On the morning of November 1, 10,000 years agonum, a small cargo shuttle carrying an object and two astronauts set off from its base on the back side of the moon to the Earth's North Pole. Looking at the earth from the space of the lunar orbit, it is not difficult to find that the crystal clear and beautiful earth, which was originally composed of blue water and green earth, has now become a dark red, the glaciers at the poles have long been gone, the rivers and oceans have disappeared, leaving only the land that was deposited by rivers and oceans, revealing the weathered surface everywhere, the original depressive green forests and fields on the ground also no longer exist, the entire ecosystem has been reduced to nothing, and there is a dead silence on the surface, without any trace of life. The water and oxygen content in the air accounts for less than 1% of the entire earth's atmosphere, and the rest of the gases are mainly carbon dioxide and methane, and the temperature reaches more than 50 degrees Celsius. The major cities that represent human civilization are only in ruins, and the high-rise buildings of London, Paris, Sydney, Dubai, Beijing, Hong Kong and other big cities are all left and desolate, and the Great Wall of China, which was once seen in the sky, has been wiped out without leaving any trace on the earth. The Statue of Liberty in the United States has only a weathered head that is unrecognizable, and its body has long been broken into a stump lying on the ground. The wind blows across the surface of the earth, the dust is flying, and now the earth has become a dark red planet that is 90% similar to her twin sister Venus.

After entering the predetermined orbit, the pilot An Ran, who was about forty years old and slightly bald on the top of his head, put on a silver-gray spacesuit on the plane, casually looked at Li Huasheng, the only passenger who was also wearing a spacesuit, and had an elegant appearance, and said: "Brother, you have been at the Yuebei base for more than 3 years, and you have worked very happily. After you return to your home on Earth this time, will you no longer be stationed at the Moon's Back Base? The rhythm of life and work in the moon back base is very regular, and the work and rest are regular, but without you, a good friend, to chat with me, it will be a little lonely! I'm a little disgusted with you."

"Yes, my years of service on the moon have passed, and I will stay on Earth to work and spend more time with my wife." Li Huasheng touched his hair and said in a brisk tone: "The twin children in my family will turn 18 in June next year, and they will be ready to work as adults. As a benefit of working on the back of the month, our family successfully applied to travel to the ecosystem for 3 months. Our whole family is looking forward to it!"

"It's hard to apply for a 3-month long vacation to explore the ecosystem with your family, and it's exciting to think about it! Spent a lot of contributions, right?" An Ran was so envious that his eyes were red, but he was also sincerely happy for his colleague Watson.

"The main reason is that I work all year round at the Yuebei base, and my wife works in shifts at the meat farm, so the vacation accumulated by everyone is converted into a contribution value in exchange for travel opportunities. as a coming-of-age gift for children." Li Huasheng was extremely happy, and his heart was full of a strong sense of happiness, and he was authentic.

"Watson, what will you do on Earth in the future?" An Ran asked curiously.

"I will take a break for a while and then apply for the government's garrison, which is a uniformed force, mainly to maintain law and order in the city, which is my favorite profession, and I hope to be on duty in a city near my home and spend more time with my wife and two children. Two sons and daughters who will turn 18 years old next year, their desire is to serve in the moon base like me! The day of family reunion is really precious, and I hope that this 3-month ecosphere trip will have a good memory for the whole family!" Li Huasheng said melancholy.

The aviation system on the shuttle issued instructions: "Attention! There are still 800 kilometres of shuttles ahead to reach the Arctic airport, so sit tight and fasten your seatbelts, count down to 3, 2, 1 and descend into the atmosphere." Pilot Enron and passenger Li Huasheng felt a strong centrifugal force, but there was no expected burning sensation, and the fuselage only shook slightly, proving that the shuttle designed and manufactured now has a lot of technology compared with the past, and both performance and safety factors have been greatly enhanced.

When you arrive over the North Pole, you don't see the expected snow-white glaciers, only the dark red earth, and suddenly appear in a 6,000-square-kilometer black metal giant cavern, called the "Arctic Airport". The whole cave is surrounded by flickering signal lights, and the center is a large round gate that opens and closes in a ring, and the large round gate of 3,000 square kilometers can be used by four aircraft carriers with a total length of 100 kilometers and a width of 60 kilometers at the same time. Around the large round gate in the center, there are hundreds of small round doors of different sizes, which open and close in rings, each of which can moor a small shuttle 10 kilometers long and 10 kilometers wide. At the Antarctic of the earth, there is an 8,000-square-kilometer "Antarctic Airport" of the same style and shape.

Under the instructions of the channel light, the small cargo shuttle that Enron and Li Huasheng were riding stayed above a small round gate with a diameter of 10 kilometers at the "Arctic Airport", and after the small round door opened and closed, it landed safely on the lifting platform under the small round door. The lifting platform supporting the shuttle descends rapidly and smoothly to the center of the earth, and after about 60 minutes of descent, it finally arrives at the No. 101 small storage bin, the shuttle runs according to the rail, automatically leaves the lifting platform, and moves laterally into the apron of the storage bin, where the goods will be unloaded, filed and sorted by the robot, and automatically stored in a suitable warehouse.

"Colleague, great work! My name is Ari, please come with me to the stress room to rest." The airport consul led An Ran and Li Huasheng into the air-conditioned corridor, stood on the conveyor belt of the corridor, and arrived at a pressure adjustment room full of flowers and plants all year round to rest after about 10 minutes. "Due to the difference in gravity between the Moon and the Earth, and the weightlessness of space during space, you need to adjust here, and after you get used to the pressure of the Earth and go through quarantine, I will send you back to your living quarters." Enron said lightly, "Accustomed to it, this is not our first time traveling, we have already tried to adapt to the different gravity of the moon and the earth. But I've never seen a pressure regulating room so decorated with so many flowers!" Li Huasheng approached the flowers and plants and tried to touch them with his hands, but found that they were just holograms. But even so, standing in this adjustment room, you can really smell the fragrance of flowers wafting by the breeze, the table in the room is placed with fresh fruits, two soft beds, and a tidy bathroom, which is comfortable and warm, it seems that the service of the administrator here is more intimate and humane, An Ran and Li Huasheng are very satisfied. After resting for 24 hours in the pressure regulating room, the airport leader Ali led them to the lowest level of the earth's crust, waiting for the pipeline to connect across the surface and the country in the center of the earth to take them home.