In the logistics management department of the boot camp, Jiayu is waiting to get his personal belongings back.

The glasses man in the logistics went to the shelves and rummaged through them, only taking two clothes and his tattered backpack.

When I returned to the same place, I casually pulled a piece of paper on the spot, and began to write and draw, looking like I was very busy, without lifting my eyelids.

"I can't find your other things for the time being, it's the time of the war, do you understand? A few days ago, a group of Fire Lion Legions attacked the base, and we are in a mess here! ”

Nonsense, the man with the eyes couldn't make it up anymore, "Maybe I lost it in the chaos I don't know where, we're very busy now, I'll find your pile of broken things when I have time, try it next time, get out." ”

Jiayu looked around, and there were only the two of them in the logistics equipment department.

But Jiayu still had a simple face and nodded very understandingly.

"Oh, well, thank you."

Turned around and walked out of the battalion headquarters.

The man walked away, and the man with glasses relaxed the pistol he was holding under the table, and pursed his lips disdainfully, "Just like you dirt bun, and you still fight with us adults, I can play you to death." ”

The thing was lost, Jiayu was not very depressed, and he didn't care much about the loss of the watch.

Walking alone in silence through the sulfur-filled open-air camp, he silently returned to the oxygen-filled crypt.

Go underneath and pass through the filtration device.

Jiayu took a few breaths of air!

Only then did he realize that he had forgotten to take off the lock ring around his neck.

"Forget it, it's not a big deal, just be a post-modern necklace, with a lot of personality."

Jiayu asked for leave and left the camp, and several more people secretly obtained the leave qualification, followed Jiayu's footsteps, and entered the living area.

Before entering the boot camp, Jiayu had already gone through all the documents collected in the Academy of Sciences.

There is very little material on rocket launches, satellite manufacturing, etc.

In the past, most of the professional books in these fields in China were classified materials, and the universities in Qingcheng were basically based on agriculture and animal husbandry, and their libraries basically did not collect such high-tech materials.

As a result, there is a shortage of professional books.

Nina once talked about this, and she suddenly remembered that there was a black market in the northern base, and if you dig around here, you should be able to find some old collections, and you can also pick up some leaks or something.

The location of the black market is in the other direction of the Academy of Sciences, passing through the model residential area, a few kilometers diagonally downward, and you can find it.

This is the sewer of the base, and it is also the slum of the base, the chaotic area, and it is a place that the administrators do not want to go into.

There are countless caves here, and the directions are extremely chaotic, even Liu Moxi, who was desperately digging the caves at that time, couldn't remember how to go.

Jiayu can only go to find the mountain woman, no matter where he wants to go, it must be right to find the mountain woman.

…………

…………

Jiayu once again climbed to the top of the base hill with difficulty.

The good girl Jiajia went to the zoo to take classes, and in the cave on the top of the mountain, only the mountain maid was alone.

After copying a bunch of codes, the mountain woman straightened her waist and shook her neck.

"What's the matter?"

Jiayu heard an extremely rare hint of surprise from Shanwu's tone, and Jiayu smiled secretly in his heart, he must have thought too much.

He smiled carefully, "Girl, ......"

"Please call me Lieutenant Shanwu!"

Jiayu smiled when he said something, "Lieutenant, what's wrong?" ”

The mountain woman was unmoved, "What's the matter?" ”

Jia Yu said, "I'm in boot camp, you know, right? ”

Shan Wu bowed slightly, she knew the location of each evolutionary in the base.

Jiayu thought about it, "I just took a day off and wanted to go to the black market to get some things and ask you for directions." ”

The first time she spoke, she paused, "You are in danger now, and there are many people around you who have bad intentions towards you!" Go to the sewers and they'll do it! ”

Jiayu knew that Nina knew, but he didn't care at all.

"I'm fine, I'll be careful."

The mountain woman didn't say anything more and pointed the way in detail.

