"Who the hell are you?" The one who asked the question again was Zhuge Xun, who had not spoken.

Although he inherited the task of 'guarding the Southern Barrier' from his ancestors, what exactly is this mission? What exactly is the Southern Barrier? The man who claimed to be 'Sen' just now also mentioned the Lord of the Southern Barrier.

"Looks like I'll have to explain it to you from the beginning." Although Sen said that he was helpless, his expression was very excited. Finally, I have the opportunity to talk enough at one time, and usually no one talks to me because of my duties, and I really want to suffocate.

"That's it, you ask, it's up to us to answer, otherwise, we don't know if you really understand, if you don't understand, then you can't play the real role of this museum, isn't it meaningless to plan for such a long time." It was the Shiki who spoke.

"That's fine, then you ask, we can't leave here until you figure it out, and there's nothing going on at the door for the time being, and the other gatekeepers know that we're here to pick up the illusion back, and they've also stepped up the guards at the other doors." Sen said.

"Who are you? What do you mean by 'gatekeeper'? Liyue was the first to ask.

"Who are we, how can I explain this question to you?

In terms of human cognition before the 'Three World Wars', our identity should be 'aliens'.

For believers among human beings, our identity should be 'God'.

As far as the creatures of the dark world are concerned, our identity should be considered 'sages'.

As far as the creatures of all space are concerned, our identity is 'gatekeeper'.

But I prefer to be called 'Orderkeepers'.

Let me explain to you what a 'gatekeeper' is. Mori took a sip and continued to explain.

And several other people are also willing to let Sen explain, everyone is observing the illusion's expression, although he has no expression with his eyes closed, but everyone knows in their hearts that if he is in trouble now, without the constraints of the 'pavilion', it seems that the 'door' of this space will also be closed.

"When we talk about 'gatekeepers', we have to explain what we mean by 'gatekeepers'.

This door is defined by human understanding, that is, the 'star gate' is the door used to travel through various dimensions, and the five of us are the managers of all the doors from your level to the next. ”

"Is the door the kind of sci-fi movie we've seen before?" Liyue asked excitedly.

Because he has collected the genes of many celebrities, including the genes of various top scholars, there are naturally things in Liyue's brain that he doesn't know but are very familiar with.

"I don't know what the door looks like in your human science fiction films, but the door we guard, you should call it a 'black hole', and the 'black hole' is also a universal 'door' in all spaces, and if you want to achieve a 'space jump', you have to go through a black hole.

In other words, if one day you can make your own 'space jump', then the exit is a black hole.

When passing through the 'exit' of the black hole, the 'entrance' when it reaches the next layer of space is what humans call the 'white hole', and the 'wormhole' that humans have always thought of as a 'passage' is just a fast passage in this space.

We are the ones who guard the 'black hole', the ones responsible for allowing the biological races that can pass through on their own, and handing over the 'map' and 'rules' of the next layer of space.

At present, the layer of space where humans are located is the last layer of all spaces, and at the same time, in this layer of space, in addition to humans, there are still three other civilizations that have not achieved self-jumping.

Can you hear it so far? Sen asked five puzzled faces.

"Black holes are doors to other dimensions? Are you the guardians of black holes? So you're gatekeepers? Kate asked.

"Well, that's what we do." Sen said.

"How is the division of each floor of space? And, before 'that war', the origin of the black hole as we know it was from the collapse of stars, and you did say that it was a 'gate' to other dimensions, and you also said that there were other 'gatekeepers' besides you, so how many layers of space are there in the whole universe? How many 'doors'? Liyue asked.

"Answering this question involves the human understanding of the origin of the 'universe' before 'that war.'" Sen went on to explain.

"Before 'that war', or at the peak of the development of human civilization, mankind's inference about the origin of the 'universe' was that the universe was born from a 'singularity explosion'.

That's both true and not.

For the 'singularity' that humans know. For us gatekeepers and other advanced beings who are already capable of 'space jumping', it is actually a black hole formed by the collapse of a dead star that already exists in outer space.

Therefore, the 'universe' as it is known to mankind only exists in a black hole, and before the 'war' at the peak of human civilization, all human beings knew about the outside of the earth was only in this black hole.

Looking at your expressions, I still don't understand what I mean, but if you don't understand, then it's all in vain!

I thought it would be easy to explain to you......" Sen sighed weakly, sure enough, it would not be easy to change something that was already well known in the hearts of humans.

"We understand some of what you said, but there are also some that we don't. If the 'universe' we used to know exists only in a 'black hole', then there are countless black holes in the universe, isn't there an infinite number of 'universes'? Zhuge Xun asked.

"I'll explain it to you and see if you can understand it." Stoneken patted the feeble Mori and smiled.

I saw that he stretched out an index finger, and a faint light flashed at the tip of the finger.

"I'll show you a picture."

With the light of his fingers, he first drew a black oval in the air. From the perspective of Kate and others, it's like looking at a 'hologram'.

Then, Stoneken filled the painted ellipse with white mist and said.

"This elliptical shape is the 'universe' and 'black hole' that humans now know, and the white fog inside is the dust and matter or galaxies that exist in the universe."

After that, Chi randomly drew a few blue 'X's (crosses) in the white mist.

"The 'X' (cross) sign, which represents the existence of stars (spheres) in the 'same' universe."

Later, he randomly drew a few red '△' (triangles) in the white mist.

"This '△' (triangle) represents the planet where life and civilization exist in the 'same' universe."

Finally, Chi randomly drew a few black 'O's (circles) in the white mist.

"And this 'O' (circle) represents other black holes in the 'same' universe."

"What do you mean by drawing this picture......"

Chi smiled at Liyue, who was asking, and then continued to explain.

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