"Start a school!"

The eleven elders said in unison, and then, looking at each other, fell into a long silence.

"If Mr. Liu really decides to do so, then there is no need for Mr. Liu to hide the holy land. My intuition is that Mr. Liu is a man of great ambition and will never be tempted by the contents of the Holy Land. Now it seems that there should be no objection to opening the Holy Land. The black dragon broke the silence first.

"Well, I agree to open the Holy Land."

"I agree."

"I agree."

"I agree."

“――”

Eleven elders raised their right hands one after another, announcing their agreement to open the sacred land of the tribe of gods to Liu Fei.

Everyone decided that after eating, they would take Liu Fei to the mysterious holy place. To Liu Fei's surprise, the so-called holy place was actually a cave behind the wooden house.

The cave is built against the mountain, and at the door, there are some vines, weeds, and boulders that can move, presumably to serve as a camouflage in extraordinary times.

The cave looked inconspicuous, if it weren't for someone to lead it, even if Liu Fei was wise, he wouldn't have thought that this broken cave was actually a holy place for the tribe of gods.

Entering the entrance of the cave for dozens of meters, Liu Fei's thoughts immediately changed, because, in front, a steel gate appeared, although the thickness of the steel gate could not be seen from the outside, but from the height of the steel gate, it can be judged that the thickness of this gate is at least more than one meter, and his intuition told Liu Fei that the folding fan steel gate is very strong.

Elder Heidi used the crutches in his hand to lightly tap dozens of times on the steel gate, these dozens of strokes were not random knocks, they were very rhythmic, faintly, and the slight knocking sound from inside could be heard in response.

The steel gate slowly rose, and to Liu Fei's great surprise, the steel gate was not raised by manpower, but by enabling electricity.

The cave that opens the steel gate suddenly opens up, there is no cave sky, the cave is open and empty, it is dozens of meters high, fixed by the arc-shaped stainless steel support, and the width is about 20 meters. What surprised Liu Fei the most was that in the cave, the lights were bright, and in the depths of the cave, there was the sound of reading loudly.

"This is the sacred place of our tribe of gods." Elder Heidi said proudly.

Liu Fei's face showed a rare look of shock, the project of this cave is extremely huge, although it is brilliantly lit, but at a glance, there is no end in sight.

What surprised Liu Fei even more was that inside the cave, it was like a huge school, with a large number of books lined up on both sides, like a huge underground library, and in the middle, there were some wooden chairs and wooden tables, and some earthlings were sitting studying.

There is no age limit for the people of the earth who are learning, there are old and young, from women and children in their seventies and eighties to children in their seventies and eighties, and they are all very attentive and listen carefully to the lectures of some teachers who look like people.

Liu Fei quickly made a judgment from some of the signs inside the cave.

This is an abandoned military base from the Old Earth era, and the signs show that it is mainly used to store some missiles and military supplies. Obviously, the cave was discovered by the tribe of gods and used to become a sacred place for the tribe of gods.

Elder Heidi's words confirmed Liu Fei's guess.

"Hundreds of years ago, our tribe discovered this cave here, which is 150 kilometers long and almost runs through this mountain range, and since then, our tribe has made this the nucleus of the tribe. When it was first discovered, there were a lot of sealed military supplies, including raincoats and rain boots, some military uniforms, and a lot of munitions. Hey, it's a pity that those materials are not very well preserved, and very few can be used, and through these hundreds of years of consumption, there is not much left of those materials-" Heidi led the way in front, and the group followed behind, introducing Liu Fei as they walked.

"Why is there electricity?" Liu Fei is most curious about the supply of electricity, because electricity means the foundation of scientific and technological development.

"That's a long story—"

Elder Heidi had a look of memory on his face, as if he was immersed in that ancient history.

It's not complicated.

The ancestors of the tribe of the gods originated from another large tribe, and it is impossible to determine what tribe it was. Hundreds of years ago, a large family of that tribe broke away from the original tribe and began to search between the mountains, and according to tribal history, it took the large family a total of seven years to find the cave.

According to the records, the ancestors of the tribe of the gods were purposefully searching, and they seem to know that there was a secret military base here.

After finding the military base, the extended family settled down and embarked on a series of activities, first cleaning the cave and then spending several years reactivating the lighting and ventilation systems in the cave.

Because of the support of a large number of military materials, the tribe of gods quickly grew.

