The foreman quickly found ropes, which they could still find, although not always available, and sometimes needed to go up the mountain.

"Are there any blowers?" Ye Nan asked.

Many people have some simple experiences, but now, they have ignored them, and Ye Nan doesn't want to put himself in a dangerous pit, so the first thing he has to do is to blow some gas into it.

"Yes, but it's not very big."

"Bring it." Ye Nan said, and several people began to prepare, according to Ye Nan's words, it would take at least half an hour to transport gas into it before they could go down.

At this interval, Mo Xinqiang also came over to take a look.

"It's dark down there, I can't see how deep it is, but it's deep enough." Mo Xinqiang turned his head to look at Ye Nan, he didn't want Ye Nan to take risks.

"Is it dangerous?" Lin Ruyan looked at Ye Nan and asked seriously.

"As I do, there is no danger."

Ye Nan smiled faintly, the reason why he had such confidence was entirely because he had the support of mana, even if there was danger, it would not threaten him, so he was not worried.

And others don't know, especially Lin Ruyan, she is a little worried about Ye Nan now.

"There are some dangerous places where professionals are not safe, why don't we ask a professional team to go down and have a look?" Lin Ruyan gave his own advice, although he heard Ye Nan say that there was no danger, but he knew that there were still many dangers.

After all, no one knows what happens below.

"Don't worry about this, I have a rope tied to my body, if there is anything pleased, I will call you, and when the time comes, you can just pull me up." Ye Nan was also very happy, Lin Ruyan could be anxious for him, which proved that he cared about himself.

A woman who cares about herself just likes herself, and Ye Nan is not an elm pimple.

"Why don't you go?" Mo Xinqiang is also definitely in danger.

"The school is still waiting to be built, and besides, I'm completely prepared and it's going to be fine."

Ye Nan smiled faintly, although he said this, they were still a little worried.

When Ye Nan saw that they had brought something, he knew that they were blowing it inside.

More than a dozen workers were constantly busy, and after half an hour, Ye Nan asked people to listen to the fan, then took out the match, lit it, and threw it down directly, when the match was in the end, the match was still burning.

"Everyone is relieved, there is enough oxygen in it." Ye Nan said, smiling faintly at Lin Ruyan, this smile could be regarded as a comfort to him.

However, Lin Ruyan was still very worried, "Or don't go." ”

Ye Nan smiled faintly, "Don't worry, I'll come up in a while, I'll just see what's inside." ”

Ye Nan has already decided, and no one else can object, what they can do is to pull him up the moment Ye Nan shouts, only in this way can his safety be guaranteed.

Ye Nan put the rope on his shoulder, and several people slowly put him down, of course, in addition to this rope, there is also a rope, which has been tied, just under his feet, Ye Nan grabbed this rope and went down slowly.

At the time of the day, it was pitch black all around, and this place, unlike the average cave, was too dark here. Ye Nan turned on the flashlight and looked around.

It seems that this is not a man-made cave, but a naturally formed cave.

After Ye Nan went deep into the ground, he signaled to them that he had reached the bottom of the well.

There are crystals underneath this, like quartz, so it looks like Starlight nodded, and as for the other stones, they are not ordinary stones, as if they can absorb light, and this place is very cool, completely different from the outside.

Ye Nan didn't care about these and continued to move forward.

This place is not small, and the direction is towards the middle of the mountain, here is a naturally formed cave, I don't know how many years, no one has ever visited.

If Ye Nan hadn't removed the layer of stone above, he wouldn't have found this place.

It used to be a teacher's office, but now, it seems that no house can be built.

This place can be used as a library, but the ventilation problem is a little difficult, there must be a special ventilation system, otherwise, this place can not be here for a long time, of course, there must be an elevator up and down.

After Ye Nan checked it, he made a plan in his heart, this place will be used as a library.

I don't know if the stones here are solid, Ye Nan saw that there were a lot of mosses and some other plants, and he used ten points of mana to improve these plants and strengthen the surrounding rocks.

Of course, even if a library is to be built here, a room must be built with stones again, and Ye Nan did this just to ensure the safety of this place.

Of course, the problem of drainage also needs to be considered.

The terrain of this place is a bit high, and the problem of drainage is actually very simple, as long as a drainage hole is opened.

After Ye Nan finished the inspection, he asked them to pull himself up.

"Are you alright?" Lin Ruyan came over and helped Ye Nan fix her hair, because some places in the cave were narrow, so Ye Nan still had some moss on his body.

"It's okay, it's a naturally formed cave inside." Ye Nan explained. Then looked at the place.

"The cave is not a place to hide treasures." Mo Xinqiang asked curiously.

"Where are there so many treasures?" Ye Nan smiled faintly.

"I've seen it just now, and this place is still good as a library, but it needs to be replanned." Ye Nan said what he thought.

"You can really think of it, but this building is still good." Saiqiya nodded, he was still very sure of Ye Nan's construction.

"If you want to build a library in this kind of library, you have to do two things, the first is to have the air to press in, and the second is to drain the water." It's hard to say, and the ropes on my body are untied.

"This second drainage is not a problem, as long as a drainage hole is opened, the first pressure air has to be organic, and it has to be constantly pressed, and there must be electricity."

Ye Nan said himself and his thoughts, and several people nodded again and again, they didn't expect that Ye Nan actually had such thoughts.

"It's better to press the elevator." Saiqi Yajian yì to.

There must be an elevator.

"I already know the following situation, take a large piece of paper, do what I say, and I will pay you extra wages." Ye Nan said to the foreman.

The foreman nodded, and asked people to take out professional drawings, Ye Nan roughly drew the following situation, and then drew his simple idea, the system of air pressure is on the ground, however, those pipes and elevators are all from here, as for drainage, it is not a problem to drill a drainage hole.

"In terms of electricity, we have to have solar panels, and of course, we have to add our power grid, so we can't lose power here." Ye Nan turned his head and said to Saiqiya.

"That's not a problem."

"Then do it according to this drawing, do you have any experience in deep well operations?"

Ye Nan asked the foreman, because this was a somewhat dangerous job.

"You can rest assured, our Lao Zhou is an expert in this area, but the construction period may have to be extended, and the cost will increase a lot."

Ye Nan nodded, "This is not a problem for me." ”

Several people looked at Ye Nan with admiration, they really didn't expect that Ye Nan would understand the righteousness so well.

(l~1`x*>+``+