The revelation of the real history of the past also gave Ruan Lin an endless sense of motivation and purpose.

"WIT, a huge underground structure is rising under the ice, arrange the excavation robot and the survey robot!" Ruan Lin almost shouted this sentence again, and the sound of heavy ice gradually cracking was all around.

Ruan Lin remembered what Captain Titan Civilization said about 'small gifts'. From this point of view, he had already set up the underground structure to rise to the surface in an instant after the conversation, and the next step was for himself and WIT to find out the surprise he had given to the humans.

Ruan Lin also took advantage of the building's ascent to bump with the robot to the exit.

At this point, there was no cracking of the ice around me, and the jolting disappeared with it. It also revealed the true face of Lushan.

Ruan Lin stepped out of the exit with the robot behind him, and turned his head to see the original appearance of these buildings: the total building complex covers about 2 square kilometers. Their surfaces are pure white, and they are all triangular in shape, intersecting and connected by numerous passages. And the gate made of meteorites did not appear.

They are not underground structures as Ruan Lin thinks, they are originally surface buildings! They were all moved under a few kilometers of ice, presumably to avoid the risk of being discovered by the Zeroing civilization, and were subsequently restored to their original appearance.

Only then did Ruan Lin understand the good intentions of the Titan civilization: "Thank you. ”

A square building with a length and width of 500 meters stands out among them, and its appearance is connected by a large number of wires, like a watchtower covered with wires on the earth.

"Among them, there may be a gift left by the Titan civilization to mankind." Ruan Lin speculated.

"Wit, I'll explore the high-rise building with the robots behind me, and I'll leave the rest of the triangular low-rise buildings to you and the rest of the robots."

"Okay, Dr. Nguyen. I'll record the data one by one. ”

Ruan Lin began to set off for the building that stood out from the crowd.

It is connected by no passages, and is a free-standing building, with a faint blue light flashing throughout the building up close. Ruan Lin approached the door of the square building, and it opened automatically.

The moment he stepped into the building, the cloud-like projection in the center of the interior appeared with a familiar sound.

"You're welcome here, earthlings. We have already prepared a gift for you.

On the first floor are thirty quantum communication devices that we have left behind, which can guarantee the security of your information exchange, and they do not need relay stations, and they can travel up to 10 million kilometers, but they do not travel faster than the speed of light. I am confident that with your ingenuity you will soon be able to master this technology.

The second floor is the two remaining Tier 4 Civilization short-range space jump sub-engines in our fleet, and this short-range space jump cannot be used as the main engine. It will enable your ships to teleport in three dimensions within our universe from a four-dimensional perspective. This short range can reach up to 0.5 light-years, and its energy replenishment will not be mined until you reach level 4, at which point you will be able to build a space jump engine. Each can be used 15 times.

At the top are our improved EMP bombs and launchers, which can destroy all of other civilizations' equipment if they threaten them.

When you reach the top, separation is automatically enabled, and the 2nd and 3rd floors are placed on the outside.

We're sorry we can't give you more, but we hope you can put them to good use. I wish you all the best in the stars. ”

This is the end of the projection.

Ruan Lin repeated the greeting of the Titan civilization when they first met.

He lifted his heavy hands and crossed them under his jaw, lowered his head, and kissed his crossed hands.

"Thank you, Titans. The benefactor of the earth's civilization. ”

Ruan Lin only has infinite gratitude in his heart at the moment, these technologies are enough for himself to protect himself at the moment. He will also fulfill the last wish of the Titan civilization fleet and travel to their home planet.

On both sides of the first floor, there are neatly arranged white devices, which are quantum communication devices.

Ruan Lin saw the vacant part above the edge of the first floor, and walked over with the robot behind him. I stepped on the 'floor' under my feet, and I started to rise in an instant.

"It's an interesting elevator design." Ruan Lin said with a smile.

The short-range space-jumping engines on the second floor surprised him: these two engines were too huge! They are about 20 meters wide at their widest point, and the engine is about 40 meters long and 30 meters high. Ruan Lin looked at them and couldn't help but think of the popcorn machine on the street when he was a child, and they were very similar in appearance.

Such huge engines also gave Ruan Lin a headache: the Titan was not as big as them, and it was difficult to carry it himself, so he had to build two warships that could carry such auxiliary engines. The main engine also needs to keep up, and it must build a controlled fusion device and a supporting engine as soon as possible.

The oxides of deuterium and tritium are heavy water, and there are traces of heavy water in seawater, but the depth of the ocean beneath Europa's ice is as deep as 100 km, so there is no need to worry about these raw materials, and Europa is the best place for controlled nuclear fusion experiments outside of Earth. But the supporting controllable fusion engine is still a headache.

No longer thinking about these questions, Ruan Lin still walked to the vacant part above his head and arrived at the third floor.

Dozens of EMP bombs and launchers are placed here, and the technology is nearing maturity on Earth. Since they are transformed by the Titan civilization, their power range must be incomparable to that of small pulse bombs on Earth.

The second and third floors of the square building suddenly opened as if the storage boxes were placed in reverse, extending halfway to the left and right. Ruan Lin stood on the left edge of the third floor, and already saw the two engines of the second floor.

Ruan Lin smiled, "They are really caring, they know that it will take a lot of time for our civilization to take them out of this building, and this building is specially designed like this." ”

From this height, Ruan Lin looked at the Titan in the distance. I don't know what is the progress of WIT's base project and the research and development of ice drilling robots?

Ruan Lin and the robot beside him stood on the floor where they had just ascended and began to descend.

On the way back to the Titan, there are busy digging robots and survey robots, busy looking for information that Ruan Lin has not discovered.

Ruan Lin stood at the door of the Titan at this moment, looking at the surrounding white triangle complex, and then looking up at Jupiter, which was half the size of a field of vision. Jupiter above and alien civilization complexes below are contrasted, and it is really a scene full of science fiction.

At this time, WIT also took the initiative to open the hatch: "Dr. Ruan, fortunately, you didn't encounter any danger, I have a general understanding of the whole situation through the monitoring of the excavation robot behind you." ”

Ruan Lin walked to the main control room and sat on a chair: "This is a story that spans millions of years. ”