, worked and lived there, and the land was full of majestic bridges and convenient avenues laid by us, and it was said that there were fast trains that exceeded the speed of the wind, and there were huge black ships crisscrossing the ocean. The cannons we make can radiate the entire world, and we can even build machines that fly in the sky and something called the subway that rushes underground. “

"It was the most beautiful era for mankind, so it was called the Age of Pastoral Songs by the old people."

Shu Han was shocked at the moment, this pastoral era, isn't it the era he lives in, he has some thoughts in his heart, at this time, the pressure caused by the death of the two informants was shocked and forgotten by these facts, he hurriedly asked: "Then how did it become like this?" “

This time, Zhao Qingtian did not show the eyes of the scumbag, but shook his head and said: "No one knows why, two hundred years ago, the heavens and the earth suddenly changed drastically, and since then, the environment has completely changed, a large number of creatures have become extinct, and only one percent of our ancestors survived in this drastic change, while other creatures living in this land have grown wildly, evolved, and become the overlord of this side of the world." “

The story in Zhao Qingtian's mouth completely confused Shu Han, when the doctor gave him medicine, he didn't even feel pain, and when he regained consciousness, his back had been wrapped in layers of medical and health cotton cloth, and his brain continued to transmit to him a memory that once belonged to Shu Han, and a complete world view began to form in his brain.

Two hundred years ago, a drastic earth change triggered a mass extinction, as the overlord of the earth, human beings, under this natural disaster, almost all died, leaving only 10% of the population, that is, less than a billion people, survived, at that time, the volcanoes of Siberia have been erupting, the underground ocean current swept the waves up to hundreds of meters high and crashed on the shore.

In the period of about 50 years, more than 90 percent of the population died, and less than 100 million people survived, and they were divided into different places.

And after all the natural disasters subsided, people at that time were ready to contact their compatriots scattered all over the world in order to rebuild civilization, and at this time the earth has long been unrecognizable, and the drastic changes in the climate have not only changed human beings, but also changed all the creatures of this planet, they have become stronger and more powerful than before, and the human beings who have encountered a huge crisis and a reduced population are really no opponents, and in the end they can only shrink into castles in order to survive.

In the end, human beings have degraded from the global village where there is no communication and the end of the world is close to each other to the era of chickens and dogs smelling each other, old and dead do not get along, and this further makes human science and technology begin to degenerate, and the inheritance of science and technology needs to be carried out by people, and human beings are divided into small castles, and there is no way to exchange knowledge.

These are the records of that period of history in the textbook of Black Iron City, which really shocked Shu Han.

After understanding all this history, Shu Han only felt that it was very absurd, the era in which he lived, people were imagining how beautiful the future would be, whether it was the heroism of rushing out of the universe and colonizing the stars, the era of infinite energy brought about by nuclear fusion, or the all-virtual new world brought by the VR system, but he didn't expect that two hundred years later, people in this era would miss the era they lived in.

Shu Han only felt that he wanted to cry, but he couldn't cry, he lay on the hospital bed in a daze, and the people around him didn't bother him, he just thought that the back injury made him hurt badly, Tie Ma and Yao Zhi took the lead in returning to the mine to prepare after confirming that the two were safe.

Although the overseer asked them to come out to see a doctor, the progress of the work could not be left behind, if they didn't finish it today, they would have to continue to do it tomorrow, and they had nothing to do, so they naturally had to go back quickly, and there were only two patients left in the hospital, Zhao Qingtian, a young doctor, Shu Han and Lin Bida.

"Hey, it's not early, are you two eating?" Zhao Qingtian asked, looking at the clock hanging on the wall, the time was already around five o'clock in the afternoon, and after a while, it would be dark, Zhao Qingtian was about to go out to eat, looked at the two children, and asked casually.

"We don't have any money." Lin Bida said very simply, after surviving from the overseer's whip, he became a little jumpy, Shu Han did not speak, he was still immersed in his own thoughts, he traveled to the future, and the original civilization was destroyed like this, Shu Han had too many questions in his heart to find answers.

When it was destroyed, what centuries was it, how many years? To what extent did human science and technology evolve at that time, we were in space, so many satellites, aerospace equipment, how is it now, can it still operate, and is there anyone on it? If so, will there be some data stored in their computers?

What happened to your parents? Will they die in peace, or will they die in this mass extinction, or will they survive, Shu Han's eyes are full of tears, he really can't help but miss his parents and his younger brother and sister, what happened to them at that time?

"Alas, why are you crying, I didn't mean to ask you for money, I'll ask for this meal, don't cry." Zhao Qingtian saw Shu Han in tears, and thought that the other party was wronged because of his words, he was a young doctor, and he had not been beaten by reality, and he still had a little bit of idealism, plus he was alone, he belonged to the category where one person was well fed and the whole family was not worried, so he didn't mind so much about money.