Through this gate, the wall of the corridor behind is also covered with crisscross pipes, precision gears, overlapping mechanical structure, and even "hiss hiss hiss" spraying steam. It feels like entering the viscera of a mechanical giant.

Walking through the "intestines" of the mechanical giant for a long time, the gate below is actually made of crystal. You can also see countless sealed lightning slowly flowing between the crystals, just like a poisonous snake guarding a treasure.

However, under the order of the golden mysterious man, the lightning snakes all retreated one by one, and the crystal gate gradually became transparent and disappeared.

Further down, they passed a gate made of pure plants, a gate in semi-solid state surrounded by fog, and several gates with different styles and complicated refining technology, which even Li Yao had never heard of.

Each gate has its own way of opening, some of which are far beyond the limits of human physiology and imagination.

But the golden mysterious man seems to have walked through it hundreds of times. He is familiar with every step without any hesitation and opens all the gates like flowing water.

Every time you go through a gate and go 100 meters underground, it's like entering a whole new world.

In the corridor behind the crystal gate, there are clusters of gorgeous crystals, which are blooming with dazzling brilliance. After thousands of years, they have not been completely annihilated.

Behind the plant gate is like a withered jungle, with vines and shrubs drying up and becoming human like silhouettes.

Behind the misty gate, there are traces like frozen smoke, just like the explorers of a long time ago. The flesh and blood have already disappeared, but the spirit has been preserved in an incredible way, guiding the direction of the latecomers.

Li Yao even saw countless things on the four walls of a corridor, which were similar to biological remains.

These "things" are like gorillas with four arms and a huge strange eye on their forehead, but they show the luster and texture of bronze. After hundreds of millions of years of erosion, they gradually integrate with the corridor, and become extremely distorted murals, even leaving only small black holes - their eyes.

This incredible picture made Li Yao shiver coldly.

He turned his mind and gradually realized that this should be the laboratory, research institute or forward base left by countless civilizations trying to explore Archean relics in the past billions of years.

——When the former ruler of Pangu universe, those ancient carbon based intelligent life discovered the existence of Archean relics, nature, like Pangu civilization and human civilization, gathered the most cutting-edge talents and technology, built the most grand laboratory and forward base here, trying to uncover the mystery of Archean.

However, some mysterious power has wiped out dozens or hundreds of ancient carbon based intelligent life civilizations and even traces of their existence. Only the ruins deep in the earth tell of their past glory.

Hundreds of thousands of years or millions of years later, the new generation of carbon based intelligent life has developed a developed civilization, found Archean relics, built its own laboratory and forward base on the ruins of the previous civilization, and then was destroyed again.

Today, hundreds of millions of years later, the underground of the city of silver is covered with dozens of ruins, becoming a time labyrinth hundreds of times larger and more complex than the world on the ground.

If today, the city of silver is destroyed by the ferocious beast tide, and the ferocious beast tide is destroyed by the terrible power released by the "Tongtian tower", then in a few hundred thousand years, the ruins of the city of silver will also be annihilated in the erosion of time and become the top layer of ruins.

"Hundreds of generations of civilization have stopped here, as if this is the end of civilization!"

Lee was deeply shocked.

He did not believe that when a civilization came here, there would be no trace of the annihilation of more than a dozen or even dozens of civilizations.

The database of Fuxi, the other half of Fuxi, clearly records the existence of at least dozens of civilizations.

Knowing the danger of Archean relics, these civilizations are still flying moths to the fire. Why?

Li Yao's mind turned and he immediately laughed bitterly. He was too stupid to laugh at himself.

"Curiosity" and "thirst for knowledge" are indispensable conditions for the achievement of a civilization. The reason why "man" is "man" is that he has endless thirst for "unknown" and "future".

No civilization can hold such a large ancient relic and remain indifferent.

There are always careerists, adventurers, and lunatics - good or evil, these people are the first driving force of civilization.

What's more, the higher the degree of development of a civilization, the more serious the tendency of self destruction.

Even without the existence of Archean relics, can't a civilization develop a "cosmic magic weapon" that can destroy itself?

A civilization that cannot destroy itself is hardly worthy of being called civilization.

Perhaps the so-called civilization is such a crazy "cosmic virus"?

