Shen Chuan's helmet is an aerospace-grade material.

Not only can you be completely isolated from the outside world, but you can also maintain voice and video calls.

In the helmet, there are also a large number of sensors.

These sensors will send the video screen, audio screen, and the surrounding infrared situation, as well as the elemental components, to a computer on it.

Zhang Wei is responsible for leading the technicians, guarding the computer and everyone's screen.

As long as there is a person whose situation is not right, or if there is a problem in the situation below, Zhang Wei will launch a rescue plan to ensure that no one will have an accident below.

After checking all aspects and making sure that there is no problem.

Zhou Long's men stood in the first echelon and entered the black hole.

Shen Chuan and several people buckled the safety ropes respectively and followed closely behind.

A military-grade flashlight illuminates the entire black hole transparently.

It turns out that this black hole is actually a ladder.

From the northeast area where the gate is located, it winds counterclockwise.

It's like the shape of a mosquito coil.

Of course, this was just the feeling of Shen Chuan more than a hundred meters after walking into the entrance of the cave.

What the scene will be further down, no one knows.

"Zhang Wei, how is the sensor display over there?"

"Mr. Shen, the sonic vibration sensor shows that the passage you are in extends a few kilometers down. At your pace, it will take more than an hour to go on. ”

"And the sensors show that there's a big hole in the third of the spiral staircase, and you can walk for about ten minutes to get there. There are several similar holes below, but it's not clear what exactly is inside! ”

After getting Zhang Wei's answer, Shen Chuan continued: "Zhou Long, it is currently determined that the ladder should be the safest, and depending on the situation, I will choose not to go in or not!" ”

"Okay, I'll go ahead and see the situation first!"

Zhou Long said, untying the safety rope tied to his body.

Then, along the stairs, I walked quickly to the front.

The people in the back took Zhou Long's place and tied safety ropes to each other.

And Zhou Long was also at the front, fastening the safety rope.

Although this process may seem tedious, it can be played out in the event of an accident, such as a sudden collapse of the road underfoot.

Although, this staircase is a hole that spirals downward.

It looks like it was carved out of the mountain, and there is no possibility of collapse.

But no one knows whether the bottom of the stairs is hollow or solid.

Therefore, the most important thing is to tie the safety rope and protect each other's safety.

Zhou Long walked to the front and back.

Led by him, the speed of the whole team was much faster.

"It's on the right hand side of where Brother Long is standing, that's what I mean by hollow!"

Hearing Zhang Wei's voice, the team stopped.

Shen Chuan looked at his right.

Unfortunately, only the granite cave walls can be seen.

Zhou Long's situation is the same.

In front of me is a piece of granite, and there is no space at all as Zhang Wei said.

However, just because you can't see it doesn't mean you don't.

Picking up the shovel, Zhou Long walked to the cave wall and knocked it with the shovel.

The crisp echo of the bell told several people about the material of the cave wall.

Zhou Long frowned and asked, "This is not hollow, where is the hollow space you are talking about?" ”

Shen Chuan also had some doubts.

It stands to reason that this machine can't deceive.

Then he turned his face and looked in the direction of the cave wall.

They came down from the northeast corner and went down counterclockwise.

Northeast corner, counterclockwise down.

Well, their right-hand side, which is the outer side of the mountain.

Depending on their pace, it took about half an hour.

At this inclination, it is about two or three hundred meters away from the surface of the mountain.

In terms of scale, there is indeed plenty of room for the void.

At this moment, Zhang Wei's voice came again.

"Brother Long, I took a closer look at the machine, and it showed that you and Kongdong are separated by a very, very thin line, thinner than a hair, if you don't look carefully, I really haven't seen it!"

Thinner than a human hair?

But Zhou Long obviously knocked it, and the sound didn't look like a hollow sound.

Zhou Long scratched his helmet.

"What's going on? Could it be that the sound is different in this cave? It's obviously solid! ”

Zhou Long was puzzled.

Even if there is a turn in the cave, it will not turn the muffled echo into a crisp sound!

Just when Zhou Long was puzzled, Shen Chuan was about to curse angrily.

resisted the urge to scold and said, "Look at the screen, is the hole you see as big as your slap?" ”

As soon as he said this, Zhang Wei took a closer look, and immediately came with a voice of surprise.

"Mr. Shen, don't say it, it's really true!"

One of them was counted as one, and they all wanted to press Zhang Wei to the ground and rub it repeatedly.

Therefore, in the future, you must recruit those who have read books.

"Zhang Wei, don't look at it for the time being, let the person next to you tell us!"

"I'm sorry Mr. Shen, I'm not very good at this thing!"

"Well, you let the people who test the data say, they make it clear!"

After Shen Chuan's voice fell, Zhang Wei hurriedly handed the microphone to the person next to him who was testing the data.

"Mr. Shen, according to the same proportions, the hollow space on your right has a capacity of about two hundred square meters, and some positions are regular graphics. So, it's unlikely to be a naturally occurring cave! ”

This professional person speaks much more professionally than Zhang Wei.

Shen Chuan nodded slightly and said, "Well, then you can help me see how far we are from that hollow space!" ”

"Mr. Shen, I saw it, the line that Brother Zhang said is about two meters thick!"

Two meters?

Shen Chuan swallowed a mouthful of saliva.

If you dig alone, you don't know if you have to dig until the Year of the Monkey.

Fortunately, Shen Chuan was prepared.

Without waiting for him to give an order, the five people standing at the back of the line came over with boxes.

Just like a procession, the person in charge of the baggage is at the back of the procession.

And the baggage soldiers in their team are the five people behind them.

These five people carried various types of cutting machines and punching machines.

The division of labor is cooperative, two people are responsible for cutting and punching, and two people are responsible for cooling and spraying water.

In a matter of minutes, a large chunk of the cave wall was dug down.

At this rate, it doesn't take half an hour to completely dig through the cave wall.

During this time, it is just the right time to give a few people a break to replenish.

Shen Chuan took off the helmet after receiving a prompt from the inspectors to confirm that the air content was fine.

Then, Xiao Yun carried a cartoon backpack and ran over.

I took the water from my bag and handed it over.

Today, Xiaoyun is not only responsible for Shen Chuan's safety, but also responsible for everyone's drinking water.

Don't look at this backpack is not big, the capacity inside is not small.

Xiao Yun carried a total of nearly ten liters of water, enough for several of them to drink water for several days.