Tang Shuxing's analysis made Gu Yan have to nod and admit that Vivian's matter must be fake, although Zhan Tianya had suspected it back then, but there was no way to confirm it, after all, the Asian and European forces were already in a state of complete defeat at that time, and it was even more difficult to verify the identity of the female corpse.

"And one of the scariest places." Tang Shuxing squatted down and pointed to the twenty-centimeter-long wound on the chest of one of the soldiers, "This wound penetrated from the front to the back, not to mention what caused it, how many years has it been since the Cold War?" There's a certain temperature in this hole, right? You see the wound, it's exactly the same as what was just done, the body is not rotting, and what we just smelled is the smell of fresh blood, not the smell of rancidity. ”

Gu Yan looked around: "In other words, this place is a completely sterile environment. ”

"Maybe, if that's the case, one of the two of us is not far from death." Tang Shuxing smiled, raised his feet and continued walking towards the cave in front of him.

Gu Yan stood there looking at Tang Shuxing's back, knowing what he meant. In a completely sterile environment, people stay too long, on the contrary, it is also a bad thing, human cells are actually full of bacteria, as someone once said, human beings are standing at the top of the food chain, in fact, this is completely wrong, because many bacteria in the human body are completely dependent on living humans to survive and reproduce. If you are in a completely sterile environment and your body functions are intact, you can continue to survive without leaving this environment, but once you leave, it will not be long. Because the body has lost its adaptability and immunity to its original environment, a simple cold or flu can kill him.

Gu Yan looked at the soldiers on the ground who were still wearing chemical protective suits, thinking that this was ridiculous, and at the same time wondering what killed them, it seemed to be a strange creature.

Tang Shuxing turned around and pulled out the Yin Bee and threw it to Gu Yan: "Use a knife, sometimes it's better to use a knife than a gun." ”

Gu Yan nodded: "Thank you." ”

"Don't thank me, I just don't want you to be dead, or seriously injured, I don't bother to take care of you, and I don't bother to bring your body back." Tang Shuxing said as he walked. "Even if you're dead. I will take your body out, and I will also bury you directly in the snow outside, write down the coordinates, and go back to tell Sù Zhan Tianya. Let him dig it himself. ”

Gu Yan smiled: "You are really cold-blooded. ”

"We're not related. I would be willing to take risks with you. I'm already looking up to you. Tang Shuxing was also laughing as he spoke, and then the smile froze, and he squatted down. Looking at the traces of the cleaning on the mud floor of the cave, there were other marks like broom sweeping around the thick marks.

Gu Yan stepped forward and asked, "What is this?" ”

"I don't know." Tang Shuxing pulled out the dragon blade, "Follow me, don't get separated, if there is an emergency, I will lead away the things that attack us, you stay away from me." ”

Gu Yan looked at Tang Shuxing: "Why do you think I'm going to hold you back?" ”

Tang Shuxing stopped: "Okay, then you go and deal with it, I'll run away, okay?" ”

"Let's deal with it." Gu Yan looked at Tang Shuxing.

Tang Shuxing shook his head: "It seems that you don't have a lot of experience, you don't know how many things in this world you can't face and can't explain how to save them." ”

The two of them continued to move forward, the cave in front of them became larger, it was full of hills, at a glance, it was a deliberately simulated terrain, and the bones of large animals could be seen from time to time around, and there was a skeleton in the farthest distance that should be a dinosaur, standing on the side next to the cave wall, judging from the appearance of the bones, it seemed that this long-necked dragon was forced into a desperate situation by something, and finally had to wait for death there.

"It's like a saber-toothed tiger, and it's a dinosaur over there, so I can't tell what this one is." Gu Yan squatted there and watched, "What the hell is this place?" ”

"A proving ground, or a testing ground." Tang Shuxing held his sword and struck vigilantly, "Look at the bones here, it should be that ancient humans deliberately put these things here to fight, and see what kind of things survived in the end." ”

"Survival of the fittest?" Gu Yan said.

"Yes." Tang Shuxing nodded, then looked around, turned on his headlamp, gathered the brightest spot, and then illuminated the position of the cave wall facing the direction of the tunnel twenty meters up, "Look over there." ”

Gu Yan also adjusted the lamp to shine there, and then saw that there was a horizontal and long gap there, and visually, the height of the gap was only about 20 centimeters.

"What's that?" Gu Yan asked strangely, putting on a night vision device and looking at it carefully, "Window?" ”

"I look like an observation window." Tang Shuxing nodded, and slowly walked over the surrounding hills towards the cave wall.

Gu Yan shook his head behind him: "But why is it so narrow?" It's hard to observe. ”

"It's narrow, but it's long." Tang Shuxing stopped when he walked to the cave wall, and there were still about ten meters to go, and looked up.

