In addition to the iron fences in conventional prisons, all places where workers are detained on the second floor have been equipped with toughened glass shielded doors. There are valves on the doors to adjust the air pressure, which should be set up for the special environment under the ground.

"It's kind?" I said in my heart. I thought again that I was afraid that these workers would die prematurely under pressure. Where is kindness? I obviously wanted these people to work until they died.

Referring to the sketch in hand, we quickly found the cell on the metal foil paper, determined the orientation according to the direction of the door, and found the place where the fork was drawn. It is a brick wall. Beside the wall is a double-layer bed for workers. The bedding on it has grown cyan mold and looks disgusting. I dragged the bed aside. Jin Lihua and Sanmei knocked the wall with a military knife. Soon they found a broken brick. After opening it, there was a hole in it.

"Fuck, which one is this? Treasure hunt?" I shouted in the back.

Sanmei took a light with her head lamp, reached in and took out a small canvas bag. There were two pieces of paper in it, one with patterns, the other full of German, a key filed with rusty iron and a ring.

Sanmei picked up the paper with words on it and translated it into German: "anyone who sees this letter, please take this ring to my family in Berlin, and I thank you in heaven." Sanmei stuffed the ring and key into her pocket and took the paper with patterns. We looked over and saw that the owner of the paper was planning to escape, with some arrows, routes and vehicles painted on the paper, At the point of the last arrow, a question mark was drawn, and a sentence was written "cave entrance, a large number of Soviet casualties, the situation is unknown."

"We're already under the ground. Why are there caves?" Ivan asked me.

I pointed at the Nightingale and said, "there are experts who don't ask you. Why do you ask me when I have 100000?"

The Nightingale explained: "The composition of underground strata is a very complex subject. Generally speaking, the uppermost layer is sedimentary rocks, and the lower layer is granite and basalt. Even if the generated rocks undergo metamorphism under a certain temperature and pressure, they will remelt and regenerate in the depth of the earth's core, become new magma, and come to the ground with volcanoes or earthquakes to form new rocks. It continues to undergo weathering, erosion, transportation and accumulation by external forces. In this way, the material in the lithosphere is in continuous circulation and transformation. This process, like the rotation of the earth, is going on every day, completing the slow turnover from the surface to the core of the earth, and has been going on for billions of years.

Therefore, it is normal to have underground caves. A rock circle of about 100 kilometers will form a lot of space during groundwater or plate movement, and many spaces have a history longer than human beings. In the United States, there are examples of living organisms in underground space after earthquakes. "

I shook my head and thought that if this woman didn't open her mouth, I would be dizzy immediately. These highly educated people were terrible. It seemed that they couldn't speak without terms. So I asked, "well, do you know what happened to a large number of deaths and injuries in the Soviet army?"

The Nightingale shook her head and said, "the underground situation is very complex. Human beings don't necessarily know more about the underground than space. Although we humans have successfully landed on the moon, there are many places in the earth's interior that took billions of years to form, so no one knows what may happen."

"Don't worry about it first, try along this picture." Ivan, who was acute, shouted. It seems that I'm not the only one who can't stand Nightingale terminology.

So we retreated in the direction of the arrow, blocked the enemy in sections all the way, and set up a lot of booby traps with doors and furniture. Because those stone core zombies can't climb up now, the enemy can only chase us with infantry, although there are more people than us. But as long as the living are afraid of bullets, they will choose to hide and dodge before shooting, and they won't explode, so we have little pressure A lot.

Soon we followed the route map to the end of the first arrow,

But there was nothing at all when I looked left and right, because there was simply a row of open squatting toilets. A lot of dark brown stool was still dry on it. It looked like the Russian chocolate I had eaten at Ivan's house before, which made me a little sick.

What does that mean? A navigation map for people in need? Ivan asked, pointing to the foil in my hand.

"Do you know there is a wise saying about toilets in China?" I asked Ivan as I took out two offensive grenades.

"I don't know. You have a history of more than 5000 years in China. There are so many wise sayings. Your naughty intestines are several meters long. I don't know what you mean." Ivan spread out his hands and shook his head.

"OK, today I'll teach you a word. Listen carefully and ask the people to throw bombs in the toilet - arouse public anger." after that, I raised my hand and threw out the grenade that pulled off the insurance.

"Fuck, Crazy Monkey" Ivan yelled and quickly picked up his cousin and hid in a safe place by the wall.

After the blast, we went into the dusty bathroom and found that several squatting toilets had been blown up, exposing the septic tank below.

After taking a look at the low sewer below and the "inventory" half a foot deep, Ivan immediately said, "forget it, I'd rather be killed."