Before leaving, Jiayu smiled, "When there's nothing to do, I'll come to you for tea!" ”

Shan Wu nodded slightly.

…………

After passing through the modern-style model residential area from the Evolver team camp and passing the zoo to say hello to the two pandas, Jiayu went all the way down into the factory area in a dimly lit tunnel.

Covering an area of more than 100 acres of huge underground space, several factories are planned to produce various daily necessities and guns and ammunition and other necessary ordnance for the base.

If the factory area wants to expand further, it can only wait for Liu Moxi to return from the battlefield in the capital.

There are countless passages between the slums and the factory area, and the conditions of these tunnels are very rudimentary, there is no lighting, only a torch is planted at a long distance, and if a large group of people wants to pass through, the passage will be blown up in a short time.

Walking through such a passage, Jiayu's dangerous instinct in his mind kept telling him that there was a remote control - a bomb here, and there was a dangerous mechanism news there.

…………

Like a mouse, the fish meanders down deep tunnels and deep into the earth.

In the distance, the dim lights gradually turned on, and Jiayu stepped into a lawless space deep underground.

At the mouth of the tunnel stood two sturdy men, scrutinizing each one.

Jiayu brought a backpack, did not wear a military uniform, wore the usual black leather jacket and leather pants, a week of high-intensity training, so that his skinny figure finally has a little muscle, but there is still a sense of weakness blown by the wind, and it seems that there is not much threat.

The guards were a little puzzled by the lock ring around his neck, which seemed familiar.

The queue gradually increased, and the leader of the guards waved his hand and drove Jiayu into the black market.

From here, there are no super-large caves, countless small tunnels, and people live like rats.

The blower stolen from the clean and tidy living space above slightly satisfies the most basic living conditions of ordinary people in the underground space.

This is the apocalyptic life that belongs to ordinary people, a life of waiting for death in quiet darkness.

…………

The tunnel was twisted and crooked, and if there was no acquaintance to lead the way, he could walk in it for half a year without repeating it, but fortunately there was a map given to him by Nina.

The ground image is a child's stick figure, which is a bunch of lines.

It says that after entering, turn right in the first few caves from the left, and when you enter the eighteenth fork in the road, enter from the bottom intersection, and then walk through an underground river to enter the third cave on the left......

According to the guidance of the map, Jiayu counted the holes, one by two......

Due to the lack of lighting, the average person here has evolved a little bit of night vision.

In the dark, a faint green light would emerge from the human eye, and Jiayu would occasionally hear a short cry for help from the corner of a cave not far away, and then there would be no sound.

Sewage flowed across the ground, and the air was filled with a choking stench.

Caves with better conditions will be equipped with separate air purification equipment.

The real poor can only breathe choking air and try to survive.

They don't dare to go up, and they will be used as cannon fodder to feed countless terrifying monsters.

In the chaotic era of the base, it was a paradise for criminals and rebels, and later the base gradually formed a set of institutional norms, the evolutionaries in the sewers were captured one by one, the middle-aged and elderly people in the upper class were driven down, and some young people who were unwilling to work and unwilling to be restrained also fled into the sewers.

They all hid a lot of bits and bits and pieces that they were reluctant to throw away, and a trading market like a scrap yard gradually formed deep underground.

The people here are called "dirty sewer rats" by the upper class residents.

…………

In the beginning, there were often evolutionaries who came here to search for useful things, pick up leaks, and find some treasures or something.

But as time passed, it was a long time since a new evolutionary appeared.

What's even more strange is that in the sewers, as long as someone in a cave is found to show signs of evolution, the people in the underground black market will immediately send him to the upper level, so that everyone will not be affected.

Underground can only be bartered, food is the most popular hard currency, and the money accumulated by Jiayu is of little use.

For the upper class, money is life.

When Jiayu enlisted for the physical examination, a certain high-tech nano device was inserted, which was a kind of "wallet"

23 hours, this number is money, money to breathe and to survive.

