"Even if this method is used, the iron pestle can be sharpened into a needle, and it will take decades to lay the foundation." After the fat man saw the situation of the old generation's experiment, he was indeed shaken, but he still had some doubts about this way of looking at it.

"It won't take that long, as long as it is matched with the corresponding tools, dozens of people or at most less than 100 people can chisel it out in three or four years." The old man slapped his hands clean and walked back to the edge of the shaft: "How do we go down?" ”

Before he could finish speaking, I raised the rubber band in my hand. Then we began to climb downward, the buckle between the bands has been tested, very strong, but it is a pity that there are only two sections of the bands, if you pull down the maximum may only be ten meters up and down, but the shaft below is close to fifteen meters, so between the vacant more than five meters, we have to jump directly. This is not the most important thing, the height of five meters, as long as it is well controlled, we can climb down with the help of the shaft wall. The key is that these two rubber bands, after we go down, we can't recover them, not only may we encounter new shafts on the next journey, but we will also not be able to return smoothly.

The most fatal thing is that the fat man and the old generation don't pay attention to these problems at all, they just blindly want to hurry down and find Maitreya. So we don't care much about the details of our lives.

I deliberately reminded me, but the fat man just didn't care what he said, and the words that resigned himself to fate on the road before the car reached the mountain really annoyed me.

Because the rubber band is tied to the nostrils of the cow, it sacrifices about half a meter in length, because of the weight, so the fat man is the first to go downhill, at least if the rubber band is broken, we can still pull a little, otherwise, when the time comes, we go down, he falls again, it will become a range of weapons of destruction.

The test results are ideal, this rubber band is indeed stronger than ordinary mountaineering rope, and this thing also has a relatively strong contraction, which can greatly reduce the number of carries, presumably a large circle wrapped around the Caucasian waist, about ten or more, can ensure that he can cross at least forty to fifty meters of drop.

The fat man fell first, and we watched at the head of the shaft. I am still afraid that it will break off with a click, although the rubber band is stretched white, but it is still strong. The most terrifying thing is the moment when the fat man reaches the end of the rubber band, because he has maintained the balance of support in the shaft, so as soon as he lets go, the rubber band catapults up in an instant, if it weren't for the old man pulling me, I might really be disfigured in this place.

In the four or five meters that the fat man was supporting his legs in the shaft, the sound of heavy breathing kept coming from below, and I secretly laughed from above, this time it was difficult for him.

Half an hour later, a few of us went down to the bottom of the shaft, and the rubber band also ejected back when the old generation let go for the last time, and the back road was completely broken, unless we could continue to climb up with support from our backs and legs, but for this small and large space, we could only climb to a maximum of five or six meters.

The road below continued on a straight road, with the same slight slope, and in this path there was an unexpectedly large amount of that fine sand, and the depth of the knuckles on the ground was fine sand.

There are only a few very small traces left in the sand, a bit like snake crawling, but we have seen the characteristics of this kind of sand before, because of the density, the recovery speed is very fast, so this series of traces must have been left by the Caucasians.

In addition to these, we also clearly found that there are some blood stains left on the sand on the surface, if it is water, it will definitely be absorbed by the sand, but the blood is directly contaminated on it, so we can still see it.

"Looks like he's not lightly injured." I looked at the trail of blood on the ground and muttered to myself.

The fat man shook his hand at this time The crossbow said: "The arrows have all passed through, he is lucky, he happened to pass through the cracks in the bones, he is not much injured, and this kid is lucky, but he bleed a little more." ”

At this moment, just as the words fell, a gunshot suddenly came out from the depths of the corridor, and in this narrow space, the sound was deafening, almost tearing our eardrums apart.

It's just that after this sound, the old generation and the fat man squatted down almost instantly, but they still didn't forget to keep me down, but after dozens of seconds, we realized that the gunshot was not coming towards us, and it seemed that there were other spaces connected to this in the corridor.

We just looked at the stunned work in the depths of the corridor, and suddenly there were three gunshots in succession, and the interval between these gunshots was less than a second, and it could be determined that it was the completely reformed Mosin Nagant, but wasn't that gun not firing, was it repaired? And why did this person shoot inexplicably, or did he encounter something in the corridor?

