As a member of the scientific research team, Zhang Yuan was the first to land on Europa.

He walked carefully down the space elevator and walked on Europa's ice sheet. Only a few lights flickered in the dark sky. These permafrost layers have never melted since they appeared, and have a history of at least one billion years.

Look up and you can see Jupiter everywhere.

It is really overwhelming. Its area is about 23.5 times that of the earth when witnessing the moon. With the naked eye, there are wood like lines on the surface of Jupiter.

Sometimes I can see the famous dark red erythema, just like a huge eye, watching them quietly.

If some people who are afraid of ghost stories see this round of real blood moon, they may be scared to death alive.

Zhang Yuan took some photos with great interest.

The reason for choosing the tidal locked side as the base is that this place is less likely to be attacked by meteorites.

Jupiter, the big guy, cleaned up countless meteorites for the inner planets of the solar system. With Jupiter as a shield, the probability of the earth being hit by meteorites is much lower, providing a more favorable environment for the formation of life.

But Europa is not so lucky. Living here, the probability of being hit by meteorites has greatly increased.

The whole base is also equipped with the most powerful helium-3 nuclear bomb to resist possible meteorites. No way, who makes Jupiter the most important nuclear fuel bank?

"Welcome to Europa industrial base, friends from afar. The edge of human space deployment. " A middle-aged man in a space suit stood at the gate of the base and greeted everyone with a smile.

Then he shook hands with the captain.

Academician Ding turned back and said to Zhang Yuan, "let's go. This alien base may be similar to our future deployment... We should have a good visit."

"I have some old friends here who want to visit. Would you like to go with me or move freely?"

Zhang Yuan thought, "I also have an elder who wants to visit. Let's move freely for the time being! "

"See you in the afternoon."

The first thing Zhang Yuan did when he entered Europa base was that Meimei had a barbecue meal!

The smell of barbecue made him drool and saliva. It was like doing a math problem!

Even if it doesn't taste like a big meal on earth, it's not synthetic meat at all.

Europa base, compared with the take-off ship, is simply heaven!

"Good, really good! You solved the turbulence problem! " The middle-aged man sitting opposite him was his father's former colleague, thumbed up and praised him.

"Uncle yuan, it's just luck. A numerical simulation method, in fact, has not completely solved... "Zhang Yuan smiled shyly.

"Luck? Rely on strength! You think I don't know? There are many applications of turbulence, from astronomy to geography. Look at Jupiter, the big red spot, isn't it formed by turbulence? By the way, what time does the meeting start? "

"About one o'clock in the afternoon." Zhang Yuan replied.

"Then you can rest for a while."

They were invited to Europa to attend an industrial academic conference.

There are many existing achievements in this base, which are the crystallization of human wisdom and worthy of reference.

The large buildings inside the ice sheet are actually very exquisite. Various heat dissipation, support, sewage and other structures need to be planned as a whole. In particular, the heat emitted should not exceed the bearing capacity of the whole ice sheet, otherwise too much ice will melt, which may lead to landslides, earthquakes and other malignant accidents.

Europa, as a relatively successful immigrant planet, will certainly benefit from field trips and learning more new things.

"Uncle yuan, when are you going to return to earth?" Zhang Yuan patted his stomach with satisfaction and asked again.

"It will be three years in three months. I will never come to this ghost place again. I can't live video, and I haven't seen my son and daughter for a long time. The muscles also began to shrink. If you don't go back, you will have to bear a green grassland on your head. "

"How can I..." Zhang Yuan quickly made a ha ha.

Europa produces the most important resource of a civilization - energy. So here is equivalent to the former Middle East, and the salary must be top.

Ordinary workers have a work cycle of about three years.

Even the lowest level posts can earn millions.

However, being far away from the center of civilization, although you have money, you can't enjoy it, and you can't take care of your family, so you must take some risks... All kinds of shit go down the stove and work hard to make money back. As a result, you find that there are countless stories of wearing a green hat.

"What else do you want to bring back to earth? I can be a courier for you." Uncle Yuan said with a smile.

"Well..." Zhang Yuan thought, "do you have a postcard? I'll just send back some postcards. "

"OK, there are just a few more. Here you are."

After thinking for a while, Zhang Yuan wrote several letters to Wang Lili and Xu Yunjing, Professor Wang Zhong, her sister-in-law's family and Han ziyue.

Very brief, about their recent experiences and feelings.

When writing Han ziyue's letter, Zhang Yuan was stunned. He didn't know what to write.

"Why, it's a girl?"

"Ah, a lovely girl. I don't know what's going on now. "

"Well..." Uncle yuan smiled as if he understood.

What do you write?

Zhang Yuan had an idea. He drew a picture of himself on the postcard. There was a planet floating in the sky, that is, Jupiter.

His sketch level is not very good, but he has simply studied with the painter Elvin. The whole portrait looks crooked, much uglier than himself.

However, because of its ugliness, it seems to have an inexplicable sense of humor.

Sign your name below.

[Zhang Yuan, 2265.8.31]

I have no chance to accompany you all the way, no excuse to talk with you all night, and no chance to tell you my current life. I can only send a postcard to tell you that I'm fine. It's better to miss meeting you.

Cherish each other.

Zhang Yuan sighed slightly in his heart.

Finally, he left one for himself.

Consider it carefully and write on it: [today, we come to Europa, the outermost industrial base of mankind, where the mother ship will make the last replenishment of resources. Europa is not comparable to the earth, but it is more secure than the spacecraft. After all, it is a planet.]

Next, we will go to the distant starry sky. I don't know when we can reach another planet

[it's a long night. I don't know the road ahead. I hope we can remember this beautiful and gentle day in the future.]

【2265.8.31】

It's written and inexplicably heavy.

Zhang Yuan raised his head and said, "I'll keep this one myself. After you return to the earth, just put it into the mailbox for me."

"OK, this little thing. See the outside world! " Uncle yuan put away the stack of postcards and nodded solemnly.

"Thank you! I'll go first. "