The human civilization in this world is interconnected, connected in various ways, if the primitive people on the native planet where Ren Di is located are the first-level civilization, He Xingmen is connected to the management of the family of the Nanye Kingdom that only has bronze technology, and that family should be the second-level, and that family goes four hundred kilometers to the east, which is the territory of the Nanye Kingdom. And the kings of the Southern Ye Kingdom can only be regarded as third-level if they master steel smelting.

That second-level family has ten star gates, which sounds like ten, and the size of the star gate is very small. Just Stonehenge is equal, and all a second-level civilization can do on the planet is to open up hundreds of kilometers of land (the size of Henan. This is the luckiest case, as Stargate is located in the alluvial Great Plains or in the warm regions of the West Coast that are crossed by ocean currents. If it's unlucky. Nestled in the middle of the mountains.

The second-level forces will not even mine it and let it be wasted. This is the case with the planet that Ren Di first descended on, yes, the land where the star gate opened on the northern plateau was regarded as a bitter cold land by that second-level family. The second-level forces theoretically have ten planetary gates, but in reality, there are none.

And the first-level civilization, the primitive tribes are theoretically able to cross the stargate, but in fact, their fur clothes and rock productivity sometimes can't go to the place where there is a world gate on this planet.

First-class power. If you don't have the consciousness of establishing a country, the second-level forces may have the consciousness of establishing a kingdom and city-state, but if there is a Celestial Empire next to it, it will be automatically demoted and become a feudator.

And the fourth-level civilization, the nobles are tired of being in their own kingdom, and they can go out to the third-level forces to enjoy the touting of the third-level kingdom. It was a kind of Republic of China period, and foreigners were as happy as they were in Shanghai for more than ten miles.

And when it comes to the fifth-level civilization, it also has its own position and order, and Da Ang is likely to occupy the position of the Tower Republic, so the Tower Republic invades strongly. In fact, Da Ang didn't know that in the position of the Republic of Iron Tower, it also bordered on a higher civilization.

The upper and lower levels of civilization are bordered, and the higher civilization wants to meet two conditions, the first is to be able to use the stargate to obtain materials, the second is to monitor the changes of the lower civilization, so as not to let the lower civilization overtake, and the third is not to spread its own technology to the lower civilization in the exchange

So the sixth-level civilization, the sixth-level civilization's stargate is in space. Rocky space planet. In the 21st century, what restricts human access to space is not that the quality of space equipment manufactured by human beings is not suitable for space, but that rockets that lack carrying and high thrust will propel a large amount of material into space.

Even if manned aviation in the 21st century continues to develop, the carrier equipment of rockets has reached its limit in materials engineering, and there will be no anti-gravity things, and the technology of that thing is more troublesome and the bend is bigger. Counting on that stuff is as unreliable as counting on a nuclear power plant in the Bronze Age.

Only after the success of nuclear fusion has the energy production jumped to a level, far ahead of the power generation capacity of China and the United States in the 21st century. After the engineering and mass production of rockets, a mature technology, and maintaining the carrying capacity of space at the level of a train line in the 21st century, space cities will appear around the earth, and the physical conditions of this world are too favorable for these civilizations.

Level 6 civilizations can land on satellites around their planets. Then build the stargate selection there. It is possible to settle on planets in outer space without having to think about rockets, an environment that overcomes energy in the Earth's gravitational field. Choosing a planet with less gravity allows a thousand-ton warship to overcome the gravitational pull of the satellite and go into space. Although the mass of the satellite is small, such a large piece of planet-level minerals is enough for humans.

However, the path of the earth that must click on the energy technology tree in order to colonize the solar system, the sixth-level civilization of this plane can jump over this technological threshold and directly embark on the road of planet colonization.

The way in which the Zeye civilization borders the Tower Republic is that the star gate is placed on the moon of the star, the capital of the Tower Republic. For tens of thousands of years, it has even formed a circle of space floats around the moon, like a thin veil covering the planet.

And the embassy of the civilization on the tower republic is also very special, it is an island in the tropical Hainan Island. Every year, the island drops tens of thousands of tons of materials from space to millions of tons, and in this equatorial part of the equator, you can see the channels for the maintenance personnel of the civilization to travel to and from space.

It was through this channel that Chen Ru and the others entered the lower planets with the topic of collecting the infectious lethality of pathogens in a low aura environment.

This project is just a project to maintain friendship and communication between the Yager civilization and the career choice civilization, which is equivalent to sending exchange students to each other in the 21st century between the two primary schools in China and the United States to experience life.

The virus samples have been examined by all the civilizations that choose jobs, and they are not viruses containing heavy nuclear elements, but only carbon-based viruses. For a sixth-level civilization, only a virus that contains heavy nuclear elements and can disassemble organic matter and absorb heavy nuclear elements to reproduce in a sixth-level civilization environment is a threatening virus. In terms of engineering, that virus is like a high-energy nanobot that can turn humans into humans in a few dozen minutes. That kind of thing takes apart proteins, inserts genes, and then gives genes the power to synthesize new proteins

As for carbon-based viruses that do not have heavy nuclear elements as energy sources, they are just disassembling organic matter. The diffusion of wind and drizzle in water (body fluid environment) is lethal to lower civilizations, but not to higher civilizations with intact medical equipment.

