The passage leading to the cave is not very high, just over three meters high in modern times. Su Mo climbed the rope down, and Chu Yushan pulled it up, but in a few breaths, he stepped on the ground.

"Okay Yushan, I'm the end. Su Mo raised his voice and shouted upward.

"Childe, be careful. Chu Yushan's voice came down, and he could vaguely see his head looking down at the entrance of the cave.

Su Mo smiled silently, answered, and groped forward.

He had a candle in his arms, but he didn't light it as soon as he entered. Since it was previously analyzed that there is likely to be a lack of oxygen in the cave, this fire cannot be easily ignited.

The feet were rugged, and he felt his hands on the wall of the road, which was also rough and rough, Su Mo took two steps and was suddenly startled.

I just stopped and groped for it little by little. This road is about half a person high, and you have to bow your body when you march. So it's a matter of a few breaths.

Really!

Su Mo finished probing the surroundings, and secretly muttered in his heart. After thinking about it, he took out the fire fold and shook it off and lit the candle, and a halo of yellow light lit up, and the true face of Yongdao was completely presented in front of him.

The rough walls are irregular cylindrical shapes, and at first glance, they seem to be the marks left by some kind of mollusk burrowing.

But stroking the linear traces of different shades of the wall, as well as the surface layer that had solidified and condensed, Su Mo knew that this should be caused by an instantaneous high thermal shock.

The cause of the high heat is the fact that there has been a flow of underground lava in the past. But there is another reason, and that is the impact of some explosive high-temperature gas.

And this Wuqing is located in the land of Hebei, until later generations have never heard of it, there have been signs of volcanoes in Hebei.

So, in this way, the most likely cause of the scene in front of him is the most unlikely cause in his previous analysis: meteorite impact.

Only a meteorite impact would explode such a high-temperature impact around the landing site. Su Mo caressed the wall, and the scene seemed to be reproduced in front of him:

A meteorite fell from the sky at high speed, and because of the friction of the atmosphere, the meteorite was already burning red, leaving a long burning mark in the air. Eventually, it smashed into the earth, and the blazing light shone brightly, accompanied by endless smoke and dust. The earth instantly seemed to crack, and countless cracks stretched out in all directions......

Su Mo's eyes lit up, and his face was full of excitement. I didn't expect to be able to stand in a place where the flying stars fell.

Holding the candle and shaking it forward, sure enough, the entire wall of the passage was normal. The excitement in my heart was heavier, and my feet couldn't help but speed up.

However, he took more than a dozen steps, and suddenly a thought crossed his mind, and he couldn't help but feel a pang in his heart, and his face instantly became solemn.

The candle in his hand kept burning, and he stayed for a few minutes, but he didn't feel the slightest bit of breathlessness, what did this mean?

This shows that this underground cave is by no means only what Chu Yushan said, only an exit dug by Tian Qianli. The hole that led to the outside alone would never have made the air so abundant!

The possibility of poison gas was ruled out, and the possibility of suffocation due to thin air was ruled out. Then the cause of Tian Qianli's death is almost certain, he is scared to death.

In this underground cave where there may be other passages, Tian Qianli was actually scared to death, which was tantamount to reminding Su Mo that there was an unpredictable danger here!

He stood where he was and thought about it, then resolutely turned around and returned, stood down again, and shouted to Chu Yushan above.

Chu Yushan almost came out in response, and his head appeared at the entrance of the cave. Su Mo shouted, "Yushan, throw me a knife, well, it's better to get a whistle stick or something." ”

Chu Yushan responded, turned around and left, and after a while, he shouted to be careful, and with two knocks, a waist knife and a whistle stick fell.

Su Mo picked up the waist knife and tied it around his waist, and then held the whistle stick in his hand, and then he settled down for a while, and turned around and walked in again.

With his previous discoveries, walking in this underground passage again, Su Mo listened carefully, and found that there was indeed a certain sound echoing, although it was very slight and came and went, but it was absolutely there.

It was the sound of the wind, or rather, the sound of air flowing in from other crevices. Halfway through, a lot of sand fell on his head, and Su Mo stopped in shock. Shaking the candle in his hand, he looked back and forth, left and right, frowned and thought for a while, and suddenly came to his senses.

He had thought it was a little strange before, Tian Qianli was locked in a tent, without any tools in his hands, how could he dig through the ground several meters deep overnight. Moreover, according to Chu Yushan, in the morning, Zhang Heng saw him honestly inside, and it was not until more than an hour later that he found out that he had escaped.

According to what Chu Yushan said, it was Tian Qianli who was cunning and deliberately confused Zhang Heng and the others, so that after they relaxed, they could win enough time to escape.

But how could Tian Qianli be sure that Zhang Heng and the others would definitely starve him on purpose and come after more than an hour? What if Zhang Heng and the others did not do this? Or what if they were only half an hour and twenty minutes? In this way, wouldn't it be self-defeating and a waste of precious time?

If you want to say that Tian Qianli has no last resort, then Su Mo will really scoff at it. If Tian Qianli really had that brain, he wouldn't be so stupid as to fall into his own hands like a net.

And it was only at this moment that these doubts were finally solved.

This passage is more likely not dug by Tian Qianli himself at all, but revealed by himself. Time is a certain moment after Zhang Heng and their shifts, and the reason may be the large-scale construction of the entire Shuangling Mountain area now.

It has always been a barren land, neither cultivated nor mineralized, and no one has ever made any major moves on this land.

Until today, Su Mo inadvertently placed the disaster camp here, and coincidentally decided to take this place as the center and build a large scale to Fengshui. It was this large-scale construction, dug and smashed, that finally caused the small tent to shake open, revealing this underground cavern.

