Huaxia space agency.
Cao Liang, already the supreme leader, announced to the crowd with uncontrollable excitement: "the news just came, we have destroyed all the enemy''s Star Destroyers, mankind, victory in this war!"
"Twenty years, finally a dream!" he Jingcheng clenched his fist and looked out of the window. There, more young people were busy fighting for the aerospace industry.
"I''ve been waiting too long for this day!" Zhang Yan sighed. "Finally, I don''t have to suffer any more!"
……
"We won... Help me up." Liu Yuan said weakly on the hospital bed.
"Yes, teacher, we won!" Dong Jiangbo, an old man in his 60s, can''t hide his emotions and has a heavy breath.
"I can still see this day and die without regret!" Liu Yuan smiled happily.
……
"Did it! Son, he did it!" Du Xingyu''s parents hugged each other tightly.
……
On the way back from Neptune, Du Xingyu sent a message to the administrator of Fuguang company. There was only one word for them to publish to their account.
After nearly four hours of delay, the operation of Fuguang company finally received this message.
"Boss!" the operator reported the news to Director Jiang Lei.
"This..." when Jiang Lei saw it, he immediately shouted: "immediately, immediately, give it to everyone, regardless of whether they are men, women, children, native people or foreigners. As long as they are our users, they will force us to push this message!"
In the past, this move would have been scolded to death, but now he knew that no one would blame him, but would appreciate him.
Soon, the floating light users all over the world revealed a message. There was no picture or background music. There was only one sentence: "the decisive battle between human civilization and Neptune of marine civilization, we human beings have won!"
The publisher of the news is "earth observation", Du Xingyu''s account!
This simple sentence makes hundreds of millions of netizens crazy in an instant!
"Neptune decisive battle, mankind wins!"
"Zanzanzan, I''m crazy! I''m so happy!"
"How many years have it been to this day? I have known alien invasion since I was a child. I have lived in their shadow for half my life. Today I can finally be liberated!"
"Long live mankind! Du Xingyu is mighty! Thank you, all the soldiers who set out to fight!"
"Today is the happiest day of my life!"
"@ Xiao Wang doesn''t eat melons, @ a little chirp... Come and see!"
This message, like, comment and forward reached the peak in the history of the network!
All the news is being forwarded. The human Guardian alliance has also released the latest news to confirm the victory of mankind and said that it will hold a world press conference to explain in detail the results of the campaign.
"Celebrate the victory of mankind!" some people are already cheering loudly in the streets and alleys of China.
"I sing for you, I bless you..." tens of thousands of people in the square stopped and sang loudly together.
Men and women, young and old, rich people, staff, students and service workers are all in tears at the moment, looking at the sky singing loudly. The melodious singing is full of joy!
"It''s worth it!" in Chengfeng space technology company, Fang Jiayou laughed a few times and fell asleep. He hasn''t slept for a long time.
"Cheers!" Wang Wei, Lv Liang and other Du Xingyu''s classmates and colleagues raised their glasses to celebrate!
……
In North America, people use it on the streets and shout loudly.
In South America, countless people began to revel, dancing and singing in the streets!
In Europe, every country today is a carnival day, and joy fills the whole world.
In Australia, Asia and other countries, the celebration will not be different because of different voices. At this moment, the mood of all mankind is the same.
The haze that has shrouded mankind for nearly 20 years has been swept away, the light shines in everyone''s heart, and the war with the sea civilization is finally over!
……
There was still a lot of work to be done at the end of the war, but Du Xingyu pushed off most. Du Xingyu is not in a hurry to study the captives of the sea civilization and their technology.
The human Guardian Alliance announced one thing after another, and the wartime state was lifted.
People cheered the names of heroes, presented gifts and sang for them. And the warriors who gave their lives were also remembered by them. People use memorial halls and huge monuments to remember their heroic deeds
Du Xingyu finally returned home.
"Dad, mom." Du Xingyu''s appearance is still so young, but his parents have white temples, sunken crow''s feet and much older.
