700 years later

"Cheng Zhang" said on the screen: "Now, I am still alive. But you are not necessarily. Next, please listen to every word I say carefully, and do as I say, otherwise, not only you will be finished , I will be finished, and the whole universe will be finished."

"Cheng Zhang, the future can be changed." He said, "Time is not a straight line, and the law of cause and effect does not work as you imagine. You may have realized that the future you live in is not the best. , The disappearance of human beings does not mean that other civilizations can prosper, but a gloomy era. I sent you there to let you understand this and complete the task.”

"When you study history, you already know that the birth of artificial intelligence is a slow process, but it is not without key points. Six centuries ago, university professor Feng Man, the robot she invented was the first time to truly pass the Turing Afterwards, she was hired by a technology company with a high salary. After obtaining more technological breakthroughs and building a better team, Feng Man resigned and set up her own company. She couldn't wait to solve this controversial issue. Bring artificial intelligence to the market. Because she believes that this is the only way to truly liberate productivity. After getting rid of labor, human beings can move towards spiritual freedom, and using artificial intelligence in the field of judicial administration can also avoid social injustice to the greatest extent She sells robots at a price that is almost unprofitable, attracting companies and factories that want to reduce costs, and soon triggers a frenzy of artificial intelligence. Under the guidance of Feng Man's thinking, other technology companies have also begun to follow suit. The rapid development of intelligence far exceeds the expected speed, ushering in a wave of unemployment. But Feng Man firmly believes that this is only temporary, and she is indeed partly right, when the era when artificial intelligence can really completely replace humans and even do better , Human beings don’t have to worry about unemployment anymore—the number of births is beginning to be lower than the number of deaths.”

"Then what can I do?" Cheng Zhang asked, "Do you want me to go back and kill her?"

"Of course you don't have to kill her," said Cheng Zhang over there. "It's useless to kill her. Someone will invent it one day. You have to go back to before she succeeded, tell her to change the method, and tell her that if she insists on her own way, it will bring harm to her." The ending. She wants human beings to be free, but freedom is not something that can be done by handing over all the work to others. She is a smart person, you just go and tell her, and she will understand what to do. The future is yours In my hand, I have already set it up for you, press the button on the left side of the watch, and you can go back to that year, find Feng Man, repair the cracks in time, save yourself, and save mankind."

The video ended, but Cheng Zhang just stood there. He didn't pick up the watch and press the button he should press as he said.

"What's wrong with you?" Dou Yu asked, "He... no, you already said it yourself, this is the watch you sent over by yourself, you should go back."

And the future that Cheng Zhang has changed even has technology that travels through time and space.

"He didn't say anything." Cheng Zhang said.

"What didn't you say?" Dou Yu felt that he had explained in detail enough.

"You." Cheng Zhang said, "How are you? He didn't mention a word."

Dou Yu was dumbfounded, Cheng Zhang was actually thinking about this question.But as long as you think about it a little bit, you know what will happen to you.

If Cheng Zhang changed everything, then Dou Yu at this moment is the one who should disappear.700 years after that human being has not yet become extinct, there is no Dou Yu, if there is, it is another completely different person, at least, there is no "the only human in the world".

"But..." Dou Yu wanted to say again.

"But you still have someone who is reluctant." It turned out that the video was not closed, it was just a black screen, and Cheng Zhang appeared again, "Then, you have another choice. There is a button on the right side of the watch. You can directly Go back to 2018, finish your dissertation, continue to go to work, work, Dou Yu will not die for a while, and live alone until he dies naturally without disease or disaster. Everyone is happy, and nothing will change."

What a godlike choice this is.

"Is there no option for me to be in the same space as him?" Cheng Zhang asked.

"What do you think?" Future Cheng Zhang said.

The video ends here.

Cheng Zhang froze in place until Dou Yu picked up the watch and gave it to him.

"I want to destroy it." Cheng Zhang said.

Dou Yu hurriedly withdrew his hand: "No way!"

Cheng Zhang felt forced into a dead end by himself: "Then what can I do? Kill you with my own hands? Or will I never see you again?"

Cheng Zhang didn't understand why he would let himself make this choice, and he didn't look sad at all.

"Let's not think about it now," Dou Yu said softly, "I'm hungry, let's eat first."

He didn't let Cheng Zhang go, he ran to make food by himself, but kept looking back, afraid that Cheng Zhang would have any accidents.

When Dou Yu came back, Cheng Zhang had already made up his mind.

"You can cook well now, and you can take care of yourself." Cheng Zhang said while eating, "The cat... I will leave it to you. Although it is not a real cat, remember to give it to me on time." It feeds and plays with it."

"You plan to go to 2018." Dou Yu said.

"Yes," Cheng Zhang thought. He made a selfish decision. He seemed to abandon the future of all mankind. , just go online and chat with the pirate captain, or forget about me."

"I know you will choose this way," Dou Yu said calmly, "You will not let me die."

Of course he knew, but he shouldn't choose this way, he can't choose this way.If it was before Cheng Zhang appeared, Dou Yu would not have such an idea, but Cheng Zhang has brought a wonderful possibility, after 700 years full of human beings, one can sail to another possible future.

Cheng Zhang looked at Dou Yu's unusual calmness, and an ominous premonition arose in his heart: "You..."

Before he finished speaking, Cheng Zhang's tableware fell on the table, his limbs began to feel weak, and his mind was also dizzy. Cheng Zhang tried his best to open his eyes, and the watch was in Dou Yu's hand.

"Dou Yu," Cheng Zhang said, "you have no power, this is mine, and I don't agree with you doing this."

"The second method you mentioned will not work at all. If you don't make changes, where did you come from in the video, that you have a time machine to send you here, and tell you what to do? The latter option is just You are expressing your inner thoughts, and you would rather never see me again than let me disappear. But Cheng Zhang, this is impossible, it is enough for me to know your thoughts, now, I have another solution." Dou Yu said, "In the future, when you have a machine that can travel through time and space, remember to come back 700 years later and see what that Dou Yu looks like."

Cheng Zhang really regretted pulling Dou Yu to watch some TV dramas of their era, but Dou Yu actually learned how to prescribe drugs.

"Goodbye." Dou Yu said.