And Chen Ru and others carried these and experimented on the forces of the lower civilization, the third and the second. In the eyes of the Accord civilization and the career choice civilization, it is as common as the interns in medical schools who dissect the deaths caused by white rabbits, guinea pigs, and frogs.

The two civilizations are now in a period of friendship, and the civil organizations of the two sides often carry out such low-level scientific research exchanges. So go back to the first time Ren Di and Chen Ru met, Chen Ru was alone, and he was meeting Ren Di in the appearance of a big ang.

His and Ren Di met by chance, but Chen Ru was by no means loitering. And the second time, when he entered with a team, it was still in this name, and it was a purposeful investigation, with the purpose of finding Ren Di. Conduct surveys.

Now Chen Ru and the others have returned to the capital of the Iron Tower Republic, and as for their individual armor and firearms, they have been secretly entrusted to the family stronghold in the heart of the Iron Tower Republic. Of course, this move is illegal, and if you are caught by the civilized choice of employment, there will be a little diplomatic dispute.

Chen Ru and the others will be permanently expelled and not allowed to re-enter the territory of the Career Civilization, and in the territory where they cannot enter the Career Civilization, they will naturally not be able to reach their subordinate civilization, the Iron Tower Republic.

Chen Ru and the others changed into civilian clothes again, carried the box, and returned to the embassy area of the low-level civilization Venus virus test, that is, the island. Chen Ru and several team members carried out biochemical monitoring in the fire room, and after a careful examination in the isolation area for seven days, if there is a virus infection in seven days, the rapid disorder of body protein caused by the virus will definitely be reflected.

After this set of inspection procedures, Chen Ru and the others changed into civilian clothes, exchanged passport identities, and lay down on the space capsule of the rocket launch tower. As the engines in the tail of the rocket spewed out clear blue flames, the rocket took off. Went into space orbit.

After confirming that he had entered space, looking through the glass window, the huge planet of the Iron Tower Republic, Chen Ru took a breath.

He walked to the gate of the space capsule, paused, modified the ship's system, and then opened the door of the space capsule, if he didn't change the system, now when he unscrewed the gate, the system would alarm, and the entire cabin would keep flashing red. The subsequent action he does will be recorded by the ship's systems.

After opening the hatch, a light appeared in his palm, and a layer of energy directly restrained the airflow of the capsule from surging out of space, Chen Ru walked out of the capsule like this, and then the door of the capsule behind him closed tightly.

Chen Ru stands in the void in space, in the atmosphere in the sky, is an innate sign, does not rely on any maintenance system, in the universe in the void, can open from the star gate in the body, the world to maintain the body energy system, this is the symbol of energy releaser and energy controller.

Chen Ru is an energy releaser. The huge blue planet on the left of the starry sky is the home planet of the Eiffel Tower Republic, which is moving away from it as it slowly rotates.

On the right, there is the white moon, which is lit by the sun, the moon of the Republic of Tower. is approaching, on the dark canopy. Countless stars twinkled. Chen Ru didn't enjoy the beautiful scenery. He looked back at the silent space station in orbit on the home planet of the Eiffel Tower.

All of his teammates are stranded in the space station, which acts as a transit station through the capsule to the moon. In space, Chen Ru searched for this space station.

In the process of hesitation, Chen Ru slowly raised his hands. Energy appeared on the palm, and the energy was very focused. Eventually, this beam of energy was launched, targeting the space station. After this beam of energy shot out, Chen Ru's eyes were replaced by coldness.

Five minutes ago, in the space, in a separate room, players were floating crookedly in the weightless space, surrounded by a ball.

Team member A said: "Do you think that the captain has changed a little recently. ”

Team Member B said, "What's going on?" ”

Team member A scratched his chin and said, "It seems that he has become very concerned about us." ”

Team Member B said, "The captain has been very good. ”

At this time, team member C interjected: "It's very good now, you didn't see the captain, you didn't see our anxious appearance, he could have gone first in the space station, and now he waited until our team arrived at the space station before taking the first return capsule back." ”

Team Member A said, "But I always think it's a little weird. ”

Team member Ding floated over in the cabin as if he was swimming in water, patted A's head with his hand and said, "Don't think nonsense. ”

A snorted in pain, and let out a telepathic force to prepare to educate Ding. And at this time, the red alert meditates in the cabin. A sound like a pressure cooker bursting appeared in the cabin, and a large hole appeared in the otherwise sturdy cabin. A large amount of air is lost out of space.

Fifteen minutes later, watching the raging flames appear in the space orbit where the space station is located, Chen Ru stopped projecting energy there. Without looking back, he opened the capsule and returned to the capsule. No longer glance at the tragedy of space behind it.

Maybe it's coldness, maybe it's weakness.

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