Speaking of time and space travel, we have to discuss in detail the "time and space paradox" of the revisions of the different world's non-cultivation demons.

According to the law of time, if a person wants to interfere with a certain timeline, there are several necessary points that need to be paid attention to:

First of all, before making changes to the timeline, it is important to note whether the actions that modify the timeline will touch special individuals with "uniqueness" or "fixed inertia".

The particularity of "uniqueness" has been mentioned before, taking Su Bai as an example, in order to change the history of the connection with Su Bai, the more difficult it is to see the closer the connection with Su Bai, and after a certain degree of closeness, it cannot be changed.

It can be said that people with "uniqueness" will not worry about anyone threatening the weak self in the torrent of time through the law of time, which is of course a good thing, but "uniqueness" is also not exhaustive.

The biggest flaw of the "uniqueness" of an existence is that it cannot interfere in any form with the existence of a history of its own, which means that only one self can appear in the same generation, and at the same time, the history of that generation cannot be modified remotely.

For example, if Su Bai wants to revise the historical line, then she can't interfere in any way for more than 500 years between the birth of "Yae Sakura's sister" and the point in time where Su Bai now exists, and the rest is free.

"Fixed inertia" is simpler, but it can be difficult to understand because this specificity is closely related to the law of fate.

To put it simply, for those who have "fixed inertia", the act of trying to modify the history of this person is itself part of the established history, and unless you are the Grand Master of Destiny, you cannot break the curse of this fate.

Therefore, "uniqueness" is extremely rare, and so far there is no way to break it, and the only way to break the "fixed inertia" is to interfere with the timeline of the time master who also understands the law of fate.

……

Secondly, if you want your behavior to modify history, you must have a certain understanding of the laws of time, or you must have a "unique" existence to do so.

Those who do not reach either of the two will not be able to interfere with the timeline even if they travel through time, because the laws of time will forcibly revise history after the return.

……

Third, in addition to the owner of "uniqueness", there can be two or more individuals of the same nature in the same timeline.

……

Time travel is only a matter of moments.

The sea of stars, the flying debris of time, the life and death all pass like fleeting phantoms, and the vision in front of us turns into a dazzling dazzle for a moment, and then returns to its normal hue.

But the surrounding scenery has changed dramatically.

There is no modern ingredient that can be called the crystallization of science and technology, and the whole world is covered in pure natural landscapes, and it is a huge primeval forest that is difficult to describe.

Clusters of large leaves the size of a basin are clustered on the giant trees dozens of meters high, and these leaves look like leather, which should be relatively tough, and the sunlight falls through the narrow gaps between the leaves and fills the entire forest.

The three of them were in the middle of a huge forest in the middle of nowhere, dark green at a glance, and there was no living creature in the area.

In Su Bai's elemental perception, there were a few strange amounts of bio-energy reactions, but most of them were Honkai Beast's Honkai energy reactions.

This forest is very large, but fortunately, the area where the three of them are located is a place relatively close to the border, and it only takes half an hour to leave the forest with Su Bai's usual flight speed.

That's right, she traveled here with the Obsidian Throne, and in another word, the Throne is the body.

But in front of Su Bai, in addition to the two events of how to return to the modern era and leave the forest quickly, there was also a certain thing about the black Ji Xuanyuan......

She turned her head to look at Ji Xuanyuan, looked at it carefully, and showed an expression that was a little unbelievable but felt reasonable, which made Ji Xuanyuan, who was being looked at, tilt his head expressionlessly.

"Hey, Li Xing......" Su Bai poked Li Xing's waist with his elbow, turned his head mysteriously and whispered in her ear, "That real particle just now was you the ghost?" ”

It's a question, but it's an affirmative tone, isn't that nonsense? Su Bai didn't know how to use the true law at all!

"I said that I am the ...... of the third perpetual motion mechanism," Li Xing reluctantly explained again, "The real particles embodied in the original true law should be able to help Ji Xuanyuan, who is just a spirit body, reshape his body, and doesn't it seem to be a success?" ”

Su Bai had a black question mark on his face, and asked in a low voice: "What do you mean by reshaping Hei Xuanyuan, aren't you doing something?" ”

"Trouble?" Li Xing was a little confused.

"How am I going to explain to you to let you know that Hei Xuanyuan is just a part of Ji Xuanyuan's body, and then because you let Hei Xuanyuan be withdrawn and reshaped as a separate individual, and eighty percent of us have traveled to Ji Xuanyuan's era, so we will face an inevitable thing......"

