Ma Qian and Zhao Baixiong originally wanted to climb out through the slide at the entrance of the metal machine, but they didn't expect to fall down just halfway through. The two people did not fall into the original metal can, but fell into an inexplicable annular hole, this hole has no exit, the thickness of each part is the same, the two people in the inside after a few turns, desperately sat on the ground.

"Lao Qian, looking at the appearance of this cave, it shouldn't be a natural formation, if it's not a ghost, someone must have built it, since it's artificially built, it's impossible to get out, don't you say?"

"I also think so, we can fall in inexplicably, and other people will also fall in, you see the white bones on the ground, it may be the person who fell in unintentionally, because he can't get out and die in it. We must not be in a hurry, check carefully, we will definitely find an exit". Ma Qian was obviously calm, and his heart was also beating a drum, this hole was too weird, ordinary, but it was a more terrible death than a death trap.

Ma Qian threw Zhao Baixiong a piece of bread, and then said: "Eat something, suppress the shock, and replenish your strength by the way, and after a while, the two of us will knock on the top of this hole separately, I think, the two of us should have fallen off in a certain part of the top of the cave, if there is a mechanism, it should be able to knock it out or see it, Zhao Baixiong, don't worry, we will be fine, we will definitely be able to go out."

This time, Zhao Baixiong rarely made no sound, very quiet, probably tired of tossing, and didn't want to talk anymore. There is no luminous body in this cave, it is dark, thanks to the wolf's eye flashlight in his hand is enough, and the battery is also sufficient, otherwise it will be miserable, just like a blind man.

They didn't speak again, and the two of them finished their bread silently, and then got up and nodded to each other, and they both had to speak, and in this strange cave, talking more would be more annoying. The two men took their rifles and inspected the roof of the cave in two directions, one to the left and the other to the right, striking the top of the cave with the butt of their rifles as they went, and from time to time illuminating the roof with flashlights in an attempt to find clues.

After about ten minutes, the two met, there was no joy on their faces, they were relatively silent, it seemed that there was nothing suspicious on the roof of the cave, so the exit was probably on both sides of the cave and above the ground.

After making eye contact, the two misplaced themselves and moved on. No one looked back, and kept hitting the walls of the holes on both sides with the butts and barrels. Zhao Baixiong rarely does things so carefully, in Ma Qian's heart, Zhao Baixiong is generally difficult to maintain such concentration except when shooting, it seems that the environment will change people, in this underground confined environment, no one will want to stay here for a minute longer, and the same is true for Zhao Baixiong, a person who is sparse.

This cave is also really strange, the stone walls on both sides are very dry, and there is no moisture at all. Ma Qian knocked down all the way, and found nothing suspicious, the stone walls on both sides were the same as the stones on the top, all of them were solid stones, and there was no hollow situation.

His heart was getting heavier and heavier, and the larger the area he was examining, the worse his mood became, and Ma Qian felt that the black hole in front of him was like a huge poisonous insect about to devour him. He had never felt so frightened, there was no danger in sight here, there were only two people in the cave, him and Zhao Baixiong. But Ma Qian felt that this place was more terrifying than the Snake Valley in Burma, the underground sea of Toad Mountain, and the ice sheet of the Sea of Okhotsk. Although there are no giant snakes, no wild boar herds, no giant toads, no wolves, no blood crawlers, and no self-defense forces, this black hole that will never go to the end is like a demon, and it makes it difficult for him to breathe.

The more Ma Qian walked forward, the more his eyes became flowery, and his brain was a little unclear. He was still wondering if he was too stressed, or if there was a lack of oxygen here, and it seemed that he was going to die here.

The drowsy Ma Qian suddenly heard someone shouting his name, although the voice was not loud, but it was very clear, Ma Qian was shocked, and he woke up at once. It turned out that after walking a few laps in this annular hole just now, he had a dizzy hole, and it was not a lack of oxygen. Now as soon as he heard someone shouting him, he suddenly came to his senses, it was Zhao Baixiong, Zhao Baixiong was shouting Ma Qian. In this case, there are only two possibilities, one is that Zhao Baixiong has discovered the exit or entrance, and the second is that Zhao Baixiong is in danger. No matter what the situation was, what Ma Qian could do was to rush in front of Zhao Baixiong as quickly as possible.

