Xu Jiawei tried to get his father's consent, so he tried his best to guide his father to the train of thought he needed, and when he vaguely revealed his thoughts, his father was taken aback: "What do you mean, you are going to rescue?"

"It's not me, it's us. But it's not finalized yet, and it's hard to say if I'll get my turn or not, unless I'm one of the best people in the world. ”

"No way!"

"Dad, didn't you agree, why did you regret it before you finished speaking?"

"My premise is that I can return in my lifetime, and with the current technology, I can't return so soon. Without this premise, of course I disagree. Dad said seriously.

"Dad, it doesn't take so many years, aren't there stars in the universe, there are many stars with a gravitational force of more than 100 light years, and black holes, the gravitational force is amazing, these are all accelerations that we can use. That's a lot of money, not to mention that there are wormholes that have been speculated for more than a thousand years that may really exist, and if so, it would be impossible to find a wormhole, as well as the gravitational sources that I guessed existed in the universe. Combined, these acceleration factors are not impossible to come back in their lifetimes. ”

Dad touched his forehead and said, "I don't think my mind is hot, your story is told so perfectly, this possibility only exists in fantasy, not necessarily in reality,"

"Dad, you are so right, 'not necessarily', this shows that you are not completely denial, in the end it is the teacher who teaches astronomy and geography, which means that although you disagree, Dad, you are not against it. Haha, dad thank you. Xu Jiawei said happily. He already felt that his father was not very opposed, so he would focus on his mother's difficulty.

"Did I say that, boy. You behave better for me at dinner in the evening. Dad said with a smile.

"Yes, yes, I must listen to Dad, I will behave well and will not disappoint your students. ”

"That's what you said, and what you've said is a nail in the coffin. Dad smiled mysteriously.

It's time to eat, my mother saw that Jia Wei's clothes hadn't changed and talked and laughed with my father, and I was unhappy for a while, but the guests had arrived, and she couldn't say anything, so she beckoned everyone to sit down.

Xu Jiawei saw that the visitor was his father's schoolgirl, with long hair and a shawl, quiet and elegant, and nodded to her. When she saw Xu Jiawei, she also smiled and nodded. Mom introduced: "Jia Wei, get to know this girl, this girl is Cai Qingqing, a teacher from Luqiao Middle School, who used to be your father's student. ”

Cai Qingqing stood up very politely, stretched out her hand, and said, "Please take care of me, senior brother." ”

Xu Jiawei also shook Cai Qingqing's hand politely and said, "How dare you, my name is Xu Jiawei, please sit down." ”

Mother Li Jiejing looked at the seat always a little awkward, oh, it turned out that the seat was adjusted, and said, "Jia Wei, you change positions with Dad, so that it is convenient for you to talk to Teacher Cai." ”

"Oh, yes. Ha ha. Dad smiled and stood up.

"No, I can hear my brother speak. Cai Qingqing said with a smile.

"Jia Wei, have a good chat with Mr. Cai, Mr. Cai teaches middle school astronomy, and there are some questions that need your help. ”

"Mom. You have to let Mr. Cai eat well, don't talk about work during dinner, let's talk about it after dinner, if there is any problem, Mr. Cai can ask me, as long as I understand without reservation. Xu Jiawei said with a smile.

"Then thank you, brother. ”

"Yes, yes, eat first, look at me, just be happy, rude. Li Jiejing said.

Xu Jiawei seems to realize that his mother is introducing him to someone, in all fairness, Cai Qingqing is a girl who has a lot of eyes for herself, and she looks comfortable at first glance, if she doesn't have a bigger mission, she is very willing to associate with her.

"Brother, don't you drink some wine?" Xu Jiaxuan said.

"I'll have to communicate with Mr. Cai later, and my thoughts will not be clear after drinking. Xu Jiawei said, "Teacher Cai, drink a little." ”

"Thank you, brother, I won't. Cai Qingqing smiled.

"Does Teacher Cai have a lot of homework at school?" Xu Jiawei used chopsticks to clip a piece of fish meat for Cai Qingqing.

"Thank you, brother. 12 sessions per week, which is not bad. ”

"It's not very busy, but you teachers don't have a strict distinction between going to work and leaving work, and you work at home. Xu Jiawei said.

"Yes, my brother often sees teachers working from home, right? Mr. Xu is a very dedicated teacher and a role model for me. Cai Qingqing said.

"In this way, Mr. Cai is also very dedicated. Xu Jiawei said with a smile.

"Senior brother smiled, I'm not as good as Mr. Xu. ”

"Qingqing was the best student in our class back then, especially in astronomy, and she was no worse than Jia Wei in middle school. Dad said.

"Teacher Xu praised me, how can I compare to my senior brother, my brother's paper in middle school has attracted the attention of scientists, and I can't reach it. ”

"Where, my thesis is actually very superficial, it's just a fluke to the appetite of experts, and I am ashamed to be so praised by Mr. Cai. Xu Jiawei said.