San Mei glanced at him and said, "you have backbone. If you don't drill into such a place, you can die like a hero. Where's your cousin?"

Jinlihua turned her eyes and said, "sister Sanmei, don't pay attention to him. If you want to die, just stay. Irina, we can take it away." after that, the first jumped down, bent down and began to climb up along the sewer.

I thought these two women could sing, one black face and the other white face. If I didn't say a few words, wouldn't I have no team spirit. So I pointed to the golden pear flower that I couldn't see in half of my body and said to Ivan, "usually you look like a man? Aren't you worse than a woman?"

Ivan was fooled and scolded, "fuck, count a fart." he turned to Irina and said in a very gentle tone, "follow me, you know?"

Irina nodded. The brother and sister went in one by one. The Nightingale hesitated, took a deep breath, then closed her eyes and went in, followed Irina and began to climb behind her.

Sanmei and I ran back to replace the blood dragon, Andre and Ares who were shooting at the enemy behind. Several booby traps were set up at the back, and the stinking sewer was drilled at the end.

The human brain is a wonderful thing. It will automatically classify and store good or bad memories. When you touch a node in this storage network, the corresponding information will be extracted automatically.

For example, when you smell the smell of grass, you will probably recall a picnic in your childhood. On the green grass in spring, you bask in the warm sun, enjoy a dreamy nap, wake up by the smell of baked food from your family, open your eyes and put a lot of delicious food in front of you.

Or if you smell some flowers at home, you will recall that many years ago, you held with your young wife at that time. You smell her hair and say in her ear that you will love her forever. Then she didn't speak, just held you tighter.

Of course, these are more romantic aspects. Personally, they are more plain memories. For example, when I grow up and go upstairs and downstairs, I don't know whose house floats out the smell of garlic in fried vegetables. I will recall the Spring Festival when I was a child, holding chopsticks to mix garlic and vinegar in the small dish in front of me, swallowing saliva and waiting for the first plate of dumplings to come to the table.

However, all these are good memories triggered by fragrance. The human brain will automatically associate bad smell with sad memory, because the smell will stimulate the olfactory nerve and trigeminal nerve, resulting in a direct correlation reaction, which is not even controlled by the brain. For example, when some people smell urine, they will recall that they were scolded by their parents when they wet the bed as a child. Some people smell burning and recall that they almost burned to death.

At this moment, crawling in the sewer full of feces, my mind will either recall that I was punished to sweep the pig pen on the army farm for fighting, or that my dog was run over by a car when I was a child. I cried bitterly with the body in my arms, or even the eyes of the guy whose throat was cut off looked at me before he died, And the blood from his wound poured into my mouth, which made my nose full of blood.

In a word, none of them is a good memory, either beating or being beaten, or killing or almost being killed. In particular, people like me have experienced a lot of tragic, strange and bloody things. For a moment, they all recalled and rushed to my heart, like dozens of steel files constantly torturing my nerves. If I keep climbing like this, I must be crazy.

In this way, in the torture of different terrible memories, we were like nine rats covered with shit and urine. We didn't know how many turns we turned and how long we climbed in the dark sewer, but we finally got to the place marked on the map to go out from the pipe. The enemies behind didn't catch up. Maybe they were frightened by our disgusting escape method, or they were prepared to block us at both ends because they were too likely to be ambushed when entering the complex pipeline system.

The front Jinlihua smashed a hole in the T-shaped joint of the pipe with a military knife and butt of a gun. Ivan climbed over again to help make the hole wide enough to climb out.

After climbing out, no one cared that the air pressure would squeeze blood on their heads. They all took off their hoods and threw up on the ground. The man who spits and scolds and draws the escape route map is too pit father. If the sewer is longer, he will be directly smoked to death.

After wearing the hood, we found a downward vertical pass along the arrow in the figure. The vertical ladder also leads to the third floor, but the arrow indicates the direction down to the first floor. After arriving at the first floor, she came to the door in the direction of the arrow. Jinlihua habitually touched the iron wire to unlock the lock. She was stopped by Sanmei. She only heard Sanmei say, "this man plans to escape. He should also consider this door and try this key."

Jin Lihua shrugged and said, "OK, save trouble."

After opening the door with the key found with the map, we entered a large parking lot full of T62 tanks and multi-purpose tracked armored vehicles. It seems that the function of the hidden vertical ladder is to enable people on the third floor to quickly gather at the place with armored vehicles in case of an emergency.

We were stunned when we opened the door. It was obvious that the enemy was using these tanks and armored vehicles. Nikolay, the third person in the club, is taking a group of people to refuel the tank and load shells. It seems that the other party is really angry and is ready to blow us to death with tank guns and heavy machine guns at the risk of damaging the main base building.