Behind this door, which had been sealed in dust for thousands of years, there was a shimmering green glow, and at first this light was very dazzling and it was difficult to see the way forward.

But it gradually softened, and the visible range was about seven or eight meters, which made them feel a little more relieved and could continue to move forward.

Otherwise, you can't see the road ahead, where do you dare to continue walking, maybe there is a cliff ahead, and you will fall into the dark abyss when you step on the air.

This time they didn't have to walk for long, and after only a few minutes, the scene ahead suddenly became clear.

At the forefront of the way was the little girl of astonishing strength who met outside the gate, her steps cheerful and jumping.

Soon ran to an empty mountain belly space location, if it was just an ordinary dark mountain belly space, it would not be surprising.

However, at this time, Guan Xiaofei and the others were shocked to find that the surrounding walls were all glowing with this green luster, and they were polished round and square.

This is clearly cut by hand, and even the surface of the wall is no longer covered with rock mass, but a shiny super-dense metal.

"Hey, what's going on, am I dazzled or dreaming, shouldn't we be underground, and there's an old one like that

Gate, but now how does it feel like you've suddenly arrived in another world, giving people the sense of spaceship?"

After Guan Xiaofei saw the scene in front of him clearly, he rubbed his eyes, and suspected several times that he was wrong, in fact, whether it was looking at the gate outside alone, or looking at the bizarre scene he saw now, it was within his acceptable range, but he saw both at the same time.

This gives him a strong sense of contrast, conflict and disparity, one is the product of an ancient civilization, and the other is the existence of a super-civilization.

No matter how you look at the two, they are things that are not related, but at this time they are in the same place, which makes people a little unprepared.

"What the hell is here...... Even contemporary science and technology can't build such a precise existence, and those are crystals?"

Mu Qingshuang also stepped forward with suspicion to observe the subtle details around her, and those standing pillars especially attracted her attention.

"Are these crystal pillars the source of energy here? The Situ Group is studying the way this energy is being released, but according to the report of the lead researcher, this energy only exists in a conceptual state, and there is no way to fully release it with the earth's environment, which is incredible. ”

Situ Weiyang has a certain understanding of the vector release method of this energy, but with her cognition, this situation should not occur.

"Is this what is called ultra-modernism? Who built this place? It's all so bizarre, and she's beckoning to us to go that way? It's like an underground town on such a grand scale, and it's like this under Obsidian?"

Mu Qingshuang took a deep breath, the impact on her cognition was not too strong, and she noticed that the little girl was waving at them in front of her.

She and Situ Weiyang and the others quickened their pace, and at this time they seemed to be in a bizarre underground castle.

"This kind of ancient ruins with an ultra-modern style is not without precedent, in fact, a similar ruin was found in Europe, which caused a lot of sensation at the time, but now it has been blocked and controlled by the European Union, Egypt has also been discovered, and Atlanta ......"

Lu Zhen frowned, her knowledge was better than that of Mu Qingshuang and the others, she had experienced too many dangerous things in the past two years.

But even so, the world still retains its veil of mystery, and what humans have glimpsed is only the tip of the iceberg.

If I'm not mistaken, there were similar sightings in Fuso, but they were quickly dismissed as rumors and didn't attract much attention, and in retrospect, they must have been blocked by the authorities. ”

Situ Weiyang nodded, based on the information between her and Lu Zhen, this relic did not exist independently, and it was not the first time it had been discovered.

"Then who built this kind of thing? Is it Optimus Prime's secret base? Since the current technology can't be created, then it can only be explained by the reason of aliens, if there really is such a setting as aliens in this world, what will they look like? Like ET?"

Guan Xiaofei walked in this underground town, surrounded by a large number of crystal pillars, although there were no lights, but the green light emitted by the crystals was enough to illuminate everything around, these buildings with a glow of turquoise were magnificent and magnificent, and the surface was flawless and natural.

It seems to be a priceless work of art, where can it be linked to the word architecture? Guan Xiaofei thought that he could dig out a piece of these crystals, which could be sold for a lot of money, so that he would not have to worry about food expenses.

"It doesn't have to be an alien, the earth has existed for more than four billion years, but the origin of human beings is only a short period of more than one million years, which means that the footprint of human beings is only equivalent to one in four thousand compared to the history of the entire earth. ”

In addition, human beings have really entered the era of civilization, which is only about 10,000 years, and the real explosive growth is the era of the industrial revolution in the last few hundred years. ”

"Even though human civilization once reached its peak and became the master of the world, the exploration of this planet is only a drop in the ocean, and even the bottom of the sea has not been explored to the tip of the iceberg, let alone the depths of the earth's core, there are too many places that we cannot reach. ”

Situ Weiyang shook her head, her knowledge is very solid, and she knows very well the history of human development and civilization.

"So Weiyang, what do you mean by this, why can't I understand it, can't I make it clearer?"

Guan Xiaofei groped and tried to find a sharp weapon to come out, otherwise he was very greedy when he saw these green and jade-like minerals, and asked casually.

"We have excavated traces of prehistoric civilization in many places, such as the site of a nuclear reactor, but judging by the age, it was more than 100,000 years ago, when human civilization was not born, and more than 10,000 years ago it was still in the Stone Age. ”

"So the only explanation that can be drawn is that there were many civilizations in the history of the development of the earth before us, but they were annihilated for various reasons, just like the mass extinction of the dinosaurs. ”

"After all, in a long period of time, enough to change too many things, whether it is geology or landforms, or whatever, in front of a planet that has lived for more than four billion years, human beings with only a few thousand years of civilization are too insignificant. ”

Situ Weiyang shook her head, she knew very well how humble human beings were compared to nature.

It is true that human beings once swelled to the apex and could dominate the life and death of other species, but in fact caused the extinction of a large number of species.

But after that catastrophe, the monsters defeated the humans, causing the humans to be on the verge of destruction for a time, which didn't come too quickly.

Humans who are so powerful are still so vulnerable.

"In other words, is it very likely that this was built by a civilization before human beings? Although crystal energy cannot be used under the existing conditions of the earth, if it is a prehistoric civilization, it is not necessarily, because some conditions of the earth at that time have not changed, right?"

Mu Qingshuang is also an honor student, and the communication between the top students is clean and neat, which makes Guan Xiaofei feel foggy alone.

"I still don't understand what you're saying, I only have one question, what are we doing here?"

Since Guan Xiaofei didn't understand, he simply threw away the question, but looked at Wuyue, waiting for her response.

Because they were all guided here by her, if they want to stop the demon beast army from wreaking havoc on the entire Canglong region, the only way is to find a way here.