Ma Qian didn't turn around, he kept running forward, according to his estimate, it had been five minutes since the two broke up, and it should be faster to run forward.

Ma Qian's speed was very fast, and the oxygen in this hole was thin, so he didn't run a few steps before he gasped heavily. He had to slow down, he couldn't run too fast, or he would lose his life.

When Ma Qian ran to Zhao Baixiong, Zhao Baixiong was lying on the cave wall on the left and listening, he didn't greet Ma Qian, he just listened carefully, as if he really heard something. Ma Qian saw that Zhao Baixiong was not in danger, so he was relieved, and he also leaned on the cave wall on Zhao Baixiong's side and listened.

Inside the cave wall, there was a subtle sound, like the sound of water flowing, and like the sound of some kind of machine starting. "What kind of voice is this, Zhao Baixiong, how did you hear it?"

"I knocked on it with the butt of my gun, and I heard the sound of the air, so I decided that it was empty, and when I went up to it and listened, there was still the sound of water inside, but I couldn't find the mechanism to open this place anyway."

This section of the cave is the same as the rest of the cave, and the texture of the stones is the same, except that when you knock on the stones here, you hear the sound of the air. Apparently there is a mechanism in this, or this is an entrance, and the next step is to find a way to open this stone door.

Ma Qian and Zhao Baixiong still acted separately, and the carpet groping that unfolded within 30 meters of this cave, as long as it was a suspicious thing, none of them could be let go. The attacker paid off, and Ma Qian finally found a coin-sized part on the ground that was different from the color of other stones. He pulled the part open with his saber and found that it was not rock, but dirt.

Dirt again? There must be something strange about this cave when it finds dirt underneath the poisonous honeycomb, only to open a passage and the four fall into the huge metal canister that crushes the stones. I don't know what the soil here is used for now?

Ma Qian dug out all the dirt, and at thirty centimeters, there was a metal ball. Ma Qian called Zhao Baixiong, and the two of them observed the ball together.

"This ball should be a mechanism, as long as the ball is lifted, it may be possible to trigger the mechanism, thus opening a door", Zhao Baixiong has the experience of the last time, and this time he is full of confidence.

"Don't talk nonsense, you don't have a long brain, how can you put your hand into such a thin hole, the ball is at the bottom of the small hole, you can't hold it at all."

"That's right, since you can't take it, it's possible to press down, and if you press the ball down, it may also trigger the mechanism." Although Zhao Baixiong was not full of confidence this time, Ma Qian also felt that he had some sense.

Ma Qian took out a silver chopstick from his backpack and reached into a small hole thicker than a coin, and he pulled the ball downward, but the ball was very resistant and did not move. Ma Qian increased his strength, only to hear a "click", the ball was gone, and then he heard the sound of "click", which was really from the stone wall with the sound of water. The two of them paid close attention to the stone wall, which slowly opened a square opening of one meter square. With a flashlight, it was very dark inside, Ma Qian and Zhao Baixiong didn't care if there was danger inside, and they rushed into the opening, they knew that once they acted late, the opening might close automatically.

When I went inside, I found that it was a space that was only a little more than a meter high, which was very low. The most incredible thing is that this space is actually very small, in addition to being only a little more than one meter high, it is only about three meters long. This is an exit, this is a dead end, the two of them just wanted to turn around and run out, but it was too late, and the hole was slammed shut.

"I'll go, won't it, lock us inside" Zhao Baixiong hurriedly smashed the hole that was closed, it didn't work, it was very strong there, and it couldn't be smashed.

"Stupid, how could you be so impulsive, and jump in without seeing the situation inside" Ma Qian blamed himself deeply. And Zhao Baixiong was beating around in this small hole, although the hole was narrow, but it was very strong, Zhao Baixiong tossed around, and found nothing.

"No, Zhao Baixiong, did you find it, this small hole is moving by itself", Ma Qian, who was sitting on the ground, felt that the hole was moving, and Zhao Baixiong also felt it, what was going on, how could the hole be moving by itself, could it be an earthquake?

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