I couldn't help but gasp.

Tang Yiyi said that it is better for us to go around this place, we will definitely find something. I nodded, took my flashlight, and walked around the crater with trepidation.

This crater is really huge, at least a dozen meters in diameter. No matter which direction you look at, you will see that under the big crater are dense white forest bones.

After turning around, I found two thick pipes on the edge of one of the large pits. I thought to myself, could the two pipes be underground passages, hiding young men diving?

So I immediately decided to go down and have a look. I found two thick cables, tied them around my waist, and climbed down the wall little by little.

When I finally climbed to the edge of the cave and looked inside, I realized that the hole was unfathomably deep and the flashlight could not reach the end. The hole is just right for a person to get into on his knees. I went inside and looked at it, and was quickly drawn to the two words on the pipe.

"Biogas Pipeline-1"

Biogas pipelines? I shuddered. This big pit turned out to be a biogas digester? Grass, they actually use human corpses as raw materials for biogas digesters?

I crawled out trembling, not daring to stay here any longer. I can't imagine anyone who is so perverted as to do such a thing that is contrary to the spirit of humanitarianism.

I wasn't prepared to tell Tang Yiyi about this, so as not to cause her fear. However, Tang Yiyi's curiosity was overflowing, and no one could stop her, and she kept asking me what I had discovered.

Helpless, I had no choice but to tell Tang Yiyi what I found. When Tang Yiyi heard this, her face suddenly turned pale.

His voice trembled and said: "What else can a person who can do such an act except for the Japanese army invading China?" ”

Yes, Tang Yiyi reminded me in one sentence. Could it be that this place turned out to be a secret underground base of the Japanese army invading China? And these white bones are all compatriots who died when they were used to build this underground base?

I'm afraid that only the Japanese army that invaded China could do such a thing.

Even if he died, he still couldn't live in peace, and was used as a raw material for a biogas digester by the Japanese army.

I'm furious, and I'm sure I'll make this place public when I go out.

But then I was surprised. Why did the Japanese army spend so much effort to build such a huge base underground? It doesn't look like there's a lot of people stationed here, it's definitely not a bomb shelter or something.

Because there is no need to build such a deep bomb shelter, and the scale is not so large.

It's pretty old, at least seventy or eighty years old. But what about those fresh corpses? Could it be that he accidentally touched this place, and died in the digester for unknown reasons? Could it be that when they come down, the biogas from the digester is not completely cleaned?

Probably so. I sighed, I wasn't ready to continue to care, I was ready to continue walking forward with Tang Yiyi.

We refound the iconic stone pile and followed it all the way.

Along the way, I pondered the purpose of this digester. Needless to say, it's definitely for the sake of getting energy. If only the power generation system is used to support the power supply of such a large-scale underground world, how much power generator will be needed, and the energy will not be enough.

So they must use the digester to meet some of their needs, such as heating, cooking, lighting and so on.

Continuing along the wide passage, we had not gone far before we found two railroad tracks.

The rails were clearly out of shape with the train's tracks, narrow, and some parts had protruded from beneath the surface, making them useless.

My guess is that these rails are probably the tracks of tunnel cars that are walking and transporting goods, or maybe they used these things to transport the corpses of their compatriots? Or some other biogas digester raw material.

Continuing on, we found several tunnel cars. The tunnel cars have long been unusable and have been discarded haphazardly.

When I got here, the tunnel turned a corner, and I hesitated, a little undecided, whether to continue in a straight line, or continue to walk with the tunnel that turned.

After thinking about it, I decided to go down the tunnel first. After walking down the tunnel for about ten minutes, a large building appeared in front of us, which looked like a factory from the outside.

Could it be a military factory used by the Japanese army to research weapons?

The doors of the military factory were rusty and mottled, and the entire factory was covered with dust. It looks like no one has been here for a long time.

I walked up and slammed the door hard. The thick iron door suddenly made a dull thudding sound, and in the enclosed underground space, the sound was even more deafening.

I hurriedly stopped, if there were our enemies in this underground space, they would definitely alarm them.

The door was locked with a large brass lock. I went up and pulled it twice, and the copper lock was so strong that it was impossible for me to pull it open.