"Back!" Li Rong immediately stood up, pulled over Du Xingyu and said painfully, "I''ve suffered."
"Just come back. Can you stay a few more days this time?" Du Zekang''s voice was not as severe as before.
"Well, I''ll stay for a long time this time." Du Xingyu nodded.
"Dad, mom!" a woman with beautiful appearance, graceful figure and tender skin like a newborn shouted timidly.
"Is it Lian Qiu? Come in and look forward to you!" Li Rong warmly welcomed Xu Lianqiu into the house. "I''m waiting for you to have dinner. It''s rare for our family to get together once!"
……
Du Xingyu stayed at home for some time and went to see his teacher, Liu Yuan.
"Teacher, I''m coming." in the special ward of aerospace hospital, Du Xingyu sat carefully by Liu Yuan''s bed.
The old man on the bed was haggard and weak in breath. Now he didn''t even have the strength to sit up.
Du Xingyu and the nurse carefully picked him up. Although Liu Yuan was weak, his face was still kind.
The nurse whispered, "Mr. Du, Liu hasn''t laughed for a long time. He''s in a good mood when he sees you."
"You did a good job," Liu Yuan praised.
"All teachers teach well," said Du Xingyu.
"I don''t have such a big ability." before Liu Yuan finished a sentence, he had to catch his breath. He continued: "I have no regrets to see the victory of mankind before I die."
"Teacher, you will get better." Du Xingyu comforted.
"Don''t comfort me," Liu Yuan said. "I''m not suffering from a terminal disease, but my life has come to an end."
"I am not afraid. I have done enough in my life, and I have so many students to continue my ideals and career..."
Du Xingyu listened quietly. Liu Yuan said, "at the end of my life, I''ve been thinking about a problem."
"What is the teacher thinking?" Du Xingyu asked.
Liu Yuan rested for a while before he said, "the Hai people have a longer life span than humans. It is said that their average life span is more than 1500 years. Among them, those who live longer will even reach more than 2000 years."
"Such a life span, after 40 light-years of travel, is also in its twilight years."
"For an interstellar civilization, this is absolutely abnormal. How can an interstellar civilization consume most of one''s life because of one trip?"
Du Xingyu also pondered. He sighed: "the sea people have a life span of more than 1000 years. If they have to spend most of their life on an interstellar journey, the life span of mankind is even shorter."
"Yes, it''s too short," Liu Yuan said with emotion. "It''s too short to travel between stars, or even learn more knowledge."
He grabbed Du Xingyu''s hand and said in a weak voice, "even the smartest child can become an expert in his subdivided field only when he starts learning from an early age. When he wants to learn more knowledge, his life is over."
"If this goes on, how will science and technology develop and civilization progress?"
"If the life span of mankind does not get a breakthrough, mankind will always be a low-level civilization!"
"Xingyu... Cough... I don''t have time. You still have a chance!"
"Teacher." Du Xingyu understood Liu Yuan''s meaning. If mankind continues to develop like this, civilization will not progress, but will be "locked up", and even the original stage of Hai civilization can not be reached!
"I know. I will pay attention to other aspects of scientific and technological development," Du Xingyu said.
He once wanted to develop science and technology in other directions, but the crisis of sea civilization has forced him to study space science and technology.
"OK... OK!" Liu Yuan showed a pleased expression.
He slowly closed his eyes and said, "I''m tired. I''m going to sleep..."
His voice became weaker and weaker, and the fluctuating line on the ECG gradually flattened.
"Old Liu!" the nurse exclaimed.
"Teacher." Du Xingyu bowed silently to Liu Yuan to show his respect.
……
Du Xingyu attended Liu Yuan''s funeral, as well as students from the Academy of Sciences, the space administration and the University of Astronautics.
The students presented flowers, wrote sacrificial words and prayed for their teacher.
In front of Liu Yuan''s grave, Du Xingyu stood quietly.
"What are you thinking?" Xu Lianqiu''s voice came from behind him.
"The teacher said something to me before leaving..." Du Xingyu said, "I was thinking, how can human beings break the limit of life?"
