Luo Ji stood up with difficulty. In the weak trembling, he could only stand by and hold the tombstone. He freed a hand, adjusted his muddy and wet clothes and unkempt hair, and then fumbled for a metal tube from his coat pocket. It was a pistol full of bullets.

Then, facing the morning light in the east, he began the final confrontation between the earth civilization and the three-body civilization.

"I speak to the three-body world." Luo Ji said, her voice is not high. He wanted to repeat it, but he didn't. He knows that the other party can hear him.

Nothing has changed. The tombstone stands quietly in the quiet of the morning. The puddle on the ground reflects the brightening sky, like a mirror, giving people the illusion that the earth is a mirror sphere, and the earth and the world are just a thin layer attached to it. Now, due to the erosion of rain, the smooth surface of the sphere is exposed one by one.

This world, which has not yet awakened, does not know that it has been put on the gambling table of the universe as a bargaining chip.

Luo Ji raised his left hand, revealing something the size of a watch worn on his wrist, and said, "This is a vital sign monitor, which is connected to the cradle system through a transmitter. You must remember the story of Ray Diaz two centuries ago, so you must know what the cradle system is. The signal sent by this monitor reaches the 36 14 nuclear bombs deployed in the solar orbit by the Snow Scene Project through the link of the cradle system, and the signal is transmitted once every second to keep these nuclear bombs in the non-triggered state. If I die, the maintenance signal of the cradle system will disappear, all nuclear bombs will be detonated, and the oil film material wrapped around the nuclear bombs will form 36 14 interstellar dust clusters around the sun in the explosion. From a distance, covered by these dust clouds, the sun will flicker in visible light and other high-frequency bands. The positions of all nuclear bombs in the sun's orbit are carefully arranged, which will make the signal formed by the sun flicker send out three simple figures, just like the three figures I sent out two centuries ago. Each figure is arranged with 30 points, and one of them can be combined into a three-dimensional coordinate map. But unlike that time, this time, it is the relative position of the three-body world and the surrounding 30 stars. The sun will become a beacon in the galaxy. Cast this spell. Of course, the positions of the solar system and the earth will be exposed at the same time. From the point of view of the Milky Way, it takes more than a year to complete the graphic launch, but there should be many technologies developed to such a civilized level that the sun can be observed from multiple directions at the same time. In this case, they can get all the information in just a few days or even hours. "

With the dawn of the sky, the stars disappear one by one, as if countless eyes were gradually closed; The morning light shining in the east is like a big eye that slowly opens. Ants continue to crawl around Ye Wenjie's tombstone and walk through the maze of her name. As early as 100 million years before the gambler standing by the monument appeared, his race had already lived on the earth, and the world had its share, but it didn't care about what was happening.

Luo Ji left the tombstone and stood beside the grave he dug for himself. He raised his pistol to his heart and said, "Now, I want to stop my heart, and at the same time, I want to be the biggest criminal in the history of the two worlds. I am deeply sorry for the crimes committed by the two civilizations, but I will not repent, because this is the only choice. I know Naoko is around, but you never pay attention to human calls. Silence is the greatest contempt. We have endured this contempt for two centuries. Now, you can keep silent if you like. I will only give you thirty seconds. "

Luo Ji timed himself according to his heartbeat. Because his heart is beating fast now, he counts it twice a second. Extremely nervous, he made a mistake from the beginning and had to count from the beginning. So when Naoko appeared, he was not sure how much time had passed. The objective time is less than ten seconds, but the subjective time is as long as a lifetime. Then he saw that the world was divided into four parts, one part was the real world around him, and the other three parts were deformed images. The image came from three spheres that suddenly appeared in front of him. They all have full mirrors, just like the tombstone he saw in his last dream. He doesn't know that this is the expansion of several dimensions of Naoko. These three spheres are very big, covering half the sky in front of him and blocking the eastern sky that is lighting up. In the western sky reflected by the sphere, he saw several remnant stars, and the deformed cemetery and himself were reflected under the sphere. What Luo Ji wants to know most is why there are three. His first thought was the symbol of the three-body world, just like the artwork Ye Wenjie saw at the last ETO party. But when he saw the distorted but unusually clear realistic image reflected from the sphere, he felt that it was the entrance of three parallel worlds, suggesting three possible choices; What I saw next denied his idea, because two identical words appeared on all three spheres:

Stop it!

"Can I talk about the terms?" Luo Ji looked up at the three spheres and asked.

You put the gun down first, and then we can negotiate.

These words are still displayed on the three spheres at the same time, and the handwriting is glowing red and extremely eye-catching. Luo Ji saw that the lines on the sphere were not deformed, and they were neat lines, so that the surface and interior of the sphere looked alike. He reminded himself that this is the projection of high-dimensional space in the three-dimensional world.

"This is not a negotiation, but requires me to continue to live. I just want to know if you promise or not. "

Say what you want to say.

