During this time, Zhu Lei waited for the return of the second fleet of the Vermilion Bird Army, and at the same time tried his best to learn about the high-energy particle shield generator purchased in the mall in the laboratory, after all, the protective shield currently has a very important role for the Ming Empire.

Therefore, the most important thing for Zhu Lei to solve now is the problem of the spaceship protective shield, after all, with the protective shield, the protection ability of all the spaceships of the Ming Empire against energy strikes will be greatly strengthened.

Now the Ming Empire's spaceship's ability to protect against energy strikes is really a bit weak, such as the war between the Ming Empire and the Sirius civilization this time.

In this war between the Ming Empire and the Sirius civilization, in the eyes of many people, the Ming Empire defeated the Sirius civilization with an absolute advantage.

Although the Ming Empire also paid a lot of price for this war, after all, hundreds of millions of casualties are nothing to the Ming Empire, after all, the Ming Empire has a population of more than 50 billion at this time.

But Zhu Lei didn't see it that way, the Ming Empire paid hundreds of millions of casualties in this war, and this price is not small.

You must know that in the entire Sirius system, the total population of the three civilizations is only 10 billion, and all the soldiers in it add up to only more than 1 billion, and the Ming Empire has an absolute advantage in military science and technology.

The weapons currently equipped on the current spaceships of the Ming Empire are basically one level higher than the Sirius civilization, or even higher, and in terms of defense, the Ming Empire is far superior to the Sirius civilization due to the development of material technology.

That's it, the Ming Empire is far superior to the Sirius civilization in terms of the speed of the spaceship, the weapons of the spaceship, and the defense of the spaceship, and it has paid such a heavy price.

Although the losses were so heavy, in fact, the main reason for such heavy losses in this war was the weak defense capability of the Ming Empire's spacecraft against energy strikes.

Although the Ming Empire has advanced material technology, the spaceship is very strong in resisting physical strikes, but the ability to resist energy strikes is indeed average, although the armor of the spaceship is engraved with runes, and it has a certain defensive ability against energy strikes, but it cannot be compared with the real protective shield at all.

Although the war between the Ming Empire and the Sirius civilization has ended, and the human race has finally defeated the Sirius civilization with its own technology and potential, making the human territory expand step by step, but what about the next time, and the next time!

If human beings are now at war with civilizations of the same level or higher level, if the other party masters the protective shield technology, then human beings will have to pay a heavy price if they want to defeat the other party, and such a price cannot be borne even by human beings with a population of more than 50 billion.

You must know that the more advanced the civilization, the greater their potential, the greater the total number of people, and the total population of the general sixth-level civilization is at least more than 10 billion, so in fact, the population of more than 50 billion in the Ming Empire is not a lot, and compared with the ordinary sixth-level civilization, it is only five times more than the other party.

Therefore, if it can really clash with a sixth-level civilization, then it will be very difficult for human beings to defeat each other, and even the probability of human defeat is greater than the probability of defeat.

"I understand, I finally understand the principle of the High Energy Particle Shield. Finally, the shield generator was manufactured. He shouted happily as he looked at the ugly machine on the workbench.

The ugly machine on the workbench is the result of more than 100 years of work, the electromagnetic high-energy particle shield.

This shield generator is actually not very large, its size is actually not much larger than a table, but its power is not small, and the maximum range of the shield can reach several kilometers, which means that such a small shield generator can protect a medium-sized spaceship.

Moreover, the protective shield that Zhu Lei researched not only has excellent performance in carrying energy strikes, but also has quite strong defensive capabilities against physical strikes, so it can be said that such a protective shield generator is what the Ming Empire is currently dreaming of.

In the past hundred years, Zhu Lei has failed countless experiments countless times, and even purchased a large number of protective shield generators in the mall, but due to the limitation of civilization level, it is difficult for Zhu Lei to buy the protective shield technology of advanced civilization, even if it is a high-level civilization protective shield generator, it is difficult to buy, and the intermediate civilization protective shield technology is not very practical for the Ming Empire, after all, the protective shield of intermediate civilization is actually just the prototype of the protective shield, and there is still a certain distance from the real protective shield technology.

Moreover, most of the protective shield technologies purchased in the mall have various flaws, and there are no perfect products at all, and most of the protective shield technologies can only protect against energy attacks but not physical attacks, which is not what Zhu Lei wants.

After all, not all civilizations in the universe use energy to attack, and there are also a small number of civilizations that have always followed the method of physical attack, especially pure mechanical civilizations.

Therefore, Zhu Lei hopes to use his ability to develop a protective shield that can protect against both energy attacks and physical attacks.

So he bought a large number of protective shield generators in the mall, and he only bought two protective shield generators for each civilization at most, and generally only bought one, and then Zhu Lei bought more than 50 sets of protective shield artifacts from the mall for more than a hundred years, which also made Zhu Lei's energy in the mall be consumed.

Even during this period, Zhu Lei also sold a large number of weapons and equipment to the mall, so it can be said that for the sake of protective cover technology, Zhu Lei can now be said to be poor and white, and once returned to the pre-liberation period.

For these energy coins spent to buy protective shield generators, although he was still very distressed in his heart, he didn't regret it in his heart.

Because Zhu Lei did not buy various civilized protective shield generators from the mall, it was impossible for Zhu Lei to develop the powerful protective shield generator in front of him.

And Zhu Lei's heart is actually very clear that the shield generator in front of him has actually exceeded the standard of the fifth-level civilization and reached the level of the sixth-level civilization, that is to say, the shield generator in front of him, if Zhu Lei did not buy the shield generators of other civilizations from the mall and study their principles, then Zhu Lei would not have developed the shield generator in front of him. It is even possible that when the Ming Empire reaches the sixth level, it will not be able to design a protective shield that protects against energy strikes and physical strikes.

In fact, the principle of this protective shield is very simple, that is, to use a strong magnetic field to create a strong force field, and then use special means to make high-energy particles move at high speed around the force field to achieve the purpose of protection.

But it is very difficult to realize such an idea, even Zhu Lei took nearly a hundred years to really master this technology.