Gao Moli's expression made me feel that the matter was a little serious, and I hurriedly held my breath and pricked up my ears to listen to the movements around me. The overhead tactical spotlight was also depressed, creating a stationary circular spot on the stone beam.

There was silence in the cave, save for the faint breathing of a few of us. I didn't think I was hearing, so I tilted my head slightly, my ears trying to catch the movement around me like radar, but the darkness seemed to be still, and there was no sound at all.

I glanced at Gao Moli and wondered: Could it be that the sound he heard was intermittent? Did we miss out on what we just said? Or maybe the voice he was worried about hadn't even sounded yet.

The cave we are in is not a natural formation, but was caused by external factors during the Western Zhou Dynasty. There used to be a huge monster living here, and its strength can be judged by the scratches on the cave walls and the bite marks on the skull in the bronze ding. The ancestors were frightened, called the monsters living in the caves the mountain gods, and continued to sacrifice the heads of slaves in copper tripods and the sap of the dragon's blood tree. We speculate that the monster was no longer there when the Han Dynasty Yizhou Thorn Tomb was built, but this is only speculation.

We didn't know how deep the cavern inside the mountainside was, how wide it was, and why we ran so long and then ran back away. I just felt that this cave was strange and unpredictable, and there was a sense of crisis all around.

As soon as I was quiet, I realized that my body was full of coldness, and I don't know if it was because I was nervous and afraid, or because the temperature around me was indeed much lower.

After listening quietly for more than a minute, I couldn't help it anymore and asked in a low voice, "Did you hear anything?" ”

The black bull shook his head and replied in a low voice, "No wow." There was no movement at all. ”

Gu Yixin also shook his head and did not speak.

Gao Moli frowned and asked, "Didn't you hear?" It's as if the ice is cracking. ”

"The sound of the ice breaking? Is there ice in this cave? The black bull said, stretching out his fingers and plucking his ears, and listened hard again.

I wondered: Black Tiger Mountain has a subtropical climate and a special geographical location, and it rarely freezes even in winter, especially since it is early spring. There is no light at the upper end of this cave, it should be a space enclosed in the belly of the mountain, although it is gloomy and cold, but it should not freeze, where did the subtle cracking sound that Gao Moli heard come from?

"Huh? Stopped. Gao Moli muttered to himself.

"Since the voice has disappeared, it means that it is not a dangerous situation for the time being, I think our top priority is to break the current ghost barrier first, or even if there is an emergency, we will have no place to escape, right?" The black bull said and looked at the stone wall forty or fifty meters ahead again. "What's the matter, little brother, borrow some boy pee."

I glanced at the stone wall in front of me, and the stone wall was actually there, and the carved ghosts on it were clearly outlined, and the colors were dull and mottled, which seemed even more eerie at this time.

"Do you think the ghost hitting the wall is really a ghost? There is a scientific basis for this: the so-called ghost hitting the wall, the scientific explanation is that people lose their sense of direction in the process of movement, that is to say, they get lost, and the reason for this phenomenon is that people's own perception is biased. The essence of biological motion is circular motion. If there is no goal, the instinctive movement of any living being is a circle. The cave was dark all around, and we were heading in the direction of following the burning human bone soul-attracting lamps, which may have been arranged in such a way that the catacomb's designers manipulated the correction signals received by our eyes and brains, and we thought we were following a straight line, but we were only following instinct. In addition, in the process of running, there is a difference in the length and strength of the two legs, and the distance of the steps taken in this way will be different, for example, the distance of the left leg is long, and the distance of the right leg is short. ”

"So what?" Hei Niu said impatiently: "Lao Su, you talked about it for a long time, and you didn't say how to crack it, sometimes I really can't stand your nerdy anger." ”

I continued: "Don't worry, as long as we straighten out the reasons for its formation, we can find a way to crack it, as the saying goes, as long as the mind does not slip, there are always more ways than difficulties. If it's really a ghost hitting the wall, the way to crack it is actually very simple, let's maximize the illumination distance of the searchlight, and then the first person lights up and stands still, the second person and the third person walk forward along the pillar of light together, and the second person stands at the end of the beam, and the third person continues to follow the beam shot by the second person, and at the same time, the first group of people follows and follows the beam shot by the third person...... And so on, although it is troublesome, but at least it can ensure that we are moving in a straight line. ”

After I finished speaking, everyone was silent for a moment, and Gu Yixin said: "I think this method is theoretically feasible, but will there be greater security risks if we disperse our actions?" ”

"I don't think there is much hidden danger, we are all in each other's sight, there is a situation to greet, and we can run over to support in three or two steps." Hei Niu urged: "It's better to act than to move, let's divide into groups now, counting the wolf's eyes, we have a total of three lights, Xiao Gu you and Lao Su are in the first team, and my little brother and I are responsible for the second and third shifts respectively." ”

I looked at Gao Moli to ask for his opinion, he was still standing on the edge of the stone beam, turning off the wolf's eye flashlight, vigilantly annotating the endless darkness below the stone beam. His state of imminence made me feel uneasy.