"You mean......" Li Xing suddenly realized, "We will meet, no, we will deal with two Ji Xuanyuan?" ”

Su Bai nodded, she knew that she had "uniqueness", so she knew that her words and deeds here might change history, so she was suddenly a little reluctant to go out.

"Apricot ...... If we travel back in time, when will we be able to go back? ”

"It's a matter of luck," Li Xing pouted, "Because this shuttle is accidental, the third perpetual motion mechanism is determined according to the surrounding environment in terms of random creativity, it was Hei Xuanyuan who activated the creation of space-time particles when he pulled us into the dream, and now there is no proper environment, of course, I don't know how to go back." ”

"So you really still want to go out?" Su Bai sighed, but he also felt that it didn't matter, changing history or something...... I'm invincible anyway!

Of course, Hei Xuanyuan's side can't make any hope, and now that he has broken away from Ji Xuanyuan and become a separate existence, Hei Xuanyuan can't drag them into the stigma space of the spirit without the help of the energy of the spirit body.

And even if it is dragged into such a space, it is impossible to create a tunnel back to the "Nine Shadows", and the stigmata space of Black Xuanyuan is established, so the space-time tunnel must also be one-way.

But this made Su Bai think of one thing.

“…… Since you can extract Hei Xuanyuan from Ji Xuanyuan and re-visualize it as a single individual, then you can also re-visualize yourself through the true law," Su Bai blinked.

Li Xing shook her head very calmly and said, "Because of some force majeure factors, I can't do it now." ”

"Oh......"

And I don't have any regrets, after all, I just can't do it "now".

"Then let's really put our eyes on the current situation, I can't think of a way to return to the original timeline for the time being, but I should be able to guess that it is in the Nine Shadows, but it should be more than a simple prerequisite for 'entering the Nine Shadows'."

Su Bai glanced at Hei Xuanyuan and then continued: "The Black Xuanyuan extracted from the true law doesn't have the memory of the original Ji Xuanyuan, right?" ”

"Only human instinct and the time memory so far," Li Xing seemed to understand this very well, nodded and explained, "The memory that started from blackening is the memory line that belongs to Black Xuanyuan alone, and the real particle divides 'existence' into two parts, so it can be regarded as a new human being." ”

Su Bai sighed, then rubbed Li Xing's soft pink hair and said softly: "I found that you have a lot of secrets, you can know these things that I don't understand very well, and you have at least the ability to be similar to the third perpetual motion mechanism...... Are you really Apricot's second personality? ”

"Oh, I'll definitely tell Sister Su Bai in the future," Li Xing showed a sweet smile, Su Bai couldn't feel any malice and bad breath from her, so he could only forget it.

Then Su Bai rubbed his face, letting all the helplessness on his face sweep away, and then turned his gaze back to Hei Xuanyuan who was standing on the ground, because he was no longer a spirit body, so it seemed that he did not have the ability to fly in his normal state.

"I thought Shennong could have two wives," Su Bai muttered to himself, showing a dumb smile as if he thought of something, "So it seems that this Black Yellow Emperor's brain is as pure as a baby, right?" ”

"I can't say that, I want to eat you really, but how to eat it needs to be studied, and it also maintains many people's survival instincts and basic common sense, such as the ...... of eating to get dressed," Li Xing said with a head.

"Stop, stop, what does the first sentence mean?!" Su Bai raised his eyebrows and found that things were not simple.

Li Xing spread his hands, shrugged his shoulders and said, "Don't you have a little B number in your heart for this kind of simple thing?" ”

“……”

"I haven't figured out what time it is, although I can guess that it was five thousand years ago through Hei Xuanyuan's matter, but the specific timeline hasn't been fully figured out, let's go out and have a look first," Su Bai rationally stopped playing tricks with Li Xing and proposed.

"You are the elder sister, you have the final say, but you still have to communicate with the person over there, although I think she is where you go with her," Li Xing gave Su Bai a look towards Hei Xuanyuan, and then picked up the latter sentence in a mocking tone.

Pressing his hands on the obsidian throne, Su Bai resisted the urge to slap Li Xing, before he withdrew his gaze from her and turned to Hei Xuanyuan, who was standing still:

"Now, I said......"

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PS: Although the theory of time and space may seem a little complicated and irritating to some people here, it does not affect the viewing, and it really can't be understood and will not cause the trouble of not being able to understand, but I think it should still be understandable, right? Eh hey hey.