There are two obvious proofs to this speculation. One is the surface of the ground, which is almost entirely paved with gravel, and it is still composed of limestone.

There are three main types of limestone, one is caused by the transport and sedimentation of flowing water, one is the evolution of biological fossils, and the other is caused by cataclytic chemical reactions. And finally, what could be more drastic than the reaction formed by a meteorite impact?

The second proof is location. The hole in the little tent was not in the middle, but in the corner of the tent, where the pegs under the corner of the tent were tied.

In this way, there was a concentrated vibration caused by the placement of tents and pegs, and then there was a continuous vibration caused by the uninterrupted construction of the entire ground, which coincidentally loosened the surface of the place and exposed the hole.

And Tian Qianli escaped after Zhang Heng and their shift change, not because he was deliberately confused, but just after that, this pit was formed. With the courage of Tian Qianli who was almost frightened, as soon as he found a possible way to survive, how could he still calm down, and he must have acted without thinking about it.

At this point, except for the reason why Tian Qianli was scared to death that he hadn't figured out yet, Su Mo was already completely aware of the other details.

Take a gentle breath and move forward again. He's getting more and more excited about it now. Not to mention the attraction of the crater itself, which was formed many years ago, just the fact that he had analyzed and found these things and then came to the most correct conclusion had already made him very satisfied and couldn't stop.

The further you go, the lower the terrain becomes, and the higher the height of the entire roadway. In the end, he could already straighten up completely, and even after entering the big hole that Chu Yushan said was like a small house, the whole space was already extremely open, not to mention the slightest crampedness.

Near the right hand side of the entrance of the cave passage, Tian Qianli's corpse was indeed leaning against the rock wall in a sitting posture as Chu Yushan said, and his face was covered with ash and filth.

The eyes that were originally slitted were extremely wide at this time, and the residual shock and fear in the eyes were still clearly visible. His complexion is green, and dark liquid can be seen flowing from the corners of his mouth.

Sure enough, it was indeed scared to death.

Su Mo only made a cursory probe before coming to a conclusion. Then turn your attention to this hole, which is about six or seven squares.

Walking around the entire cavern, as he had deduced at first, there were countless deep chasms in the four walls except for the passage from which he came. It's just that most of them only have some traces left, and almost all of them are sealed by sediment.

There are only a few branches in the crevices, and from time to time you can hear a hint of a sinister sound, which is formed by the wind blowing through the surface of the rock layer through the outside of the rock layer that is not known how thick. It's just that in this dark underground cave, this faint sound is really creepy. It's easy to get in touch with the legendary hell.

Su Mo estimated that most of the reasons why Tian Qianli was scared to death had something to do with this. Zhang Heng shouted that there was a ghost, in addition to being shocked by Tian Qianli's death, this inexplicable voice was also a major aspect.

In the entire cave, except for Tian Qianli's corpse, there were traces of cracks on the four walls that were dense like spider webs, and Su Mo did not find any valuable information. So, how did Tian Qianli's death happen? Just a sound? Su Mo felt that it should not be.

Also, since this is caused by a meteorite impact. So, what about the remains of meteorites? To form a deep hole of this magnitude, there must be entities. After the scorching of the atmosphere, the remnants of the wreckage, no matter how large or small, must have reached an appalling height.

But here, although there were some fine gravel on the ground, Su Mo did not find anything similar to the remains of the meteorite. It's the most powerful place in the middle and downward, but it's more of a thick powdery scorched earth.

Su Mo squatted on the ground, frowning and thinking, but he couldn't figure it out.

Suddenly, he grabbed the whistle stick and looked around. For a moment, he suddenly felt like he was being watched.

This feeling is mysterious and mysterious, and I don't want to explain that there is a reason, but it is so clear, I just have that feeling. He even had a feeling that was extremely weird, as if his soul was throbbing a little at that moment.

Later generations have no agreement on whether people have souls or not. But Su Mo, who has gone through this kind of thing, is 100% sure that the soul really exists.

But because of this certainty, he felt even more inexplicably frightened. The theory of the merging and separation of the soul and the body must also be true.

His current body is not the original soul of the original. At this moment, since there is a feeling of soul throbbing, will it cause unpredictable changes? If you extend it a little more and think about it divergently, will your own crossing and soul parasitism be related to this kind of throbbing in Su Mo in Wuqing County, Ming Dynasty?

He couldn't help but sweat coldly, and in just an instant, countless unbelievable thoughts flashed.

It was said that it was actually an illusion that he was scared of himself, and the feeling of Fang Cai for a moment had disappeared now, but Su Mo knew very clearly that Fang Cai's feeling was so clear at that moment, it was definitely not an illusion.

Slowly let go of the whistle stick, but his hand reached to his waist, pulled out the waist knife little by little, and held it tightly in his hand. He could feel that his palms were full of cold sweat and wet at the moment.

Stuck the candle on the ground, took the knife in his hand, wiped the sweat of his palm on the placket, and his eyes shrank violently in an instant. That feeling is coming again!

He took a deep breath, tried to suppress his heartbeat, and the next moment he turned around suddenly, and in the corner of his eye, something seemed to flash away. Suddenly, he felt his heart beating like a drum, and the green tendons on his forehead jumped suddenly.

Something! Something, indeed!

His eyes stared at the place where the thing had disappeared in a flash, holding the knife in both hands, bowing slightly, his whole body like a tensed bow, trying to let go of all his spirits, and feeling his surroundings carefully.

Could it be that there are really fucking ghosts in this world?! At this moment, his sincere insistence suddenly became less firm.

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