Li Yao pondered.

At the beginning, he also tried to communicate with the golden mysterious man, including shouting and teleportation, but the other side always turned a deaf ear and ran all the way in front of him.

Li Yao knew that the other party was guiding himself, and he could only restrain his anxiety and follow closely, scanning every detail around him at the same time.

The last gate made a thunderous sound and drew back into the surrounding rock wall. In front of it was no longer a narrow corridor or collapsed ruins, but a huge cave with a diameter of more than 500 meters.

There is a light fog around. The fog is like a spirit with life. It will condense with Li Yao's eyes moving. When the light fog condenses, the brightness will instantly increase a few points, so that Li Yao can see everything around him clearly.

It's like a museum of... Prehistoric civilization.

In the misty light, Li Yao first saw the wreckage of a "star steed", which was carefully decomposed into hundreds of units. Even the most delicate core mechanical structure was disassembled, like a mechanical surgery.

After a long observation, Li Yao came to the conclusion that these crisscross apertures, such as neural networks, are indeed "nerves" in a sense, transmitting and processing information through the transmission, refraction and diffraction of photoelectric signals in the aperture, It's highly efficient.

Li Yao doesn't know whether this structure is the creation of ancient civilization or the remains of ancient civilization. Although it doesn't look like carbon based intelligent life, it may also be the crystallization of some coral like marine life after death.

There are many strange things like the crystal pyramid structure in the fog, but without Li Yao's careful examination, the golden mysterious man went straight to the depth of the fog.

The fog dispersed, revealing several huge human figures.

Li Yao's pupils suddenly contracted - he found several Pangu people.

After a close look, we found that these Pangu people were all motionless, immersed in the giant reinforced Crystal Tower, surrounded by preservatives.

These Pangu people died long ago and were made into "specimens".

No, it's not just the Pangu people. There are hundreds of crystal towers in the fog. In each cluster of crystals, there are the remains of a vast carbon based intelligent life. Not only the Pangu people with gray skin and wrinkled heads, but also the Nuwa people with human heads and snakes, the Kuafu people, the Houyi people with black beetles, Evolved from sponge like organisms, such as transparent gel workers, there are collections of thirteen kinds of dead bodies, and many skeletons are cut precisely, stripped of the skin and muscles, leaving only blood vessels and neural networks.

In this way, the host here seems to have a profound understanding of the physiological structure of Honghuang wisdom race.

There are also fierce beasts. In front of the crystal tower where the remains of the wild races are stored, there are more than a dozen operating tables reconstructed from maintenance platforms. The bloody remains of more than a dozen fierce beasts are placed on them. On the largest "operating table", there is even a brain bag of Tyrannosaurus Rex. The skull has been cut in a circle, and the whole body has been removed, revealing a lump of deformed and mutated brain, Sealed by some light green gel, it does not wilt and rot.

There are also hundreds of crystal wires inserted into the brain of Tyrannosaurus Rex, leading to several super crystal brains in the era of Xinghai Empire nearby. Crystal brain emits faint fluorescence and is carrying out ultra-high speed operation. In a three-dimensional light screen, the virtual brain of Tyrannosaurus Rex is created.

However, with the instructions from jingnao, this Tyrannosaurus Rex with only its head left didn't even die, occasionally blinking.

It seems that the master here has a very accurate understanding of the brain structure of the Tyrannosaurus Rex, as well as its combat mode and thinking habits, so that he can jump to its head and kill it with one hand!

Li Yao is becoming more and more curious about the identity of the golden mysterious man. In the Museum of prehistoric civilization, there are so many remains of "star cavalry" and "Tyrannosaurus Rex", including the remains of hundreds of desolate intelligent lives - in the vast majority of human cognition, this is a "specimen of God"!

Who on earth is he?

An obvious answer is in Li Yao's mind.

It contains infinite power and almost represents the name of "invincible". Even if just thinking about it, it makes Lee Yao feel difficult to breathe, his heart beats faster, his blood boils, his pores can't help expanding, and he wants to spray red steam.

Under the guidance of the golden mysterious man, he goes through the crystal tower and the operating table. In front of him is the end of the fog. It is also a repair and renovation workshop for heavy magic weapons.