There is not much need for its practical computer to establish a base model, the huge and complex nature of the earth base is only the tip of the iceberg for the Wan Changchun who has entered, and the number they currently have is only a very small part, whether it is the internal situation of the earth base provided by Wan Changchun, or including the overall understanding of the earth base by each group at present, the number is not comprehensive, so this formed model is still very different from the real earth base.

But even so, whether it is Wan Changchun, Lin Dong, and even Tian Lao and others, they still support the work of using computers to build a model of the earth base. Because the advantages of this are also obvious, firstly, it can be tested with the current scientific and technological situation of the earth's civilization, and the real appearance of the earth's base can be compared in this way. Second, I can also train the team through this work and play a "warm-up" role in future work. More importantly, this work is also very useful in providing a reference for the future reconstruction of the earth by drawing on the structure of the earth's base.

The complex three-dimensional model slowly rotated in front of Wan Changchun, and Wan Changchun looked at the model carefully, and it was easy to distinguish some of the places he, Hu Zhijun, and Su Yichen had visited. Although there were a few places he had not touched, the description that Su Yichen had told him inside the base, including some information that Lin Dong had in his hands, had roughly deduced its location.

"It's ingenious, it's good, it's good!" The more Wan Changchun looked at it, the more excited he became, and he couldn't help but admire. At the same time, he thought of the days and nights when they forgot to sleep and eat for the Galaxy project, and in just 40 years, technology has been advancing day by day, which he could not have imagined back then.

However, this base model also has its own major flaws, and some areas are inferential. Its accuracy is unknown, and there are even some areas where inferences cannot be deduced, leaving only a blank space. But Wan Changchun was full of confidence, because as long as Su Yichen was together, with his current mastery of the basic authority of the earth base, it would not be difficult to complete this model.

"How long will it take for Xiao Su to arrive?" Take your eyes off the model. Wan Changchun turned around and asked Lin Dong behind him.

"Come on, two more days, 51 hours to be exact." Lin Dong replied with a smile, now that they have a good situation, they are waiting for Su Yichen's arrival, as long as Su Yichen arrives, then the next work can be carried out smoothly. The secrets of the Earth Base or the technology possessed by the Earth Base will bring a great breakthrough to the Earth civilization.

"And so long?" Wan Changchun said subconsciously.

Lin Dong smiled dumbly: "Teacher Wan, Xiao Su's arrival time is not slow, don't forget that he rushed back from the Pluto base." ”

"Yes, yes, yes! Am I not in a hurry? This stinky boy doesn't know what it's like now, and Xiaoyan, I really want to see them again soon! Wan Changchun nodded with a smile, and at the same time sighed. Lin Dong knew his mood very well, although 40 years of time were only a moment for the current Wan Changchun, but after returning to reality and understanding the truth, the feeling in his heart could not be described in words.

Just like Lin Dong back then. That year, when he saw Su Yichen, who had been missing for 30 years, standing in front of him alive, still the way he remembered. I also have great emotion in my heart. At that time, Lin Dong seemed to have traveled back to the past 30 years ago, and returned to the days and nights when they worked together for the Galaxy project.

On Earth, Wan Changchun and Lin Dong were looking forward to Su Yichen's early return, and on the Pioneer spaceship, Su Yichen and Luo Yan were also like arrows.

As the Pioneer gets closer to Earth. The two of them are like wanderers away from home, looking forward to it in their hearts, and at the same time a little excited.

"The spacecraft is about to slow down and enter the Earth's gravitational sphere, please command!"

The Vanguard's Brain made a request to slow down. Su Yichen gave the order to agree without hesitation. Since the speed of the Pioneer has long exceeded the speed of any other space vehicle on Earth, it must be slowed down when the Pioneer is approaching the Earth to ensure that it can enter the Earth's gravitational circle and choose an angle to land on the Earth. Otherwise, with the current high-speed flight of the Vanguard, it would not be able to land smoothly at all, and it would be able to fly directly out of the solar system in one breath.

In the hurry of coming back this time, there were only two people on the entire Pioneer, Su Yichen and Luo Yan, not that he was unwilling to bring people, but considering that they were about to stay on Earth for a long time when they returned to Earth this time, and during this time, the Pluto base also needed people to help deal with things.

Therefore, Su Yichen left his personnel on the Pluto base, and Su Li also stayed at the Pluto base as a bridge between the two bases. As for the Pioneer, after many improvements, the Pioneer has been equipped with a super brain made by Luo Yan herself, although this super brain is slightly less intelligent than Su Li's intelligence, but its computing power is more powerful, and it is fully capable of taking on the ability of the entire spaceship operator.

In addition, Luo Yan also built several small machines, all of which belong to artificial intelligence, and the manufacture of these machines is not only for space travel, but also for use in the earth base and other aspects, for which Su Yichen thinks it is still necessary.

The Pioneer began to slow down, and under the control of the spacecraft's brain, the Pioneer slowed down to a certain distance very smoothly, and after more than 20 hours, the Pioneer began to enter the Earth's gravitational sphere, and then calculated the most suitable angle to enter and prepare to land on the Earth. Looking down at the earth from space, the blue earth is still so beautiful, but they all know that the earth that has experienced this war is actually full of holes.

The Vanguard began to cut into the atmosphere, and as the hull shook slightly, the moment of final landing came. After passing through the atmosphere, Su Yichen and Luo Yan had clearly seen the scene on the earth, those destroyed cities and farms, those traces of the war left everywhere, and the exclamation expressions of the people who looked up and saw the dazzling light of the Pioneer in the sky like a meteor...... The two of them clasped their hands together, and they both saw a trace of sadness in their respective eyes.

The total time between the near-entry into the atmosphere and the final landing was not long, but the Pioneer flew almost all of Eurasia. Ten minutes later, under the control of the spaceship Zhi Brain, the Pioneer arrived above the Earth Base, and when the huge Earth Base appeared in front of them, the sadness in Su Yichen and Luo Yan's expressions had turned into excitement and joy. (To be continued......)