Wandering Spaceship in Deep Space Chapter 14: As long as you can learn, it’s done

　　 The construction of the "Earth Age" consumes 2.07% of human GDP every year. After so many years, the total cost has reached 159 trillion federal currency!

　　 This is an extremely huge number. Of course ordinary people are unwilling to do so over time.

　　 You know... Many people on earth are still eating dirt!

　　 Li Cheng sighed again: "The Deep Space Foundation has to prepare at least trillions of funds to lay a light path for the Earth Age."

　　"In the next 20 years, the Jupiter Industrial Base will at least collect a large amount of nuclear fuel, and its fusion energy will be used to launch long-range lasers..."

　　 Zhang Yuan nodded, thoughtful.

　　Earth Age, using the dual propulsion model of light sail and nuclear fusion propulsion.

　　光帆, refers to light pressure propelling. When a photon hits a smooth surface, it can change the direction of motion like a ping-pong ball bounced off a wall, and give the hitting object a corresponding force to propel the spacecraft.

　　 However, the compaction of sunlight is too small to quickly propel a giant spaceship of ten million tons. Only large artificial light sources from the Moon and Jupiter base can generate enough pressure to propel it.

　　Think about it, although the nuclear fuel on Jupiter is inexhaustible, it still requires labor costs.

　　 In addition, this optical path needs to be continuously fired for 20 years. There are hundreds of thousands of laser transmitters, and they have to be replaced continuously. This is another huge amount of money.

　　 It is hard to imagine how Professor Qi Yuanshan, the "father of nuclear fusion", persuaded shrewd businessmen and scheming politicians at the beginning.

　　Deep space colonization, this ultra-large-scale project has no benefits at all.

　　Even for hundreds or thousands of years, it is impossible to generate any benefits.

　　 This is very strange.

　　 After chatting for a while, Li Cheng also found it a bit boring to talk about these things with juniors: "Is there a sufficient budget? It is a question that the top boss should consider, and you don’t need to take care of it. It’s enough to do yourself well. Up."

　　 He shook his head, as if thinking of something, he stopped eating. He got up from the dining table, walked into his study, and thought to himself what the problem was.

　　 Although Zhang Yuan was very curious about the gossip in this regard, he could only give up when he saw this scene.

　　 After eating, Zhang Yuan complained privately: "Your dad and my dad are really alike, they are workaholics. Suddenly I have some inspiration, and then I get excited and busy recording. Don't do it at this time. Disturb him, otherwise it will be an angry meal, or something inexplicable."

　　 "I said yes!"

　　 Li Zhendong agrees very much: "Remember when I was a kid, I asked my dad why 1+1=2, do you know what he said? He even told me about Piano's axioms. I was still in kindergarten at that time. I wonder if he has common sense!"

　　 "Has your sister been educated like this?"

　　 "Yes."

　　 Li Zhendong exaggeratedly said: "One time, my sister asked him why the area of ​​a rectangle is long and wide. He directly talked about some incomprehensible things such as European-style space and inner product. Fortunately, my mother is a Normal people, otherwise he will have to be mentally disabled."

　　 Zhang Yuan also laughed, and then recalled his father's weird style.

　　 At that time, he was playing Rubik's Cube on the sofa. Suddenly, on a whim, the old man had a group theory with a seven or eight-year-old kid.

　　 Yes, group theory. Gavaro spent the whole night writing the paper.

　　 "It's just mathematics five hundred years ago, it's very simple. If you learn this, the kids will look at you with admiration!"

　　 Zhang Yuan was so happy: "I want to learn, I want to learn!"

　　"...The group formed by all operations is called the Rubik’s Cube group. Obviously, the Rubik’s Cube group is a non-Abelian group...If it can be decomposed into the product of simpler subgroups, then each subgroup is constructed The generator of, can prove its solvability. It has been proved that all Rubik’s Cubes can be solved within 20 steps."

　　 During this process, Zhang Qiming was excited and fully enjoyed the pleasure of being a teacher.

　　 But in the end, he found his son and seemed to look at him blankly, not understanding.

　　 Can’t understand?

　　 Zhang Qiming uttered a vulgar sentence: "What a... fool!"

　　 I don’t know if I’m talking about my son or myself.

　　 Zhang Yuan sighed, these past events, in reminiscences without the resistance at the time, are rather nostalgic.

　　 It's been 3 years since my father's death, right?

　　 Time flies, one eye is opened, one is closed, three years have passed, the dead are gone, and all that is left is nostalgia.

　　 Seeing that Zhang Yuan was not in a good mood, Li Zhendong turned on the TV and tuned to the children’s channel. There was a cartoon on it-"Wolf-Haunted Bears Turned into Sheep".

　　 "Don't think I am a bear..."

　　 is a childish cartoon, but the little girl next to it is very happy.

　　 Zhang Yuan asked again: "You are gone, don't your parents feel bad about it?"

　　 "Don’t feel bad, don’t you still have a younger sister?" He pointed to a teenage girl next to him, and said nonchalantly, "You can regenerate a few in the future. Anyway, now that technology is advanced, Give birth casually and can afford it."

　　 He continued: "Think about it, if I don’t get on the spacecraft and stay on the moon to work~ IndoMTL.com~ I go home once a year during the Spring Festival, and spend three days with them every day for two hours... 60 years. , And only 360 hours of company time......"

　　 "Now, I stay at home every day to eat and drink, and spend seven or eight hours with them every day, which adds up to more than two hundred hours a month. The entire vacation spends most of my life with me. What regrets?"

　　 Zhang Yuan scratched his head, what kind of **** logic is this?

　　 However, it sounds reasonable...

　　 Mother Li smiled and cut them a little fruit. She seemed to have gotten used to Li Zhendong’s neurotic remarks, "Zhang Yuan, don’t go back today. Let’s live in our house. There are still rooms available anyway."

　　 "Hmm."

　　 Zhang Yuan nodded and sighed in his heart.

　　 Li Zhendong’s situation is very similar to him, but the difference is that his parents are alive and his family is happy.

　　 And Zhang Yuan is the product of IVF. The sperm is provided by the father, and the eggs are from an unknown female donor in the human gene bank. Up to now, he doesn't know who his blood mother is, and there is no need to know...

　　 But, who doesn’t like having a kind mother?

　　When they were in college, the grades of the two were similar. However, Li Zhendong is a student of God, playing jokes, and still has a score of more than 90 in the exam; while Zhang Yuan is just a student who needs more effort to get good results.

　　 This is actually an intellectual gap...

　　 But it’s okay!

　　 just thinking about it, Zhang Yuan took out his phone and started to use the "Super Brain" app. When I saw those mathematical symbols, a strange sense of happiness came up in my mind.

　　 There is no need to envy others, learning makes me happy, learning makes me grow!

　　As long as I can learn, I will own the world!