Chapter 2

First of all, I want to say that you should read this book as a novel. True science cannot explain the magic of time travel.

Next, the time axis I refer to is based on the theory from classic American time travel movies from the 1980s.

This is the axis theory.

I really want to draw a diagram, but unfortunately, I don't know how to put it here.

Let me give an analogy: Five thousand years of history are like a straight road, and this road is the time axis.

Because the protagonist travels back to the year 626 AD and changes the history of 626, two different theories will emerge. One is the same-road transformation theory, which suggests that the future will change.

The other theory is the time axis divergence theory.

You can understand it as a fork in the road, a fork at about a 45-degree angle, which will lead you away from the original time axis, getting further and further away.

History has a strong self-repairing nature. It might deviate from the original time axis and then return, or it might reach a state of gravitational equilibrium at a certain distance, like the moon orbiting the Earth.

At this point, there are two different time axes, each with a different future.

Now, let's talk about the four-day issue.

The four days come from a European science fiction novel from the 1980s. Of course, it is also a non-scientific novel, so don't try to analyze it. Just consider it as my own design.

The four days are a relative value.

The protagonist must return to the modern era after four days in the Tang Dynasty, and the time spent in the modern era is four hours. Of course, there might be some time calculation errors in certain chapters.

Similarly, after four days in the modern era, the protagonist must return to the Tang Dynasty, and the time spent in the Tang Dynasty is also four hours.

Then, the time axis appears, and the time machine evolves.

When the protagonist changes history, they enter a new fork, and a time difference appears.

In the first stage, the ratio is 1:2. The protagonist will return to the modern era after eight days in the Tang Dynasty, and the time spent is still four hours.

This ratio will increase or decrease due to changes in the time axis.

The forced time difference can be understood as storing several round-trip opportunities, which makes it easier to understand.

Regarding the age issue, I'll keep it a secret. It relates to a huge plot twist in the future, one that will make you search on Baidu hundreds of times. Hahaha.

Thank you all for liking this book.

If there are any unreasonable aspects in the design, please feel free to point them out.

I'm not afraid of criticism, but I reject trolls and haters.

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