Chen Rui can guess.

This was the work of extraterrestrial visitors more than a billion years ago, who came to Earth in "atomic-powered spaceships" and built atomic reactors in this uranium-rich valley to power their activities on Earth with energy released by atomic fission or fusion.

Later, they left Earth and returned to their homeland in an atomic-powered spaceship, a very distant planet, where they left behind this extremely ancient and mysterious atomic reactor.

Perhaps, these reactors were built by the previous generation of Earth civilizations.

Many scholars have pointed out that prehistoric civilizations were destroyed in a large-scale nuclear war.

Whether it's an alien masterpiece or a previous generation of civilization on Earth, both are possible.

Chen Rui planned to go deeper into the cave and continue to explore.

There are few clues.

Millions or even hundreds of millions of years is enough time to erase all traces of prehistoric civilizations or extraterrestrial activities on Earth.

For example, the murals of prehistoric civilizations, some metals, the bones of prehistoric humans, footprints, books and other things will be exposed to the air for millions or even hundreds of millions of years for a long time, and they will be chemically decayed, decomposed, or destroyed due to changes in geological structure.

However, there are some things that will be preserved.

For example, metal products such as gold and silver, the chemical properties of gold and silver are extremely inactive, it is difficult to react with other substances, and theoretically can be stored for an infinite time.

There are also three discs in Chen Rui's hand.

The discs are about the size of a palm, thin, and light, with a tiny hole in the middle of each disc that is carved into the hole that winds from the edge of the disc to the center of the disc.

The disc is silvery-white, held in his hand, Chen Rui touched it with his fingers, it was very smooth, it was not made of metal, nor was it carved from stone, but made of a special material that Chen Rui did not know.

The disc has been exposed to the air for a long time, and after a long time, it has not changed at all, and the dirt on the disc is still very new.

Chen Rui picked up the disc and observed it carefully.

Something different was found on the disc.

The surface of the disc is very smooth, silvery-white, but a black substance appears to be smeared in the small grooves carved into the center of the disc at the edge of the disc.

Chen Rui looked at the disc carefully, and the more he looked at it, the more it looked like something.

It seems a bit like Chen's early 20th century gramophone discs.

Many people can often see such a scene in some video materials of old Shanghai in the early 20th century.

There was a dance party in the room.

On a table in the corner of the room, a large disc is constantly spinning, with curved grooves carved into the surface of the disc, the disc is pressed by a pointed needle, and a loudspeaker plays a beautiful song next to it.

This is Edison's invention of the phonograph.

Rather, this is a disc left behind by aliens or prehistoric civilizations to record sounds, images, numbers, or other signals.

A silvery-white disc made of a special material is the support.

The black material in the trench is a magnetic material or a substance that can store information.

Chen Rui speculated whether it was possible to read the information of aliens or prehistoric civilizations stored on magnetic materials or substances that could store information through a needle through guò or other energy substances.

Chen Rui's guess is very likely.

Chen Rui put the three discs into the pregnant sea pearl space.

Next, Chen Rui found nothing in the cave.

Chen Rui collected some uranium ore and buried this batch of uranium ore in the depths of the underground of the pregnant Haizhu space.

This batch of uranium ore can refine about 18~20 kg of weapons-grade uranium.

These weapons-grade uranium are probably capable of making 5~7 nuclear bombs.

Nature's uranium ore generally contains 0.72% uranium.

Uranium enrichment is necessary for mankind, whether for the peaceful use of nuclear energy or for the development of nuclear weapons.

The application to nuclear power stations is uranium-235 with an abundance of 3%.

If the uranium-235 content exceeds 85%, it is called weapons-grade enriched uranium, which is directly used to make atomic bombs and bombs.

Therefore, Chen Rui's acquisition of this batch of uranium ore does not mean that he can possess nuclear weapons immediately.

Obtaining enriched uranium is a very complex series of processes, from prospecting, mining, beneficiation, leaching, smelting, refining and other processes, and enrichment and separation is the final process, which requires a high level of science and technology.

One kilogram of weapons-grade uranium-235 requires 200 tons of uranium ore, and because of the nuclear weapons involved, uranium enrichment technology is a sensitive technology that is strictly prohibited by the international community from proliferation.

At present, for Chen Rui, it does not mean much to get this batch of uranium ore, but it may be used in the future.

Chen Rui left the valley, called home, and reported his safety.

Chen Rui found a clearing near the stream.

Two marine fish were ingested from the ocean in the space of the pregnant sea pearl.

In the stream, use a dagger to scale, gut and clean the two fish.

Then, collect some dead branches and leaves, and light a fire.

Sharpen the branches, skewer the fish and grill it over the fire.

Wait until the fish is medium-rare, sprinkle with salt and seasoning.

After the fish is cooked, I take out a bottle of red wine from the space, and the red wine, fragrant grilled fish, and start dinner in front of the sunset.

After eating and drinking.

Taking advantage of the still some light, Chen Rui took out the sheepskin map and spread it out on the stone slab.

Based on the terrain, landforms, and markers marked on the parchment map, the route for tomorrow was formulated.

"It will take 2 days to reach the destination marked on the sheepskin map, a mountain lake, if a qiē shun lì."

Putting away the map, Chen Rui entered the pregnant Haizhu space.

In the space of the pregnant sea, it is already night.

A round of moon hung high in the sky, and the white moonlight sprinkled on the ground, making Chen Rui feel a very dreamlike hazy feeling.

There is a bed in the space and there are all kinds of groceries.

After taking a shower, brushing your teeth and washing your face.

Lie in bed and quickly fall asleep.

The next day, Chen Rui got up early, washed up, left the space, and began to continue to advance towards the depths of Daqing Mountain.

On this morning, Chen Rui passed by a bamboo forest.

The bamboo forest covers a large area, there are thousands of acres, the peaks, mountains, and ridges are undulating, and the atmosphere is clear.

The bamboo forest grows common arrow bamboo, the bamboo fragrance is far away, and from a distance, it looks like a beautiful painting of the bamboo forest, splashing ink freehand.

Enjoying the beauty of the bamboo forest made Chen Rui feel refreshed.

Breathe in the fresh air soaked in the smell of bamboo, feel its continuous input into your lungs, cleanse your lungs that are gradually clouded by the city, and feel the precious gifts of nature.

I really want to build a bamboo house and live here for a long time.

It is no wonder that the ancients were able to write the poem 'It is better to eat without meat than to live without bamboo'.

Chen Rui heard movement in the bamboo forest not far away.

Chen Rui walked over and saw a fat bear-like animal lying in front of a hole, squiezing into the hole with his mouth, and slapping the hole with his front paws-

Thanks to the book friend zxyu for rewarding 788 Quge www.biquge.info coins.

Thanks to the noisy ringtones of the book friends, I rewarded 588 Quge www.biquge.info coins.

Thanks to lnyzzy, looking at the moon according to the column, blood heart, near the Arctic Circle and other book friends for their tips.

Thank you so much.

Thank you for your support, you can also collect this book, and book friends who have recommended votes can vote for recommendations.

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