I didn't dare to think about it, I was already terrified when I looked at the top of the shaft, let alone the incomparably long dark corridor. After a series of four gunshots, there was no movement, and it was not known whether the Caucasian had overcome what he had encountered, or if he had already been killed by it.

It stands to reason that there are fat people in front of them, and there are old generations in the back, I shouldn't be afraid, one of them holds a crossbow, and the other also holds a double knife, no matter how bad I am, and there are two scabbards for self-defense, I shouldn't have this feeling, but I always feel that I have no bottom in my heart.

The fat man was in front, and I was sandwiched between the two, still in the same formation, and we walked into the depths of the corridor. Walking slowly, the blood stains on the ground have basically disappeared, and after so long, it is time for him to stop himself.

This road is much longer than the one above, the road is just below the one above, look at the structure and find that it is also in the zigzag, which is in line with the safest mechanical structure of the hole, but if it is only a single or not long use, then it is too wasteful, to say that the use of a long time, then this structure will have a big problem, the difference of 15 meters in the middle will become a huge barrier between people or materials, even if it is a few more corners to bring benefits, It is also more convenient than digging a shaft with less effort.

After a long walk, not only did the width and height of the road increase, but even the original slope was basically invisible, and the traces in the sand could not be distinguished, and some of these ravines and ravines merged into its own waves.

I had always thought that this place should be a straight road, but I was suddenly surprised to see something inconsistent at the end of the light in my hand. Actually, it's not something there, it's a spatial change.

As you can see from the flashlight, the corridor in front of us suddenly changed by 360 degrees, and the original corridor directly became a huge space, and we were facing a foggy wall, so I decided that there was at least a hole the size of a tennis court in front of us.

At this time, the old generation's argument is no longer tenable, although theoretically this method is extremely feasible, but in fact, there is no similar precedent in ancient Chinese engineering records and modern records, which is just his conjecture and my association with some miscellaneous conversations. And just grinding marks on granite and grinding out such a large space are still two different things.

We didn't wait, just watched for a while, and then walked straight over, but it was still much slower than the previous march. It's not just the unknown ahead, because at least there is a known danger ahead, the gunfire tells us that the Caucasian already has a strong offensive ability, and the reason for his shooting, we don't yet know whether he was just a false alarm or was attacked by something, it's still unknown

First of all, the empty room we came out of the corridor was very large, almost as long as a basketball court, and at the exit of the corridor were two heavy iron doors, on which were screw caps that could only be held by one hand, according to the fat man, it should be the three-proof door of the fifties and sixties or earlier, and the two sides of the door were superimposed steel plates that reached three centimeters. The hollow door panels are not empty, and they are filled with materials such as quilts to counteract shock and vibration.

The door is open, looking at the weight is naturally not the work of the Caucasians, at least this door as a three-proof door, he is not a human can move, sure enough, we see the air pressure device behind the door, because this design has been in place in the early twentieth century, before the First World War, so we can't estimate who is so, and there is no symbol on the door that can prove anything.

According to the traces, the door has not been moved for at least several decades, the bolt is thick, because there is no moisture here, so there is not too much rust, but there is a layer of reddish-brown oxidation spots on the surface, and the place where the door is connected to the granite is also the same heavy metal, and the sealing strip that insulates the air, these connecting anklets are deep into the granite, and then poured with molten iron.

"It's an underground fortification, it can't be blasted with 50 fires, it's like a permanent building." The fat man touched the dead anklet of cast iron and said, but I don't know why there was no exaggerated echo here.

We left the Sanfang Gate, and when we arrived at the center of this square-like square, we found something even more unbelievable, here is a square, there are stone buildings similar to flower beds in the open space, and benches, but they are also made of local stones, and even in the center of the square, there is a stone building similar to a fountain, of course, the shape of the fountain is only carved in stone.

In front of the square, that is, on the wall opposite the three-proof door, there was nothing, but we immediately found that it was also a three-proof door, but this door was closed. There are also protruding rivets on it, and there are three vertical rows of rotating bolts on the inner wall, which it looks like a person can not make it turn.