It turns out that this is the case, this kind of monster of white bones, it is the first time that we have close contact, and Professor Shan is not the first time, since he was in that ruins park, Professor Shan has come into contact with Zhang Liangchen, and at that time Zhang Liangchen is estimated to be already a white bone, and in that underground space, Professor Shan has closer contact with Zhang Liangchen, knowing what people will become when they practice this kind of white bone to a certain extent. The update is the fastest and the fastest to the eye

Professor Shan went on to explain, "When I realized that there were secret doors, I thought that there must be mechanisms controlling these secret doors, and someone is manipulating these mechanisms according to our location, but there are no cameras in the cave, how can they know exactly where we are?"

I also looked closely, and there were no peepholes in the possible locations, and if there were, they could be easily spotted by airflow in such a relatively enclosed space. Since there are no peepholes, how do they know our exact location?

I thought of the bones on the wall.

For ordinary people, they would never think that white bones would be living creatures, but for me, I have seen the kind of living white bones with my own eyes, that is, Zhang Liangchen and them, I have told you all this before.

The bones on the wall were all intact, so I immediately thought to myself if these bones were playing tricks, that is, these bones were not ordinary bones, but maybe they were living bones that had passed the White Bone Pass, and they could activate the mechanism to trap us according to our location.

However, there is a difference between living bones and real bones—the bones of living bones appear densely structured, moist, and flexible, while those of real white bones appear dry and porous, and can be easily distinguished if you look closely.

What's more, the living white bones that have practiced the 'White Bone Pass' will have eyeballs on their heads, and according to the current observations, although the White Bone Pass can internalize all kinds of organs into the bones, it seems that only the eyes cannot, so no matter how well they practice the White Bone Pass, their heads will not become white bones like other parts of the body.

Based on this, when I saw that the heads of some bones were covered with rags, I was even more sure that my judgments were correct, and so I came up with a way to get out of the hole. ”

After this operation, we are even more impressed with Professor Shan, and in the battle against these monsters, we have another leader.

Of course, everyone still has a question they want to ask Xiao Lei the most - what happened to him, suddenly there was a scream, and the walkie-talkie was also broken.

Xiao Lei told us that the scream was indeed not from him, but when he entered the cave, he was talking to us on the walkie-talkie, and suddenly this scream appeared, because the scream was too sudden, Xiao Lei's hand shook, and the walkie-talkie fell to the ground.

But what's even more strange is that - after that scream, not only did the walkie-talkie fall to the ground, but the flashlight in Xiao Lei's left hand suddenly went out, which made Xiao Lei puzzled, could it be that the flashlight was broken by the scream?

Another point: It is said that our walkie-talkie is of very good quality, even if it falls on the ground, it will generally not be broken, but Xiao Lei was in the dark, groping on the ground to pick up the walkie-talkie, and found that the walkie-talkie was also broken, although its appearance was intact.

And all this, by no means, is definitely not a coincidence, it is almost certain that it should be caused by that scream. But who made that scream? We are now puzzled by the existence of such energy.

After a brief discussion, we decided to enter the cave again, because the current situation forced us to wait any longer, but after the first attempt, we knew that this cave was mysterious and abnormal, and there must be many unexpected hardships.

It turned out that the cave where the blind man hid stretched for hundreds of miles underneath, although we did not have the bottom of the length of this cave, but just now our flashlight could not shine at the end, and there was also that grand sense of emptiness, which made us feel that the scale of this cave was still long, and it must not be small.

Of course, for another expedition into the cave, we made sufficient preparations, food, books, weapons, flashlights and other equipment, we all brought it, just like last time, Old Man Ouyang and Mr. Chen were still waiting at the entrance of the cave, while Monkey Eagle entered the cave with us.

The Hind Eagle is our most advantageous weapon, it has an irreplaceable advantage in the cave, and has saved us more than once in the cave.

Because of the experience of the last time, this time the hole was very smooth, and soon we arrived at the place last time, and we couldn't bear to look back, and found that the corner was just a meter away, and it didn't happen last time.

Whether it's the white bones on the walls, or the scattered skeletons on the ground, it's still business as usual, nothing has changed.

So, we calmed down a little and continued to walk inside.

To everyone's surprise, this time it was surprisingly smooth, the tunnel inside was not only straight, but also flat and tall, three or four meters high, and after walking a distance inside, the white bones on the ground and on the wall disappeared.

But the strange thing is that the roof of this cave is not constant, but the further you go in, the lower the roof becomes, but to a certain extent, it becomes higher, that is, the cave is like a pipe of irregular size.