During the rise of the tribe of gods, the ancestors of the tribe of gods formulated a series of sustainable development systems, including the election system and the cultural and educational system of the tribe.

The education system is well established, not only by giving the tribe a fixed number of teachers, but also by making it mandatory for everyone in the tribe to have a certain level of education.

This kind of education is not short-term, but a long-term act, and every member of the tribe has to spare two months of study for twelve months a year.

As for teenagers like Le Dewang, the study time is as long as half a year.

In this kind of education, some outstanding and amazingly gifted students are left behind to work as researchers and teachers. In this cave, there are as many as 500 people who have been engaged in research work for a long time, and they spend almost all their time on research work, except for a small amount of labor to exercise their bodies.

In addition to research, it is also their job to repair some ancient earth age machinery and equipment, such as repairing telephones, generators and some machinery. Of course, there will be people who will specialize in maintaining and repairing those old books.

Now, Liu Fei completely understands why the people of the tribe of gods have such rich cultural knowledge.

It is no wonder that the tribe of the gods calls this a holy place, for a primitive tribe, this cave is tantamount to an inexhaustible treasure trove, the knowledge here has covered tens of thousands of years of history on the earth, as long as this cave is kept running, then, the flame of hope of the tribe of gods will not be extinguished.

At the same time, Liu Fei also understood why the tribe of gods attached so much importance to the secrets of the Holy Land, for interstellar tomb robbers, this place was also a place to include, if the things here were sold in the six star fields, it would definitely be an amazing fortune.

From the conversation, I learned that in the heyday of this cave, it was able to produce some guns and complex mechanical engines, but unfortunately, as time went by, the resources found around became less and less, and the productivity of the gods tribe returned to the barbarian era.

――

Liu Fei can understand the helplessness.

Without coal, without metals, without some chemical raw materials and high-tech instruments, it would be a dream to develop a sustainable industrial system. Not to mention those high-tech machinery, even the simplest guns need to be forged at high temperatures, which is a very difficult industrial manufacturing for earthlings.

From the introduction of the Great Elder Heidi, Liu Fei also learned that through the carpet search, the tribe of gods had found several large oil depots buried underground, but in these hundreds of years of consumption, there is not much oil left, according to the current consumption calculation, at most ten years, the holy land of the tribe of gods will fall into darkness, and at that time, only pine oil torches can be used instead of lighting to study, and some research work will be completely stopped.

In fact, when Liu Fei found Le Dewang, Le Dewang went to that city to try his luck, hoping to find a warehouse where oil was stored.

In fact, most of the oil depots previously discovered by the tribe of the gods were found by chance.

Of course, it's not entirely a matter of chance, because human oil depots are generally traceable, as long as you find some ancient industrial bases and oil storage bases, you can find a place to store oil, the only question is whether there is any remaining oil in those places.

In addition to oil, metal is also a very important strategic material, and the tribe of the gods, in addition to hunting and growing crops, spends most of their time collecting metal.

Although the metal mines on the earth have been extinct, there are still a lot of metals left, and some buildings have to use a lot of metal, but the problem is that no one can get out the metal mixed in the cement, and the metal of some large industrial bases cannot be cut and taken away.

――

After listening to the introduction of a group of elders, even the hard-hearted Liu Fei was sad for a while, and the difficulty of developing an industrial system on a planet where ore energy was exhausted can be imagined.

In Liu Fei's eyes, the earth is full of energy, and towering trees and sunlight can be converted into energy, but for earthlings, it is impossible to complete the transformation that seems extremely simple in the six star fields.

From the era of the Industrial Revolution to the use of clean energy, human beings have spent thousands of years to exhaust the energy of the ancient earth. In this kind of consumption that is almost like killing chickens and eggs, the ancient earth humans have established a complete industrial system, and clean energy is gradually established on the original industrial system, and now, it is obviously unrealistic to let the earthlings in the barbarian era reach the current scientific and technological level of the six star fields in one fell swoop.

It is conceivable that in time, the earthlings may develop a technological civilization completely different from the six star fields, but it takes time, and in the long river of time, it is accompanied by war and killing.

Whether it is knowledge or wealth, or the power of science and technology, it takes time to accumulate, and there is no doubt that this accumulation process is a long and painful history of blood and tears.

It is a long and painful process for any species, including aliens with perfect bodies, to evolve into humans.

And the only way to change this process is to use external forces, just like that very powerful multicolored alien evolved by fighting humans, Liu Xiaofei and the tadpole using Liu Fei's power.