"Senior brother, I heard that you are now working at the Jinshan Astronomical Research Institute, which is a heavyweight astronomical research institution in China, and ordinary people can't get in. ”

"You mean outsiders aren't allowed in, right?" In fact, Xu Jiawei knew that Cai Qingqing didn't mean this.

"No, I mean, people who aren't very good can't get into this institute. Look at my clumsy tongue and can't express it clearly. ”

"No, no, no, it's me who understands it. My main research direction in the institute is the galaxy resources of outer space, and it is very boring to be either in the office or in the laboratory every day, but fortunately you chose to be a teacher at that time and did not do research. ”

"Where, I would like to do research, but I am not ambitious. ”

"I can't say that, I was very envious of my father when I was a child, and I used to want to be a teacher, but I started researching by mistake. ”

"Senior brother, outer space must be very exciting, have you found extraterrestrial life?"

"So far, we haven't, but last few days we found signs of life on Proxima Centauri's planet 2, and I'm going to go up and take a look. ”

"Go up, go to outer space?" Cai Qingqing looked at in surprise.

"That's right, one of our spacecraft arrived at 3 kilometers of the planet and detected some interesting phenomena, there was oxygen under the atmosphere, there were mountains and valleys on the planet, there were rocks moving by the wind, there was sunlight, the temperature was 30 degrees, and there seemed to be water. This planet is very suitable for life. Xu Jiawei said.

"It's kind of interesting, it's just that it's too far, Proxima Centauri is 4.22 light years away from us, how can you go up?" Cai Qingqing said.

"Brother, there is such a romantic place in this space, take me with you when you go. Xu Jiaxuan was influenced by his family and was also an astronomy enthusiast.

The mother glanced at her youngest son and said, "Teacher Cai is communicating with your brother, they are talking about work matters, what are you doing wrong?" ”

"Hehe, master, it's okay, junior brother can also join us in the discussion. Senior brother, based on these, you can preliminarily judge that there is life on it?"

Xu Jiawei said: "The only thing that is uncertain now is that it is not clear whether there is water in the video sent back by the spacecraft, so I want to go up and investigate it myself, and if there is water, I can basically confirm that there is life." Of course, life over there is only life, not people in the sense of the earth, and their life forms, lifestyles, etc., may be different from the earth. ”

"Well, what kind of environment creates what kind of life, and the creatures on the earth also evolved slowly, and it is closely related to the environment in which they live. Cai Qingqing said.

"Natural selection for the survival of the fittest. Xu Jiawei said.

"Well, have you assessed the risk of going up? If the creatures over there are very powerful, they will be aliens after you go up, and it is not impossible to catch an alien to study them. Cai Qingqing said with a smile.

"It's still far from really going up, now it's just my personal assumption, if you really want to go up, all aspects of preparation must be done safely, there is a lot of research work to do, I won't just go like this, after all, the first time to go to outer space, there are too many uncertain factors. ”

"Yes, it's very mature to travel in the solar system now, and there is no risk even if you go down to a gas planet. Outer space, too far away, seems out of reach. Cai Qingqing shook her head and said.

Xu Jiawei said: "It's not too far here, and now we have a spaceship with 10 times the speed of light, and we can reach it in three or four months, so it's very convenient to go back and forth." ”

"Senior brother is very serious about academics, he wants to go such a long way in person, and space is full of risks, and there are too many unknown things. Cai Qingqing said.

"It's really not that far from here, and I'm going to go to the end of the sky......"

"What, what, what is the end of the day?" her mother, Li Jiejing, was taken aback and couldn't help but interrupt her son's words.

"It's 15 billion light-years away, and we find two prehistoric humans trapped there, ready to come back. Xu Jiawei said.

"Gavi, you're crazy, 15 billion light years, it's a journey with no return. No, resolutely no, I don't agree. Mom said.

"Senior brother, even if you can reach such a distant place, when you arrive, you will become the next generation of prehistoric humans, just like the two at the end of the sky you just said. If you can come back, by the time you come back, another generation of prehistoric humans will have passed. It had been several generations of humanity when you returned to Earth safely. ”

"Ha, then I am a person of several generations of prehistoric humans, and the emperor is only long lived, but I am a billion-year-old person, better than the emperor hundreds of millions of times. ”

"Teacher Cai, don't listen to his nonsense, how is this possible. Mom said.

"How is it impossible, if it is officially approved to go to the rescue, I will definitely be selected on my terms. ”

"What do you say, once it's officially approved? That means it's just an idea now, and it hasn't been approved yet, so it's not certain that you agree to go to the rescue?" Mom frowned.

"Yes, but I think it's going to be approved, because it's a matter of human life. ”

"That's right, human lives are at stake, you go out to say that you will take some more human lives, only fools will approve it. ”

Xu Jiawei gasped, and his mother's words immediately extinguished his original passion. He put down his chopsticks and left the table, he thought, what his mother said was not unreasonable, why didn't he think of this.

"Senior brother, what's wrong with you?"