The spaceship landed on the black planet, and Lu Yu realized that there was nothing on this planet on the surface.

The scorched earth was as if it had been burned by fire.

Grabbing a handful of soil and looking at it carefully, Lu Yu found that these soils were actually rich in a precious iron ore.

This kind of thing, if you look at it with a microscopic view, you can see some crystals, each black, in fact, is a black crystal, but too much mixed together, it is like sand, tightly attached to the ground, more thick, so there is this black planet.

Lu Yu asked, "You ...... Any idea what this is?"

The four of them were busy on the side, and when they heard Lu Yu ask, they said: "This is Huanni Sand, one of the best metals for forging blades, this was once a mineral deposit, because there is a mine, it happens to be used as our base." ”

_S permanent i free o fee / n look v ◇ small i said; O

Lu Yu said: "Then these Huanni Sands are not needed here, aren't you short of blades?"

"Blades, for the people here, blades don't have much value, array ...... Huanni Sand is one of the indispensable raw materials for refining array plates, but in order to maintain the integrity and secrecy of the planet, we can only develop it from within. ”

"Oh...... Also, this consideration is correct, rabbits don't eat the grass next to the nest. ”

Rabbits don't eat the grass next to the nest, the rabbit's nest should be secret, if the grass next to the nest is eaten, it will lose the privacy of its burrow, and it will be caught by natural enemies. When rabbits are smart, there are some places that are beyond people's imagination, such as secrets, such as ...... Patience.

Lu Yu had seen it before, on a flat ground, dust, and grass, and he couldn't see any difference at all.

Then a rabbit came, holding a little food, put it aside, turned around, and dug desperately with its hind legs, and dug a pit out of the originally flat land for a while, the soil inside was unimaginably soft, and there were no stones, digging and digging, just when people were curious about when the rabbit became a dog, why did it also have the habit of digging holes and burying food......

Everyone was surprised to find that under the excavation, a small hole appeared in the ground! In the small hole, three small heads immediately appeared, obviously a little rabbit that had just been born for a long time, and anxiously made it up.

The rabbit fed them the food next to it.

And then...... I buried the soil around me that was more than I had just dug up.

Little by little, back and forth, evenly, then add a layer of floating soil on top, the kind that looks gray and dry, and a layer of sand and gravel to make it look like normal land, and finally, put some grass on top.

In this way, people just blink their eyes and there is a sense that there is nothing unusual here...... feelings.

The whole process took nearly an hour, and the feeding process was actually only a minute.

The patience is amazing.

Especially this hidden technology, which makes those old hunters sigh to themselves.

At that time, someone sighed and said: "If there were no hounds, we would not have been able to find the rabbit's nest, and under normal circumstances, we would just put a trap on the path that the rabbit must pass, and wait for it to get into it by itself, and the rabbit will follow the fur and get in, and the hair will be stuck, and it will be impossible to pull it out." ”

Lu Yu thought of those things, and then looked at this planet that didn't seem to be abnormal, and suddenly said with a wry smile: "There is a mine hole under here? If it is so well hidden, it is really a rabbit hole." ”

"Huh?"

The four of them immediately stopped and turned their heads to look at Lu Yu with a look of surprise.

Lu Yu was taken aback and asked, "What's the matter?" ”

They said, "You...... How do you know this is a rabbit hole? It's a top secret, and only a few people on the front line know about it......"

Lu Yu was stunned for a moment, and smiled bitterly in his heart, about the matter of naming, people all over the world actually have no creativity......

Then he raised his eyebrows and said in a very stinky manner: "Well, you don't look at who I'm coming with, and my identity as ...... I guess you know that, right?"

The four of them looked at each other, then nodded, and said no more.

As they were busy for a while, there was a sound of Titicaca, and a large hole finally appeared in the ground.

The sand on the surface is floating in the air, and it looks very interesting.

There's a cave down there, and that doesn't make it a little bit of sand flow into the cave.

"Alright, let's go down. ”

Really went on.

Not really, but the planning of this cave is really good.

There are three inner and outer three layers, and each individual cave has its own unique livelihood.

Lu Yu said curiously: "It's such a big place, there should be a lot of people in it, right? If it's full, I'm afraid there will be hundreds of thousands of people, and it's really an underground city." ”

The four of them looked at each other again, and since Lu Yu said the name of the rabbit hole, everyone didn't seem to have that kind of defense against him, so they said: "If it's full, I'm afraid there will really be so many people, but there are really not many people here now." ”

"Not much? How many are there?"

"Thirty thousand. ”

"Three...... Thirty thousand?!"

"Well, there are 22,000 of them who are just family members, and there are less than 8,000 people who are responsible for everything in it, and who really work and make array plates. Among them, there are less than 100 people with excellent talent and advanced skills, to put it simply...... There are only 100 people who can independently complete the array and complete the final assembly work. ”

"A hundred?" Lu Yu frowned and said, "That...... It's really not too much. ”

The level of craftsmanship in this world is actually very high, in terms of science, it is higher than Lu Yu's previous life, and in terms of cultivation, it is naturally higher than Xiantian.

To put it simply, no matter what aspect it takes, this world is far superior to the Short Stick World and the Three Realms World.

So some of the ideas that this world is also extremely advanced, such as work.

It's definitely an assembly line, where each person is responsible for a piece, and after the precise work, all the parts are put together at the end.

Lu Yu originally thought that this array was ...... How could it be made by a single person, more similar to carving, but now that he heard these words, he knew that it was definitely not the case.

The four of them went straight all the way, passing a few people in the process, but everyone just glanced at each other, and then nodded, both in terms of expression and attitude, they all seemed a little indifferent.

Moreover, they were in a hurry, as if they were in a hurry.

Thinking that these four people haven't slept for several years, it's understandable that the attitude of these people is racing against time.

This...... Maybe it's the best attitude to work.

All the way to the lowest level, there was a much larger room, and there was a guard in front of the door.

"People, we brought. The four of them stepped forward to say a word, and also gave a word, then turned their heads to look at Lu Yu, just nodded, and left directly.

Such a simple handover, Lu Yu really rarely encounters it, it can be said that it is ...... It seems that for the sake of efficiency, many things in this are simplified.

Lu Yu was led in by the doorman again.

In the process of walking, Lu Yu smiled bitterly, and then said, "I...... If you should take it back, this isn't a rabbit hole, it's ...... It's an anthill......"