"Maybe I can study my cells." Xu Lianqiu stretched out her hand and said, "the information of high-dimensional civilization makes my cell activity exceed that of normal humans."
Du Xingyu shook his head and said, "this does not solve the problem. The biotechnology of the whole mankind is too weak to find anything."
"We can invest in biotechnology," Xu Lianqiu suggested.
Du Xingyu smiled and said, "of course, but this is not the best way."
"What''s the best way?" Xu Lianqiu said strangely.
"I don''t know. I''m still thinking, but there should be an answer soon," Du Xingyu said.
……
"The best way is to leave here temporarily and start a new experiment!" the science and technology simulator reminded, "in this world, the main research direction of mankind is space science and technology. This is not the soil for the development of biotechnology. You can make some achievements by studying biotechnology here, but you can never reach the peak of biotechnology civilization!"
Du Xingyu said: "the world has just begun! Human civilization has just started. Without the threat of sea civilization, science and technology will develop faster!"
"You''re right," said the technology simulator, "but this is not the first time. Remember, I''m the crystallization of human civilization technology from parallel time and space. In other time and space, human civilization has failed many times. If you don''t make changes, the final outcome will be the same."
"Parallel space-time? Will it really exist?" Du Xingyu asked.
"Of course!" said the science and technology simulator. "The so-called time of mankind began with the big bang. What was the starting point of time before the big bang?"
"At that time, the universe was a singularity of infinite mass, and now all matter in the universe exists in this singularity. Will these matter fly out in the only way to form a fixed universe in the big bang?"
"Not necessarily, they have countless ways," Du Xingyu guessed.
"Yes, countless ways, every way will open a new cosmic space and time. Your space-time is only one of the countless three-dimensional universes. Most parallel time and space are like transient bubbles. They will quickly come to an end. Only a few parallel universes can sustain a longer time."
"There are so many mysteries that only civilizations at higher latitudes can know. What I can do is to use all my energy to let you or your mind enter another human world parallel to time and space and start a new experiment!"
"And I must remind you that you are in your forties. Even if I make your life expectancy higher than the average human life expectancy, in the next few decades, if the world does not develop technology to break the limit of human life, you will also die."
"You mean, you can let me cross?" Du Xingyu said in surprise.
"I couldn''t before, but now I have accumulated enough energy." the science and technology simulator advised, "a single direction of science and technology development can indeed become an advanced civilization, but in the end, it can''t be avoided. You should also find this problem."
Du Xingyu is meditating. Although space technology is relatively developed in the world, it has encountered a bottleneck.
Humans can''t break through the speed of light, that is, they can''t reach other galaxies quickly. A space voyage will even cost generations of lives; In addition, human life also limits their scientific and Technological Development and knowledge learning.
"This is the world where I was born... Let me go to a new time and space..." Du Xingyu''s heart is difficult to accept.
The technology simulator said, "I''m not asking you to give up here, but let your mind ''go through''. You can freeze your body and wait until you develop the new classified technology to a certain level in the second world, and then return to this world."
"The world still exists, and your first experiment has just begun. The interstellar civilization is not just going out of the solar system! It will go further, but it needs a small pause. When you come back, you can take it further!"
Du Xingyu recalled his first experimental project on the science and technology simulator in college, which said "interstellar age".
Until now, this experiment has not been completed, or has just begun!
"This is the journey you must go through," said the technology simulator. "One day, when you have high-dimensional technology, you can freely travel through parallel time and space. Every super technology civilization will become your help!"
"Do you want to do this?" Du Xingyu, who has been decisive, is tangled at the moment. This is not a trip to a new city, a new planet, but a new time and space!
What will happen in the new time and space? When you come back, is the world still like this? Will the people he knows still be there?
If he doesn''t go, he may not see the day when humans go to other galaxies, and he will die because his life span has come to an end!
While Du Xingyu was thinking, he suddenly received an urgent message. It is a department specializing in the science and technology of marine civilization. They have found something very important.