I said to the black bull: "Wait a minute, the guy we used to defend ourselves before has lost it, it's bad, you see if you have any equipment in your backpack, take it out and divide it." ”

Along the way, Gu Yixin's equipment bags and I have been discarded one after another, but fortunately, Hei Niu has always regarded the bag as his life, and he has not taken it off several times in critical situations. Black Bull never does useless work, and his backpack is full of practical guys.

I handed the searchlight to Gu Yixin and asked her to help light it on the side, and then squatted down with the black bull to open the backpack.

"Didn't you say it earlier, I already wanted everyone to learn from Lei Feng to help me share the burden, but I just saw that you old and weak soldiers were embarrassed to speak. However, it is strange to say, since I entered this cave, I feel that this backpack is getting heavier and heavier, and now it costs fifty or sixty pounds, to say the least. The black bull rummaged and grummaged.

I know that black bulls generally don't complain about doing manual work, and there is no difference between twenty catties and thirty catties of weight, but now that he says this, he must feel that something is wrong. I originally thought this black hole was weird, but now when I hear the words of the black bull, I feel even more incredible.

I subconsciously grabbed the backpack with both hands and shook it, the backpack was unusually heavy, as if it was full of stones. The Black Bull's backpack looks very large, but in fact, most of it is filled with things that take up space, and in any case, it should not be heavy to this extent.

"What's going on? Pour it out and see if there's something in it? With that, I turned the black bull's backpack upside down.

There was a loud noise, and all the contents of the bag fell onto the stone beam, and I took a look at it, and the tools that could be used for self-defense were: a Luoyang shovel made of black iron, a diamond umbrella, a retractable triangular knife, a big black eagle bow and crossbow, and a large box of steel balls and a small bundle of arrows that matched it. In addition, there were climbing ropes, cold fireworks, glow sticks, incendiary flares, and a tent cloth that a black bull had pulled from the mercenary camp, black explosives and a bottle of white liquid, which I unscrewed the lid and smelled, and the bottle turned out to be spirits.

From the equipment in front of me, it can be seen that the middle-aged man who helped me prepare these things is a master of gold touching, and it can also be seen that his prediction of the difficulty of our gold touching this time is very high.

"Damn, there's a bow and arrow, this thing is designated to be a good one, I really regret that I didn't open my backpack earlier and take a look." The black bull touched the big black eagle bow and crossbow on the ground, held it in his hand and looked at it repeatedly, and his face bloomed with joy.

Gu Yixin looked at the black bull and said: "This kind of bow and crossbow is called the Great Black Eagle, it is a professional dual-purpose bow and crossbow, which can be used to shoot steel balls and shoot arrows that match it. It has the characteristics of long range, strong penetration, high accuracy, and personality in appearance. Its bow blades are assembled with eight-wheel component pulleys, which can reduce the winding force by more than two times; Its special trigger system allows it to feel less comfortable and sway lightly when firing, thus improving the accuracy of shooting. ”

I don't know much about weapons, and when I heard Gu Yixin say this, I only felt that the big black eagle should be a more competent long-distance self-defense artifact, but I didn't have the heart to observe it carefully at this time, but secretly thought to myself: The weight of these things is only twenty or thirty pounds, why are they so heavy in a backpack?

"We'd better hurry up." Gao Moli suddenly turned to us and said, his words sounded like suggestions, but they were actually a command for us.

The black bull picked up the big black eagle on his back, took out two small boxes of steel balls and a few steel arrows and put them into his small shoulder bag, and hurriedly packed the things that he couldn't use for the time being into the bag. I took the diamond umbrella and handed it to Gu Yixin, threw the triangular knife to Gao Moli, he caught the handle of the knife with one hand, rotated the direction in his palm, and at the same time shook it hard, and the triangular knife stretched out instantly. The blade of this knife is prismatic, with blood grooves on three sides, and the hardness is excellent, making it a sharp weapon for close combat.

I picked up the Luoyang shovel on the ground, and then prepared to take the two spiral iron pipes on the ground, just screwed one section, but found that the other section was slowly rolling towards the stone beam. The speed was unhurried, as if it were attracted by something, and the force that attracted the spiral iron pipe seemed to come from the endless darkness below us.

The black bull and I saw this scene at the same time, and were just about to speak, when suddenly we heard countless small cracking sounds from the bottom of the black hole, the sound was extremely subtle, but quite dense, and it made people feel chills after listening to it.