Chapter 14

The construction of "earth times" consumes 2.07% of the GDP of all mankind every year. Over the years, the total cost has reached 159 trillion federal dollars!

This is an extremely huge number. For a long time, ordinary people certainly don't want to.

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

Li Cheng sighed again: "the deep space foundation has to prepare at least trillions of funds to pave a path of light for the earth age."

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

Zhang Yuan nodded, thinking deeply.

The earth times adopts the dual propulsion mode of light sail and nuclear fusion.

Light sail refers to the push of light pressure. When photons hit a smooth plane, they can change the direction of motion like a table tennis ball bouncing back from the wall, and give the hitting object a corresponding force to propel the spacecraft.

However, the light pressure of sunlight is too small to quickly promote a giant spacecraft of tens of millions of tons. Only large artificial light sources from the moon and Jupiter base can generate enough pressure to push it.

Think about it. Although the nuclear fuel on Jupiter is inexhaustible, it still costs manpower.

In addition, this optical path needs to be launched continuously for 20 years, there are hundreds of thousands of laser transmitting devices, and they have to be replaced continuously, which is another huge fund.

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

Deep space colonization, this super large-scale project, has no interest at all.

Even hundreds of years, thousands of years, can not produce any benefits.

This is strange.

After chatting for a while, Li Cheng also felt that it was a little boring to talk about these things with the younger generation: "whether there is enough capital budget is a problem that the top leaders should consider, and you don't have to worry about it. It's enough to do your own. "

He shook his head as if he thought of something and stopped eating directly. He got up from the table, went into his study and thought for himself.

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

After dinner, Yuan Chang privately Tucao: "your father and my father really make complaints about workaholics. Suddenly I had some inspiration, and then I got up and was busy recording. Don't disturb him at this time, otherwise it will be angry or inexplicable. "

"Yes!"

Li Zhendong agreed very much: "I remember when I was a child, I asked my father why 1 + 1 = 2. Do you know what he said? He even told me about the piano axiom. At that time, I was still in kindergarten. I doubt whether he has common sense! "

"Has your sister ever been educated like this?"

"Yes."

Li Zhendong said with exaggeration: "once, my sister asked him why the rectangular area is long by wide. He directly talked about some unknown things such as European Space and inner product. Fortunately, my mother is a normal person, otherwise he will have to cripple her. "

Zhang Yuan also laughed and recalled his father's strange style.

At that time, he was playing magic cube on the sofa. Dad suddenly had a whim and talked about group theory with a seven or eight year old child.

Yes, group theory, the paper that gavaro spent all night writing.

"It's just mathematics 500 years ago. It's very simple. If you learn this, the children will look at you with new eyes! "

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

"... the group composed of all operations is called the magic cube group. Obviously, the Rubik's cube group is a non Abelian group... If it can be decomposed into the product of simpler subgroups, and then the generator of each subgroup can be constructed, its solvability can be proved. It has been proved that all Rubik's squares can be restored within 20 steps. "

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

But in the end, he found his son, who seemed to stare at himself and couldn't understand.

I cannot understand you?

Zhang Qiming uttered a rude remark: "what a... Fool!"

I don't know whether I'm talking about my son or myself.

Zhang Yuan sighed. When he recalled these past events, he did not have the resistance at that time, but missed them very much.

It has been three years since my father died, hasn't it?

Time flies. As soon as you open your eyes and close your eyes, three years have passed. The dead are gone, leaving only nostalgia.

Seeing that Zhang Yuan was in a bad mood, Li Zhendong turned on the TV and tuned it to the children's channel. There was a cartoon playing on it - "the wolf haunts and turns into a sheep".

"Although I'm a bear..."

It's a childish cartoon, but the little girl next to it was very happy.

Zhang Yuan asked again, "don't your parents love you when you're gone?"

"I don't feel bad. Don't you have a sister?" He pointed to a teenage girl beside him and said heartlessly, "it's OK to have a few more in the future. Anyway, now that science and technology are developed, we can afford to give birth casually. "

He continued, "think about it, if I don't get on the ship, I'll stay on the moon and work. Go home once a year during the Spring Festival for three days each time and accompany them for two hours every day... In 60 years, the time of accompanying them is 360 hours... "

"Now, I stay at home eating and drinking every day and accompany them for seven or eight hours every day. It adds up to more than 200 hours a month. The whole holiday has spent most of my life. What's the pity?"

Zhang Yuan scratched his head. What nonsense logic is this?

However, it sounds reasonable

Mother Li smiled and cut them some fruit. She seemed to be used to Li Zhendong's neurotic remarks. "Zhang Yuan, don't go back today. Live in our house. There are still empty rooms anyway."

"Yes."

Zhang Yuan nodded and sighed in his heart.

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

He Zhang Yuan is the product of test tube baby, the sperm is provided by his father, and the egg comes from an unknown female donor in the human gene bank. Up to now, he doesn't know who his blood mother is, and there's no need to know

But who doesn't like having a kind mother?

In college, their grades were similar. However, Li Zhendong is learning from God and playing around. He still scored more than 90 points in the exam; Zhang Yuan is just a bully and needs to make more efforts to get good results.

This is actually a gap in intelligence

But it doesn't matter!

With that in mind, Zhang Yuan took out his mobile phone and began to brush the "Super Brain" app. A strange sense of happiness rose from my mind when I saw those mathematical symbols.

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

As long as I can learn, I have the world!