The Zhizi can be reduced and become the base point, or it can be expanded to the eleventh dimension, becoming infinite and ubiquitous, but if it is expanded to the eleventh dimension, the three-body man cannot control the Zhizi.

And Zhang Xuan, as a saint, can control the highest thirteen dimensions, and the space has no secrets for Zhang Xuan.

In particular, the speed of this Zhizi is only approaching the speed of light.

The speed of light, in any universe, is one of the criteria that demarcates the boundaries of the strong, and if you bring yourself to the speed of light, you can complete eternal life until the end of the universe.

Evans, who was watching the information of the universe from the freighter at Base 2, suddenly felt a blur in front of him.

This is the image of Tomoko striking at high speed on his retina, a line of handwriting.

"We have come to Earth!"

Evans rubbed his eyes, and the line of handwriting changed again:

'Do not doubt that at your request, our fleet has departed and will arrive in four hundred and fifty years, and I am the precursor of communication, named Tomoko!' ’

"Is it really you? Doesn't it take eight years to communicate? ”

Evans trembled slightly, looked very excited, and sat on the ground with tears streaming down her face.

'Yes, we have three plans, some of which require your help!' At the same time, we will also provide assistance so that you can quickly integrate your strength! ’

"Oh Lord, please save the earth and destroy the tyranny of mankind!"

Evans said excitedly, and then began to introduce the civilization of the earth.

Zhang Xuan didn't have any idea about all this, as an observer, in addition to observing the earth and the three-body problem, he would also observe other galactic civilizations.

The elements in the universe are relatively balanced, and different environments give birth to different life.

But just like sprinkling sand on the ground, the sand in the middle part will be a little more, and then it will become uniform under the action of external forces.

From a macro point of view, the life system is dominated by carbon-based life and silicon-based life, supplemented by the rest of life.

And the war between the two major forces in the universe, the carbon-based federation and the silicon-based empire, has affected most of the universe.

The gravitational fluctuations caused by their war are the reason for the irregular movement of the three stars in the three-body world, and the influence of the stars cannot be eliminated by the scientific and technological means of the three-body world.

The mathematical law of the three-body problem can be solved with the eighteenth-order equation, but they cannot change the influence of the three stars on the three-body planet.

Eliminating a star can make the three-body world get a stable stellar environment, and there is no need to go to the universe for an expedition.

However, it is very difficult to eliminate a star.

The destruction of a star, most of which is due to the expansion of the star, so that the destruction of the star does not affect the planet, then it is necessary to make a low speed of light zone to constrain the star.

But if the Trisolarans have the ability to make a low-speed zone, they don't need to go on an expedition to the earth, their strength and theory, there is only one way out, and that is to escape.

Those who came to worship at Yang Dong's tomb, in addition to her mother Ye Wenjie and her admirer Luo Ji, occasionally there was a man who kept talking, and that was Ding Yi.

This Ding Yi, Zhang Xuan has also seen, it was more than ten years ago, Zhang Xuan met when he saw someone to study ball lightning, and he was also a relatively outstanding scientist.

"Why didn't you tell me? Physics isn't dead! ”

Ding Yi said dejectedly: "The particle experiment has failed many times, and there is no law to follow, but it is not without no way!" You even have the ability to observe the movement of the particles yourself! ”

"Oh, you mean people who use quantum states to directly observe particle experiments? Nice idea! ”

Zhang Xuan smiled: "But isn't there someone who has already entered the quantum state?" Why don't you let them go to the observation test? ”

"You know me?" Ding Yi looked at Zhang Xuan unexpectedly,

Zhang Xuan smiled: "Yes, I still know a little bit about science, and your research on ball lightning and macroatomic nuclei is indeed unique!" ”

"These things are classified, how do you know that? Could it be that you were sent to spy on me? ”

Ding Yi's face sank, these studies are the military's secret weapon research, and not everyone can easily understand it.

"Don't think about it, I'm just a grave watcher, you know, in the cemetery, there are often some strange things, you can use theology, or science to justify yourself!" Zhang Xuan said with a smile.

Ding Yi clenched his fists and said after a while:

"Yang Dong was not devoured by macroatoms, she also entered the quantum state? Is she still observing herself? So much so that her ghost appeared in the cemetery? ”

"Hehe, Schrödinger's cat, if you don't observe, you never know if the cat is dead or alive!

But one thing is for sure, even without observing, the cat will die of hunger, lack of water, a little sooner than receiving radioactive materials! ”

Zhang Xuan gently swept the dead leaves and said: "People in the quantum entangled state are not only observed by themselves, but also by other people in the entangled state, and even by other things!"

But they don't disappear because of it, and you know why?

That is, they and the observer are at the same latitude, and the state of the thing at the same latitude is stable, and there will be no different states due to high-dimensional observation! ”

"Same dimension?"

Ding Yi pushed his glasses and suddenly remembered his past.

At that time, he was just emerging in the field of theoretical physics, and he was soon attracted by the military's ball lightning project and invited to work with him.

The project was led by a girl named Lin Yun, and the assistant was Dr. Chen, who repeated the project because his parents were killed by ball lightning, and his mentor's lover was also killed by ball lightning.

Dr. Chen is very resistant to weaponized ball lightning, and he can't give up research, which is his life's work and obsession.

Dr. Chan discovered that ball lightning did not appear out of thin air, but always existed, but was not stimulated, so it could not be observed.

After that, they dragged a wire horizontally in a helicopter and searched the air, like electric fish, looking for ball lightning that had not been activated.

Luckily, they found a total of three ball lightning bolts, which unfortunately are not mild, and their appearance is often accompanied by death.

After several failed attempts to catch ball lightning, Lin Yun and Dr. Chen came to find Ding Yi to participate.

Unlike these weapons experts and applied physicists, Ding Yi is engaged in theory and is more strategic.

"First of all, this ball lightning is not actually lightning, and it doesn't have much energy itself, it's actually a transparent sphere visible to the naked eye, but you didn't observe it carefully!" Ding Yi looked at the information that had been sorted out.

"We are all veteran pilots, and our eyesight is above five point one, please don't question our observation on this point!" Five pilots expressed their outrage.