Then, my eyes unconsciously fell on the copper lock, and I found that there were a few small words on the copper lock. It was crooked, it looked like it had been carved with a dagger or something, and it looked very new, and you could see some copper lock slag.

I immediately leaned in to take a closer look, and saw that the brass lock had the words "Climb in from above".

Crawling in from above? Is it the desertion that reminds us that he is in it? Damn, it must be like that.

I was taken aback, and hurriedly shouted inside: "Desertion, Brother Gao Leng, are you inside?" ”

To my delight, we did get a response. The big iron door was slammed from the inside, and it must have been Brother Gao Leng and Kaixiao's response to us.

How did the two of them get here? I immediately asked Tang Yiyi to wait for me at the gate, and I climbed up to the factory along the wall.

The factory building is rotten and can't settle down at all. I had to step on the wall and go deeper and deeper. Finding a suitable corner, I used a flashlight to shine in the direction of the big iron gate, wanting to see if it was Brother Gao Leng and Kai Xiaoxiao who patted the door.

However, the inside of the large iron gate was also locked, and there was no one empty, and upon closer inspection, no human traces were found.

I shouted again: "Brother Gao Leng, desertion, are you guys inside?" ”

There was still no response.

I'm cǎo, what's the joke? I'm sure there's someone here, because the sound of the slam on the iron door is so real. But for Mao, then the people are gone?

Brother Gao Leng and Kaixiao don't need to avoid me.

I realized that there was probably a danger here, so I didn't dare to go down and find out for a while. I had to find a hidden place and observe carefully.

However, I observed it for more than ten minutes, and there was no movement in it. I'm a little impatient to wait, because I don't have much time to spend here. If we can't find the exit within two days, Tang Yiyi and I will have to starve to death here.

So I decided to take the risk and go inside the factory to see what was going on inside the factory.

I silently crawled from a corner into one of the workshops. The first thing I saw was a very large machine. This machine qì is similar to the current punch press, as if it is used to punch certain parts.

This workshop is not big, but there are many workshops side by side, which looks like a workshop and a machine, and the division of labor is clear.

I just went down these workshops, one by one. I saw all kinds of machines, including gears, chains, and even a large vessel for melting steel.

It looks like it's just a machine parts processing factory.

I thought about it for a while, and I thought that could it be this place, a place used by the Japanese army to produce weapons? But it doesn't look like it, because the parts produced are very large, and except for tanks, I have never seen a weapon that requires such a thick chain.

With a lot of doubts, I walked down one by one. It wasn't until I got to the last room and saw the four signs "Assembly Workshop" hanging on the top of the room that I knew it was time to reveal the answer.

In the assembly workshop, there must be a finished product.

This workshop is relatively large, almost as big as four or five workshops. When I entered, the first thing that caught my eye was the assembly lines.

Then I saw a corpse wearing a white electrostatic suit, staggering to death on the assembly line. Densely lined up along the assembly line, there must be at least hundreds of people.

On the production line, there are still some parts that are messily placed on the top.

I took a deep breath and walked up to toss one of the bodies to the ground. The corpse had long since decomposed, and only skeletons remained. Around the skull's neck, he also carries a work card with his name and job title marked in Japanese.

I checked the rest of the bodies and found that the rest of the bodies also had the same brand. I think these people are probably Japanese. Because what they were going to assemble was very technical and secretive, it was inconvenient for the Chinese to participate, so their bodies were not thrown into the digester.

However, the bodies apparently died suddenly while they were at work. So much so that when they died, they were still working.

I wondered, what was the reason for these workers to die all of a sudden?

I walked along the assembly line to see what the finished product was. However, until the end of the production line, I did not see the finished product.

I wonder if the secrecy of this kind of thing they made was too strong, so the Japanese soldiers transferred the finished product at the last moment, or destroyed it on the spot?

Just as I was about to reach the end, I suddenly heard a buzzing sound, as if some kind of machine had started.

I was shocked that there were people here.

I didn't say a word, just lay on the ground and looked around vigilantly.

The rumbling sound was still loud, but there was no figure to be found.