…………

The trading area is in a rather large two-story cave.

The relatively open cave in the middle is the general trading area, and there are dense small holes around the hall, which is equivalent to a VIP store.

Jiayu walked around twice, but he didn't see a book, and he didn't even look at the VIP store, and he couldn't see any trace of paper.

While rummaging through the stalls, he suddenly found something very familiar.

It is a small coin, made of stone, with countless intricate patterns carved on it, and a human face in the middle.

When Jiayu saw this coin, he thought of a game - "Zuma"

Whoever sees this stone coin will feel that it should be a tourist souvenir bought by a citizen of Qingcheng when he traveled to South America, and the stone coin is very rough carved, not like the original antiquities of the Mayans.

But on this stone coin, Jiayu felt the breath of the primitive era.

Many of the older objects in Neanderthal collections have this flavor to a greater or lesser extent.

This thing is not expensive, and the stall owner does not have a lion's mouth, so Jiayu exchanges half a potato.

Jiayu played with the stone coin in his hand, and looked closely, even if the X-ray vision was turned on, the coin did not change at all, and no ray could penetrate it!

…………

He was instructed to find books where fuel was sold, and could only be found in an inconspicuous corner in the deepest part of the trading area.

In addition to colored novels, other tool books, in dark underground caves, can only be fuel.

Passing through the bustling crowd, Jiayu walked farther and farther until he entered a small passage of darkness and silence.

At the end of the passage was a very old man, carefully tapping a book, and then carefully setting it aside.

He has sparse white hair, his face is covered with dust, he can't see his original skin color clearly, and his eyes are almost blind, and he relies on hearing to communicate with people.

Sensing Jiayu's footsteps, the old man asked, "What do you need to burn?" Coal, gasoline, and firewood brought down from the top are all sought-after goods. ”

The corners were so dark that you couldn't see your fingers.

The old man's life was not affected, and Jiayu settled down and asked, "I want to buy a few books." ”

The old man wondered, "The book can't stand burning, it will burn out in a while, do you want to look at something else?" The weight of a book is about the same as a few pieces of coal, and coal is resistant to burning. ”

Jiayu explained, "I didn't buy books to burn, I just wanted to find some information!" ”

The old man immediately stood in awe, "Okay, good, pick whatever you want, pick whatever you want, give you a twenty percent discount!" ”

In order to let Jiayu read the words in the book clearly, the old man lit the kerosene lamp that he was usually reluctant to burn, and in the dark space, a little light seemed to be able to illuminate the direction of the continuation of human civilization.

The old man has a lot of books, and in the mountain of books as tall as a hill, Jiayu is very fortunate to find six books on aerospace, including "Dynamics and Control of Launch Vehicles", "Analysis Methods and Test Techniques for the Mechanical Environment of Satellites and Launch Vehicles", "Research on the Standard Product Classification System of High-resolution Optical Satellites", and "Design and Test of Space Cameras".

I also found a book on materials science such as Chen-style Taijiquan boxing and metal processing methods.

With these books in hand, Jiayu returned to the old man's side.

The old man took out a pair of eyes from the box in his hand, squinted, and tried to distinguish the words in the book, reading them word by word.

After reading the books selected by Jiayu, the old man didn't speak for a long time, as if he was thinking about something, "Young man, why are you looking for these books?" ”

Jiayu didn't hide it from the old man, "I have to launch a few satellites, but I know too little about this aspect, so I can only figure it out by myself!" ”

In the dark, the old man suddenly became energetic, "Launch a satellite? Hundreds or thousands of people have to study things that can only be done in a few years, with the help of hundreds of factories and tens of thousands of people...... How many people are in your team? ”

Jiayu smiled embarrassedly, "At present, I am the only one, but there may be a little more in the future, how can there be more than a dozen, and it will be enough to pull a few more techno-evolutionary people into our team when we go back." ”

The old man was stunned, what? A dozen people? You're kidding?