When we walked inside, Professor Shan was specifically responsible for observing the white bones on the cave wall this time, in case there would be living white bones on the wall plotting against us. However, this time, because of Xiao Lei's companionship, everyone is a lot more down-to-earth, and in terms of reaction speed and combat effectiveness, the ten of us are not as good as Xiao Lei.

In this way, everyone took the flashlight and kept walking inside, and I don't know how long I walked, Xiao Lei suddenly asked everyone to stop, he seemed to suddenly think of something, and before we asked, I heard Xiao Lei say: "I just looked at the watch, from our departure to the present, we have walked for thirty minutes, our travel speed, about five kilometers per hour, so, the distance we have walked, about 2500 meters."

Do you know what it means to be 2,500 meters in a horizontal cave? ”

When we heard Xiao Lei ask, we were all at a loss, walking 2500 meters is just 2500 meters, what else can it mean?

Seeing that none of us answered, Xiao Lei went on to explain in detail: "I don't know if you have noticed, this hole is not only straight, but also horizontal, that is, it has no ups and downs, and there is no change in height in the level, which shows a very important point・・・・・・・

"I know, it means that this cave was built by man, not by nature, right?" Before Xiao Lei finished speaking, Sister Li replied half-jokingly and half-seriously.

Everyone couldn't help but laugh.

Xiao Lei also smiled and shook his head a little helplessly and said, "What Sister Li said is right, but what you said is the same as not saying it, everyone knows this." "I know that Sister Li said this deliberately in order to ease the atmosphere.

"Oh? Tell me, what else does it mean? Sister Li then asked.

Xiao Lei opened his mouth, and just as he was about to answer, something unexpected happened--that mysterious scream suddenly appeared again, and I felt that scream, as if it had shaken our internal organs, and even every nerve, making me numb, my brain blank, and I almost sat on the ground.

When I came to my senses, I found that all our flashlights were extinguished, I subconsciously slapped the flashlight with my hand, it was useless, it was still not lit, in the dark, I heard Xiao Lei hurriedly shouted in a low voice: "Lower your body, quickly, I will stand against the wall."

In the dark, we felt each other's positions with our sense of touch, and quickly gathered together as Xiao Lei said, hunching our waists and lowering our heads. Everyone's hearts were beating wildly, and they didn't know what was going to happen next, especially in the dark, and the fear was even stronger.

At this time, I heard the female translator say: "I originally had a night vision device, but unfortunately I forgot to bring it in." ”

And the madman six suddenly said without a head: "Even if you bring a night vision device, I'm afraid you will be shocked by that scream." "I seemed to think that Crazy Six had something to say, but he didn't continue, and no one else asked, so I didn't ask him why he said that.

At this time, I heard Xiao Lei say: "I haven't finished what I said just now, some scientists have done relevant research, in a cave, in the horizontal direction, when the distance is more than 2,000 meters, then at the entrance of the cave, you can kill the people in the cave with sound." ”

Although we couldn't see each other's expressions in the dark, I was sure that everyone must have been shocked when they heard Xiao Lei say this.

"Xiao Lei, you're not kidding." Tian Liwen, who had not spoken, couldn't help but question.

"At this time, I was not joking, when the sound travels long distances in this horizontal, straight pipe, there will be a wonderful amplification effect, if this amplification effect, and then when it occurs with some resonance phenomena, it will burst out with a huge amount of energy, you have all seen it just now, just now our flashlights, were all broken, of course, and the previous walkie-talkie, was also damaged by this sound.

You can see how powerful this sound is. Moreover, this kind of sound is the sound that has been amplified by this cave, and if the sound is not amplified, it is difficult to have such great power. ”

Xiao Lei said this, although I can't fully understand it, but I also roughly know what he means, the echo wall in the Forbidden City may have the same principle as this.

At this time, I heard the madman six say: "When I was training in the military command before, I heard a similar example, saying that the Germans had done experiments in this area, and they had dug caves for several kilometers in the mountains of northern Europe, and said that through this kind of cave, they could kill people with their voices -- put people in a specific position in the cave, and then make a sound at the mouth of the cave, and that sound was amplified again and again after passing through the special structure of the cave, and became a weapon of great energy.

It is said that the German Nazis used this kind of cave to slaughter thousands of Jews, and these Jews were really bleeding to death by this amplified sound wave, and many people's eyeballs even burst out. ”

The words of Crazy Six made us feel even more creepy