Gu Yan still didn't understand: "Even if it's long, it won't play any role in observation?" ”

"Yes, you can move left and right to see, why is it only so high, I guess the reason is because of this monster below." Tang Shuxing looked around, turned around and pointed to the position he came from before, "The wounds on the corpses of those soldiers at the other end of the tunnel are basically about 20 centimeters, this monster is definitely not small, and it can attack far away, but the size of the weapon attacked by that monster is less than 20 centimeters, so it can't pass through the window above, and it can't hurt the people who are observing inside." ”

"Yes, even if the window is long, the monster is standing underneath, and if it wants to attack, it is impossible to jump up and attack horizontally, so it doesn't matter if the window is long, as long as the height is appropriate." Gu Yan understood this time.

Tang Shuxing nodded: "So, I have come to the conclusion that this monster is at least close to a human in size, or larger than a person, fast, intelligent, and at the same time attacks far away, but it can't climb, and the strength of the attack is not enough to smash the cave wall, otherwise, the monster would have already expanded the window above." ”

Gu Yan found a higher point and looked around: "Are you saying that this is also a sterile environment now, and this monster is still here, but the surroundings are unobstructed, and it can't be hidden." ”

Tang Shuxing smiled at Gu Yan, and then suddenly rolled and hid in a small hill next to him, Gu Yan immediately jumped over, thinking that he could find Tang Shuxing, but he didn't find anything after he rolled into the small hill, at this time Tang Shuxing was already standing behind him and stabbed him in the back with his fingers.

Gu Yan turned to look at Tang Shuxing, Tang Shuxing smiled at him and said: "You may have rich experience in infiltrating spies, but you don't have enough experience in on-the-spot combat, any well-trained soldier, in this environment, it is very simple to find a hiding place, in the same way, if it is a creature familiar with this environment, it can hide while constantly moving its body, unless you have a group of people to help and occupy the top of each hill, otherwise you will only be perfectly attacked by it alone." ”

In fact, at the moment when Tang Shuxing suddenly appeared behind Gu Yan, Gu Yan was already frightened into a cold sweat, and at this time he had to admit that his combat experience was not enough, and nodded expressionlessly towards Tang Shuxing, and then asked, "What now?" What do we do? ”

Tang Shuxing grabbed the dry food from his backpack: "Eat, rest, find the entrance, and continue to move forward, but the place to eat should be divided, you are at the end of the tunnel, and I am here." ”

Gu Yan shook his head and asked suspiciously, "Why?" ”

"You fish, I'll be the bait, understand?" Tang Shuxing pointed around and said, "Do you think that if we don't find that monster, it is possible for us to find the entrance?" ”

"Why?" Gu Yan frowned.

Tang Shuxing took a deep breath: "Think about it, this monster in this place can eat dinosaurs, but there is no obvious door in the tunnel, which shows that ancient humans are not worried about it getting into the tunnel, because the temperature there is much lower than here, so this thing can only stay in this environment, at the same time, we only found this one entrance and exit when we came in, but there are no other entrances and exits around this cave, this is unreasonable, there must be one here, it is hidden, only the monster knows, do you know why?" ”

Gu Yan looked at Tang Shuxing, in fact, he could have calmed down and analyzed, but Tang Shuxing was instantly stunned, so he had to shake his head.

Tang Shuxing said again: "This monster is definitely not naturally formed, it was synthesized by ancient humans, where was it synthesized?" There must be a real yàn room or something behind the cave wall, and there must be an entrance and exit to put it in after the synthesis, right? ”

Gu Yan nodded: "But it doesn't necessarily remember, and after so many years here, can this monster live?" ”

Tang Shuxing pointed to a skeleton on the ground and said: "Look at this bone, after so many years, the bones have not weathered or shattered into powder, which means that this thing that was eaten by the monster has only been put in for more than ten years, in other words, the monster that is still alive here may have been created for only a few decades, and it may not remember how it was put in, where the entrance and exit are, but it must know where the real yàn was sent, that is, where the food for it came from." Think about it, you find a cage to raise a dog, every time you open the cage and put meat for the dog to eat, in the long run, in the future, you only need to do a meat action, do you think the dog will wait at the door of the cage? ”

Gu Yan nodded: "I see." ”

Tang Shuxing grinned: "What you learned from Zhan Tianya is really one-sided, you can infiltrate the Resistance Army, if you are not lucky, or otherwise, the Resistance Army is all a bunch of straw bales, no wonder you will be beaten by the Shangdu Defense Army like that." ”

Gu Yan was noncommittal in the face of Tang Shuxing's words, just smiled, and according to Tang Shuxing's instructions, he turned around and walked towards the tunnel with his bag on his back, while Tang Shuxing directly chose a commanding height, sat down to eat and drink, and stuck the dragon lin blade aside, while carefully observing the surroundings. (To be continued......)