"Brother Lin, how can this thing have my breath?" Rui looked at the tiger-shaped pendant in Yi Xiaochuan's hand and was puzzled, and Rui found that there was still its own function on this tiger-shaped pendant, but it was only a low-profile version, which could improve physical fitness and add two of its own treatments, nothing more.

"Rui, since we came to this plane, we have been together, how can I possibly know why this tiger-shaped pendant has your power, I think it should be some of the back hands that we did two thousand years ago, but let's not participate in it now, it is possible that some of the plans we did two thousand years ago will affect some things, but two thousand years ago we should know what we are like now, so as long as we follow our thinking, It shouldn't affect some of our future plans for 2,000 years ago! ”

"I also have one of the most practical ideas: to tell you a story: a person who takes a time machine back to the time when his grandmother was 16 years old, and then kills his own grandmother, then does this person really exist? If there exists, he killed his own maternal grandmother, without which his mother came from? Where did he come from? If not, then who killed the grandmother?

This is known as the grandmother paradox. The paradox caused by the pre-crossing Ogawa and the thousand-year-old demon can basically be classified as such.

I've read a lot of posts about the bar.,Many friends can't understand how the two Ogawas exist.,So some friends use the concept of parallel universes to explain.,Or use Ogawa A,B,C.。。。 to label the explanation. Personally, I don't agree with it, because the story told by the myth is in a universe, and Ogawa's is indeed a person.

I'm a sci-fi fan, and I'm more of a fan of time-traveling novels, so I'm going to use my own way to structure the mythical time paradox, provided you believe that time travel exists, otherwise we won't have a basis for discussion.

For a better understanding, let's give you an analogy: you pick up a book, open a page and start reading, the page number is 54, you read a few pages (to page 60), you think the book is wonderful, so you start reading from the first page, and you see the last page without skipping. So by the time you get to page 54, do you already know the story on pages 54-60? And even if you know the story of pages 54-60, you can't change it, because it's already written in the book, and you can only passively accept it the second time.

With this analogy understood, then we can begin to deconstruct it.

Okay, Sherlock Holmes, please pick up your pipes and let's solve the mystery together!

We set Yi Xiaochuan was born in 1984, from 1984 to 2010, Xiaochuan was like us, in a straight line in life, 1984-1985-1986-......-2009-2010, STOP! From here, Ogawa returns to 200 BC, and then the timeline changes from 200 BC to 199 BC-......- 1984-1985-......- 2009-2010, and it can be seen that Ogawa was 26 years old when he first experienced 2010, and when he traveled to 200 BC, he was still 26 years old, and in 1984, he was 2200 years old, at this time, he was born at the age of 1.

As a result, the time paradox began to arise, was Ogawa 1 or 2200 years old in 1984? The answer is, both, Xiaochuan is 1 year old and 2200 years old, 1-year-old Xiaochuan and 2200-year-old Xiaochuan exist at the same time, but they can't meet, because 1-year-old Xiaochuan is the past of 2200-year-old Xiaochuan, and 2200-year-old Xiaochuan is the future of 1-year-old Xiaochuan, if you meet, it is the past meets the future, then Xiaochuan before crossing may not cross, 2200-year-old Xiaochuan does not exist, 2200-year-old Xiaochuan does not exist, so who did Xiaochuan meet before crossing?

Gao Yao also has the same problem, he tried his best to intervene in the crossing, but he couldn't succeed, because once he really stopped the crossing, he himself became a paradox, in the same way, both Ogawa and Gao Yao could not intervene in each other's crossing, otherwise they would become paradoxes.

The question arises, why can't it be intervened? We saw that the black-robed man Gao had to do a lot to stop it, but before the crossing, Xiaochuan Gao Yao still got the box and the jade pendant by mistake, and successfully crossed with Gao Yao. This uses a speculation in the "Malaysian Law on Time and Space Travel" written by Taishan Beidou Wang Jinkang in China's science fiction industry, that is: we go back to the past and try to change some things, but we can't do it, because time and space have their own order, once changed, paradoxes will arise, the universe will collapse, and the self-protection of time and space will not allow paradoxes to occur, then time and space will choose an optimal result to ensure that the rationality of the universe continues to continue, and at the same time allow some changes that do not affect historical facts.

For example, in the first episode, the black-robed man's subordinates are digging jade pendants, and at this time, Gao Yao has not yet crossed, and it stands to reason that he cannot send someone to dig it, but after crossing, in order to avoid his own tragedy, it is a reasonable thing to stop it, so the change allowed by time and space is: the black-robed man Gao wants to prevent the action of crossing, and what is not allowed is: Gao must successfully prevent crossing. Therefore, under the influence of the optimal result of space-time selection, high-level actions are allowed to be carried out, but they are bound to fail.

is also the self-protection of time and space, and neither Ogawa nor Gao Yao can meet their former selves before they travel. For us, the past is just the past and can only be remembered, but the 2,200-year-old Ogawa can see his own growth from 1984 to 2010 until the crossing is successful. Gao Lan accused Xiao Chuan of not coming out to explain after crossing over, and Xiao Chuan's unspeakable concealment also comes from this: time and space are not allowed to change.

Speaking of which, everyone should solve their doubts, right? Let's take another piece of paper and a pen and draw a straight line, the lifeline of our ordinary people is a line segment, starting from the left end and ending at the right end, Xiaochuan is also a line segment before crossing, but, at this point in 2010, Xiaochuan's lifeline will turn to the node of 200 BC, and it will continue from 200 BC to 2010, so at the node from 1984 to 2010, Xiaochuan's lifeline has passed twice, so it seems that Xiaochuan has become two people, in fact, Xiaochuan is still one, and the lifeline is still one, but, his lifeline is the word "z". ”