This is a piece of basalt about 10 square meters.

At least 10,000 catties of weight, to be honest, it is impossible to lift it up with just a few iron shovels.

But it must be said that the wisdom of the people is great, and the warriors just pry open a hole and immediately use a wedge to get stuck into the gap between the basalt and the mouth of the cave.

Immediately afterwards, another warrior took the steel pipe and the inverted chain, and erected the steel pipe on the basalt rock to form the most stable triangular shape.

Then with an inverted chain and a rope, he shoved it through the edge of the basalt, pried open the other end, and passed the chain through from that end.

A total of four directions were pried open, and then the chain was tied from under the basalt into a fixed shape in the shape of a cross.

Using the jack-like principle of the inverted chain, just two warriors pulled the inverted chain out of their horses, and easily pulled out the huge basalt by the roots.

Immediately, another warrior added iron chains on top of the suspended basalt, and more than a dozen warriors held the chains and shouted trumpets to pull them aside.

"One, two, three, hey!"

There was a loud bang.

Pull the basalt down, and at the same time put down the steel pipe with the inverted chain. In this way, the whole basalt was completely thrown aside.

But I saw that this basalt was at least half a meter thick, more than a dozen square meters in size, and it was simply a large manhole cover.

Ren Li Xun thought about it, and he couldn't figure out who covered it at all.

The serpent has the strength, but the problem is that it has no hands or feet.

It's covered with dirt, so it's clear that someone is helping.

But when I thought that after it slipped out of the water hole, it was able to cover the mouth of the water hole with mud and sand, making the illusion of the bottom of the lake, and my heart was relieved.

Perhaps, it really has a special means of covering up the back road, which is a way that is difficult for normal thinking to imagine.

The manhole cover was lifted to the side, revealing the swarthy sneering cavern below.

The old cow climbed to the mouth of the cave and observed for a moment, and exclaimed, "Man-made traces." ”

"What?"

"Could it be that this is made by the people of Xujiashan Village?"

"It's impossible, digging out such a dungeon is countless times more difficult than building a cemetery. ”

“……”

Then, the old cow frowned again and said, "No, this is a natural cave, and the back has been built by man. ”

He pointed to the upper wall of the cave entrance and said: "The top and the left and right sides of this one are smooth, with few protrusions, which is the characteristic of the karst landform, which is washed out by the water, so it is particularly smooth." But below, there is a hand-carved staircase. Oops, this staircase should not have been carved out by the people of Xujiashan Village. ”

Expert Xu wondered: "This entire dungeon is related to Xujiashan Village, this staircase was not made by them, could it be made by ghosts?"

Lao Niu was stunned, looked at the crowd and waited, and said, "It's not good, it's really a ghost." ”

When everyone heard this, they looked around at the entire ditch village, and they felt a little hairy for no reason.

Lao Xu urged: "What is the secret? Say it quickly, what the hell is not a ghost." ”

Professor Niu lay on the ground, touched the rough stone staircase with his hand, and said: "The degree of smoothness, the degree of wear, and the scratches of the years on it, from these three aspects alone, this stone staircase is at least five hundred years old. ”

"What's that?"

The crowd was shocked.

Five hundred years of history?

According to all reliable information, the big snake has only been in this mountain for less than ten years, and according to the investigation of Xujiashan Village, it is found that Xujiashan Village has only taken root here for only 200 years.

Where did it come from for 500 years?

Li Xun was stunned for a moment, and suddenly said, "If I'm not mistaken, this stone ladder should have been carved out by the people of Ditch Village, right?"

Professor Niu smiled, "You and I went together." ”

Li Xun nodded and asked, "Xu Qianyun, you can enter the intranet and check if there is any county chronicle in the archives that records Gouqu Village." On the surface, it is said that Xujiashan Village is mysterious, but I think that in fact, Gouqu Village is even more mysterious. ”

A group of people gathered around the entrance of the cave and began to rest, while Xu Qianyun used a portable laptop to quickly start operating, entering the archives, and accessing the local county records.

Before they had an eyebrow, they didn't dare to enter this cave rashly and casually, and they had to be ready to enter it.

No one will know what kind of environment this cave is in, whether it is suitable for human life, whether it contains toxic gases, these are all blind.

So everyone rested, and when Xu Qianyun investigated the archives, some experts began to use instruments to probe into the hole to analyze the data.

I have to say that Lao Niu is an all-rounder, not an orthodox biology expert, but a great interdisciplinary old man.

Almost all the instruments are operated by him, and he can understand almost all the instruments. Those English letters and values that make people dizzy when they look at it, it looks like a book from heaven to outsiders, but Lao Niu seems to be able to see stories from those symbols.

I saw the old cow reach into the cave with a detection radar that I don't know what it was called, and the radar made a strange chirp, and then a topographic map appeared on the computer.

This really stunned Li Xun, and he felt that he was a turtle for the first time.

The craftsmanship inherited from our ancestors is being replaced by these high-tech technologies.

Exploring the water hole, people have sonar detectors. The overall structure under the soil exploration layer, people have ground penetrating radar. Exploring the terrain of this cave, people still have such unknown things.

It is said that it was invented based on the principle of bats, which send an ultrasonic signal into the cave, and the signal will be reflected when it encounters a stone wall, and then the reflected signal will be received by the radar to form a topographic map.

Lao Niu looked at the topographic map on the computer, gasped, and closed the computer: "Yes, it's better not to explore." ”

Li Xun asked, "What's wrong?"

"The cave is a kilometer long and extends to a position of four hundred meters below the surface. Then there are caves with twists and turns, caves and caves, and labyrinths and labyrinths. The route rises in geometric multiples, constantly scattering, and new caves are constantly appearing. It's that you only have one way to walk now, but when you walk, it becomes two, you choose one to go in, and when you walk, it becomes three. ”

Lao Niu sighed: "This is the karst landform, it's too complicated." There are at least dozens of different roads, too scattered. The signal from the radar was consumed by the scattered caverns as soon as they entered. I wondered if I could find a map, but it was too complicated, and with this radar, we would get lost. I heard that you have a good nose, it's up to you. ”

Li Xunhe laughed, and felt a little more comfortable in his heart, that is really the ancestral craftsmanship is better.

Then, the air quality data was also analyzed, and the results showed that it was non-toxic.