In April 2031, the information collected by the digital city was carefully checked by Nana, showing that the city of paradise on Europa has a population of 50,000 and a GDP output value of 50 billion, and the main industries include the combination of space tourism and real estate brought by the resort of the underground ocean, as well as the seafood aquaculture industry that has begun to take shape.

However, I believe that by the end of the year, the GDP figure will instantly soar to more than 150 billion, although it is a rather eye-catching number, because of the investment of more than 500 billion in the early stage, resulting in at least 3 years, the world paradise city does not want to turn losses into profits, or have to honestly accumulate strength and develop with peace of mind.

Cao Chuan traveled to Jupiter in May 2031. Before, he had never set foot on this planet for half a minute, in his impression, Europa was a beautiful planet, nothing more, when his feet stepped on this land, and saw the vast white ice surface of Ganymede, the planet gave him a feeling that became real and a little more charming.

This also leads to the fact that from the perspective of economic interests, building underground cities is the most rational choice, and he still feels a sense of regret when he sees their cities hidden in the dark underground, and the immigrants here have no way to appreciate this white world all the time.

Then he saw the underground ocean under the control of the East Galaxy Company, considering that the ocean was too dark and would become unsightly, so the staff in charge of Jupiter's development came up with a good idea, not only installed dense starlight lighting on the dome, but also buried huge scattered light sources in the depths of the sea, standing on the shore and looking into the distance, it seems that the whole ocean will glow, making this a very attractive attraction for tourists.

"It looks like the underground world is also very attractive." He sighed, decisively overturned his previous thoughts, and returned to the main city, and after admiring the remaining Jupiter pioneering achievements, he held a simple commendation meeting, and issued corresponding merits to the outstanding employees of several major departments in the past six months, with a few tens of thousands, and even more than 1 million, with a total of nearly 30 million merits.

He took a spacecraft non-stop to Jupiter's atmosphere 1 million kilometers away, where it was still unexplored, and the employees of the exploration department and the research department built a simple space station with an area of 5,000 square meters early, waiting for his guidance.

The Queen Nana is moored next to the space station, and the spacecraft is almost the same size as the space station, so Cao Chuan is worried about whether such a small space station can really carry a series of exploration and research work in the future?

"Please rest assured, Mr. Advisor, the main reason is that the construction of Paradise City outside the world does not have too much manpower, which has caused the construction progress of the space station here to be delayed, and it will be better later." Xu Bochen of the exploration department explained to him with an embarrassed face, and told him that in the next month, the scale of the space station will be expanded by at least 10 times, reaching 50,000 square meters, and it will truly become the atmosphere laboratory they expected.

"In that case..."Cao Chuan is not a nitpicker, he is just complaining every day, he blinked: "Let me make confirmation." ”

With the inspection of all the problems that may affect the future plan so far, it can be said that in addition to the three technologies such as deuterium-tritium fusion energy technology that I promised, the remaining ones are not particularly difficult, and it takes a little time, and there is always a way to solve them, or find a clue.

For example, there is a way to keep the space station 2,000 kilometers outside Jupiter's atmosphere, without being affected by high-altitude Jupiter storms.

For example, the spacecraft modeled after the gas ore collection spacecraft popularized in the asteroid belt will fly deep into Jupiter's atmosphere to find a way to collect high-density hydrogen-helium mixtures, turn them into a liquid state through cryogenic storage, and transport them back to the space station for manufacturing.

For example, to find out whether there will be a rich mine with weak storms and dense helium-3, deuterium, and tritium in Jupiter's relatively evenly distributed atmosphere, so as to make them more efficient.

The list goes on and on, and even though the research department has made so many small achievements, it is not worth mentioning compared to the deuterium-tritium fusion energy technology that Mr. Consultant is about to show them, and the only reason for existence is to pave the way for the realization of deuterium-tritium fusion energy technology.

Think about it, although the energy efficiency of deuterium-tritium fusion is similar to that of helium-3, in terms of distribution, helium-3 is in nature on the minus 6th power of 10, deuterium is on the minus 4th power of 10, and tritium is minus 15 to the magnitude of 10.

So the conclusion is that the total amount of deuterium-tritium is 100 times more than that of helium-3.

Even if the energy consumed by future spaceflight is definitely not 100 times more than enough to make up for it, even if there is more light pollution than the clean and pollution-free helium-3, in Cao Chuan's view, the indispensable reason for deuterium-tritium fusion energy technology is to make a transition for more technology tree derivatives in the future.

Under the researcher's expectant gaze, he showed the drawings, "What is in front of you is a prototype of a deuterium-tritium fusion energy reactor. As the drawings show, its scale is more than 500 meters long, wide and high, and it is necessary to build an independent space station to carry it, and the advantage of such a large size is that it is easier for us to constrain its reaction speed, scope of action, and in terms of what direction we should optimize such a scientific problem. ”

What Cao Chuan didn't say was that since he had regular simulations, he would definitely not simulate the technology to this extent, think about it, if the deuterium-tritium fusion energy reactor can't be stuffed into the spacecraft, what a tangled thing is this? The reason why he came up with a plan that was not the most perfect first was that he didn't want the employees of the research department to rely on him completely.

Let's build a prototype of a deuterium-tritium fusion energy reactor first! Cao Chuan suggested. Xu Bochen did not expect to see the second leap in fusion energy technology in his lifetime, and he originally wanted to participate, but he was ashamed to devote all his energy to the work of the exploration department over the years, ignoring the upgrading of the original professional skills, and finally did not join.

In orbital space, 100 kilometers away from the Jupiter space station, there is now a separate space station structure, and after the efforts of nearly 100 employees in the research department, the new deuterium-tritium fusion energy reactor is ready.

The raw materials deuterium and tritium have been refined in sufficient quantities to be consumed at any time, and then they are checking the performance parameters of the reactor, through this large-scale spatial constraint, the center of the fusion energy can withstand a more violent fission reaction, so that the temperature rises to 100 million degrees Celsius, such an ignition condition, to start the fusion reaction of deuterium and tritium.

As for the outer walls of the reactor, graphene is also used, as well as a number of unknown high-performance materials discovered by humans during the exploration of the planet, which ensure the strength and high temperature resistance, and prevent the impact of fusion energy from affecting the outside.

The ignition was unsurprisingly successful, and the amount of electricity generated by such a large reactor was terrifying, easily reaching 25 million kilowatt hours, enough to sustain the entire power consumption of a megacity.