"Stop water droplets or detectors from emitting radio waves to the sun."

I have done as you said.

Sphere's answer was unexpectedly fast. Luo Ji can't verify it now, but he feels that some subtle changes have taken place in the surrounding space, just like some background sounds have disappeared because of its persistence. Of course, this may be an illusion. People can't feel electromagnetic radiation.

"Let these nine water droplets that are heading for the solar system immediately change course and fly away from the solar system."

This time, Sanqiu's answer was slightly delayed for a few seconds.

I have done as you said.

"Please give human beings the means to verify."

All nine detectors emit visible light, and your Ringo-Fitzgerald telescope can observe them.

Luo Ji is still unable to verify these, but this time, he believes in the three-body world.

"The last condition: the three-body fleet must not cross the Oort Nebula."

The fleet is now at the maximum deceleration propulsion power, and it is impossible to reduce the relative speed with the sun to zero outside the Oort nebula.

"It's like the formation of water droplets, which makes the route deviate from the solar system."

Turning in any direction is a dead end, which will make the fleet cross the solar system and enter the desolate space. By then, it will take a long time to return to the three-body world or find other feasible galaxies, and the fleet ecological circulation system will not last that long.

"This is not necessarily a dead end. Maybe in the future, humans or spacecraft in the three-body world can catch up and rescue them. "

This requires instructions from the top leaders.

"After all, turning is a long process. Start first and give me and other lives a chance to live. "

There was silence for three minutes, and then:

The fleet will begin to turn in ten minutes after the Earth is timed. About thirty minutes after turning, the human space observation system will be able to detect the change of course.

"Well, that's enough for me." Luo Ji said, at the same time, he took the pistol from his chest and held the tombstone with the other hand, trying not to fall down. "Do you already know the dark forest state of the universe?"

Yes, I have known for a long time. It's strange that you don't know so late ... your health worries us. Did you accidentally interrupt the maintenance signal of the cradle system?

"No, this device is much more advanced than Rí diaz. As long as I am alive, I will not interrupt the launch. "

You'd better sit down, which will improve your situation.

"Thank you." Luo Ji said, and sat down against the tombstone. "Don't worry, I won't die."

We are in contact with the two largest international organizations. Can we call an ambulance for you?

Luo Ji smiled and shook his head. "No, I'm not the savior. I just want to get out of here and go home like a normal person. I'll leave after a break. "

Two of the three spheres disappeared, and the remaining one showed that the handwriting was no longer glowing and looked gloomy:

We still failed in strategy.

Luo Ji nodded. "It is not my invention to block the sun with dust clouds and send information to the stars. As early as the 20th century, astronomers put forward this idea. In fact, you have had many opportunities to see through me. For example, during the whole snow-making project, I have always been so concerned about the precise position of nuclear bombs in the sun's orbit. "

You stayed alone in the control room for two months, remotely controlling the ion engine on the nuclear bomb to fine-tune the position. We didn't care about this at that time, thinking that you were just escaping from reality through meaningless work. We never thought about the importance of the interval between these nuclear bombs.

"There is another chance, when I asked a group of physicists naokou in space. If Eto 'o were still here, they would have seen through me. "

Yes, it was a mistake to abandon them.

"In addition, I request to establish such a strange cradle trigger system in snow engineering."

This really reminds us of Reddiaz, but we didn't think much about it. Reddiaz was harmless to us two centuries ago, and the other two were harmless to us. We also transferred our contempt for them to you.

"It is unfair to despise them. Those three defenders are great strategists. They clearly saw the fact that human beings will inevitably fail in the doomsday war. "

Maybe we can start negotiations.

"That's none of my business." Luo Ji breathed a long sigh of relief, feeling as relaxed as a new student.

Yes, you have accomplished your mission, but you can always give some advice, right?

"Human negotiators must first put forward that I hope you can help build a more perfect signal transmission system, so that humans can master the ability to launch spells into space at any time. Even if the water drops lifted the blockade of the sun, the current system really started in Taiyuan. "

We can help build a neutrino emission system.

"As far as I know, they may be more inclined to gravitational waves. After the arrival of Naoko, this is a further field of human physics. Of course, they need a system that they can understand. "

Gravitational wave antennas are huge.

"That's you and them. Strangely, I don't feel like a human now. My greatest wish is to get rid of all this as soon as possible. "

Then they will ask us to lift the blockade of Naoko and teach science and technology comprehensively.

"This is also very important for you. The technology of the three-body world is developing at a constant speed. Until two centuries later, the faster follow-up fleet has not been dispatched. Therefore, to rescue the yawing trimaran fleet, we can only rely on future humans. "

I'm leaving. Can you really go back by yourself? Your life concerns the survival of two civilizations.

"No problem, I feel much better now. I'll hand over the cradle system as soon as I get back. Then, all this has nothing to do with me. Finally, I just want to say: thank you. "

Why?

"Because you let me live, in fact, as long as we change our thinking, we can all survive."