Zhang Yuan kept coming to the railway station.

    A message is displayed on the mobile phone: "[Dahua transportation] Dear passenger Zhang Yuan, your ticket has been paid successfully at 10:03. Train number g888, second class seat, Donghua (10:30) - Xisha (11:45), ticket No. 781234... "

    It was almost time. Zhang Yuan boarded the train and found his seat.

    A soft electronic sound sounded in the carriage: "this train is bound for Xisha for an hour and 15 minutes..."

    The gray and black sea crossing bridge is like a long dragon lying on the sea. Modern carbon nanotube materials can even handle 36000 kilometers of space elevators, not to mention the small sea crossing bridge on the ground.

    These bridges can easily withstand a 16 level typhoon.

    The traditional means of transportation, aircraft, will be eliminated. Fuel is not a big problem. Hydrogen fuel can be used to replace traditional fossil fuel, but the carrying capacity and operating cost of aircraft cannot be compared with maglev train.

    In addition, the speed of maglev train is close to that of aircraft, the ticket price is cheap and comfortable, and there is no tinnitus problem caused by air pressure, so the aircraft gradually loses its competitiveness and is on the edge of elimination.

    An hour later, several fuzzy shadows finally appeared on the blue sea level, which was the fusion nuclear power plant.

    The fusion nuclear power station at sea is 300 meters high. Because of the huge heat dissipation, the surrounding white fog is all transpiration steam. The distilled water will be collected and supplied to the city.

    Xisha aviation city, located in the southernmost sea area of Xia state, had territorial disputes with surrounding small countries hundreds of years ago. Various accidents of detaining fishing boats, wiping guns and getting on fire often occur.

    However, with the development of the times and the progress of society, with the rise of Xia state, all these shit disputes have become floating clouds.

    "Controlled nuclear fusion is really a good thing. How much can 3 cents per kilowatt hour electricity be used for industrial production? Other countries still play an egg? "

    Nuclear fusion power plants have a less wonderful feature: the larger the nuclear power unit, the more stable it operates and the lower the cost of power generation. In addition, due to the limitations of human technology, there is no way to miniaturize nuclear fusion devices. Therefore, every nuclear fusion power station is like a small mountain.

    Nuclear fusion and the space economy have made Xia the first country to eat crabs, making a lot of money. Therefore, it''s OK to leak some soup for the younger brothers around. Territorial disputes have long disappeared. Those who get more help and those who lose help less. Interest is the closest link between countries.

    The train sped past the nuclear power plant.

    "Look, look! It''s a space elevator! "

    "Where?"

    "That''s the one... As thin as hair."

    Squinting, you can vaguely see a slender column towering sea of clouds, just like a kite line.

    In the sunlight, there is a bright sense of unreal.

    High.

    Too high

    Many people who saw the space elevator for the first time couldn''t help lying on the glass window and taking photos.

    The legendary "Babylonian tower", a miracle in history, has a total of 17 on this planet. In the next 30 years, it is expected to increase to more than 30 seats.

    Xisha aviation city has the first space elevator "Tengyun" in human history. Its geographical location is about 300 kilometers from the equator. Keeping the space elevator at a small slope can make the most of the earth''s rotation force, so that the elevator has greater carrying capacity.

    After nearly 100 years of development, Xisha has become an international big city.

    "Won''t it collapse?"

    "How is that possible? The principle is different. The space elevator mainly depends on tension, not pressure. Do you understand the tension of the rope? "

    "Will terrorists hit this tower?" Those who have good deeds open their brains and think nonsense.

    "... it is said that attacking the space elevator is equivalent to launching a nuclear war and will be subject to reciprocal retaliation. Xisha city has strict security. There are troops stationed nearby. No planes are allowed to pass... "

    "Brother, are you already in Xisha city? I just saw your circle of friends ~ ~ "

    At this time, my sister-in-law''s daughter ye Qingqing called, "are you going to space? I really want to go on a space tour, but my parents want me to work and study to make money. I can make money by traveling for 30000 yuan... "

    She was almost envious.

    "Space tourism is actually not wonderful at all. I''m serious." Zhang Yuan said with a smile, "let''s work study slowly first. You can''t get a tourist visa under the age of 18."

    It is one thing to apply for a visa and another to obtain a tourist quota.

    The daily cargo volume of space elevator is limited, so there are not many tourist places. If you don''t spend money, you may have to rely on relationships. The worldly sophistication will not be completely eliminated in any era.

    In this conversation, the speed of the train slowly stopped.

    "Dear passengers, the terminal - Xisha has arrived. Please take your carry on luggage and get ready to get off..."

    When the train arrived at the station, the tourists looked excitedly at the space elevator not far away. No matter where they were, they could always see the strong Tianzhu as long as they looked up.

    This great power from science and technology and industry can fully stimulate the national pride of the Xia people. Almost all space elevators in the world have Xia Guoren''s technology and shares.

    With more contact, Zhang Yuan didn''t feel much. He just rented an unmanned motorboat.

    "Wow!"

    The motorboat sailed rapidly in Xisha City, splashing all over.

    Xisha city is like summer all year round, but the temperature in July is less than 30 degrees, which is much more comfortable than Donghua City anyway.

    The city is basically an artificial island. There are bridges between the islands. There are a lot of waterways below. Sometimes you can see some tropical fish.

    Once a leader patted his head and wanted to fill in these waterways and replace them with land roads to improve traffic efficiency. As a result, he was unanimously opposed by the broad masses of the people because... They thought that motorboats were more fun and could attract tourism.

    Facts have proved that the people are really right once. The omnipotent air track has solved the traffic problem, and water transportation has really promoted tourism.

    "Di... This service charge: 16 yuan."

    Zhang Yuan got off the motorboat and came to his destination.

    "I''m an astronaut of the earth times. Can I report now?"

    The service staff of the deep space planning bureau brushed his ID card, smiled and said, "Mr. Zhang Yuan, your holiday still has 19 days. It''s too early. It''s not your turn to launch. "

    "No... I just want to ask, is there a place to live?"

    The service staff smiled and said, "I''m sorry. If you arrive 3 days early, we''ll arrange your accommodation for you. But now, there seems to be no such arrangement. "

    "Maybe you can go to the university next door and see if there is an empty university dormitory. I''ll give you an astronaut certificate. "

    Zhang Yuan frowned. He came too early and was despised. This kind of thing is normal, and the service staff just act according to the rules.

    "All right, thank you."

    "You''re welcome!"

    There are many aviation universities stationed here, some of which are international and recruit students from all over the world. However, because of the summer vacation, most of the students have a holiday, and the university is empty.

    Soon, Zhang Yuan saw the four gilded characters "Xisha University". As they looked more like students, they were not blocked from entering the school.

    Zhang Yuan asked several people before he came to the bottom of an office building, [deep space foundation (Xisha University Branch)]

    "Hello, I''d like to see Wang Zhong, Professor Wang."

    "Do you have an appointment?"

    "... no appointment."

    "I''m sorry, there''s no appointment. Professor Wang is very busy."

    As a last resort, Zhang Yuan could only take out the big killer, the astronaut certificate, and his father''s ID card.

    Although it''s a shame to rely on my father.

    "I''m Zhang Qiming''s son, so I said... Would it be all right to visit Professor Wang Zhong?"

    ----------------------------------------------

    [ha ha, ha ha, I suddenly found that Ben had signed a contract on the street, so I quickly made a bright cover to suppress my surprise.]

    [also, who said I could sign a contract only after 100000 words（ Dog head (dog head)]