In this limited development time, Luo Ji has a lot of projects to toss, although the speed of time has been adjusted, but he has been living a nervous life recently.

Especially in recent times, the successive mass production of dwarf tank fighting vehicles and biplane fighters, coupled with the formal establishment of a project team for the first generation of jet fighters and first-generation aircraft carriers, and a series of major actions such as investment in research and development, directly made the economy of the Luo Ji Wanjie civilization, which had just become rich, instantly became a little tense again.

In the next few years, Luo Ji obviously has to be calm.

If this is an additional project, then the financial pressure on his Ten Thousand Worlds Civilization will be too great.

Of course, he can do something else without adding projects.

For example, send out a few reconnaissance teams to open up the horizon of the Western Desert and the Bitter Cold Lands.

The indigenous cities discovered on the side of the Far Eastern Prairie in the early years made Luo Ji clearly realize that he had been a little slack in opening his horizons in the past few years.

The main reason is that the environment of those places is too harsh, and he has no plans to expand his territory into deserts or frozen soil in a short period of time, let alone build a city, so this exploration has been put on hold.

It wasn't until the natives of the Far Eastern steppes in the early years gave him a wake-up call that he began to send reconnaissance teams again.

And just when he was methodically opening his vision of the main continent, the nuclear energy research institute built in the bitter cold land also officially sent a report.

On this day, the first nuclear reactor of his civilization in the Ten Thousand Worlds was successfully developed!

This is a very important step for a civilization.

It's not that you can make mushroom bombs, but from this day on, this civilization can be regarded as officially taking the first step towards the atomic energy age!

Atomic energy is a good thing, and the energy it contains is many times stronger than ordinary energy sources.

In the real world, awesome aircraft carriers or submarines, that's all nuclear-powered.

Later, if conditions permit, he can also build a nuclear power plant, which is much less expensive than a thermal power station.

As for the mushroom bomb, as a strategic-level weapon, of course, it must also be developed.

However, if you want to say how good it is, you don't have to.

At least for Luo Ji at this stage, even if a mushroom bomb is developed, the deterrent effect of that thing is definitely greater than its practicality.

As soon as someone heard the mushroom bomb, he thought, 'Damn, I'm invincible, Lao Tzu can destroy the world!' Who else can be my opponent? ’

Actually, it's not like that at all.

To put it mildly, in the early days, the mushroom bomb was a paper tiger, and you wanted to use it, and it was very difficult.

In the real world, the first country to create and use Mushroom Bombs was the Lighthouse Nation, and for some time after that, other countries did not have Mushroom Bombs at all.

At this pace, if the mushroom bomb is really invincible in the world, then the lighthouse country should have made the world nuclear level a long time ago.

But the truth is that there is none.

Why is that? You wouldn't be so naïve as to think that those people in the Lighthouse Country were decent gentlemen, would you? How can it be?

In fact, as mentioned above, at that time, it was really difficult to use mushroom bullets, unless what you wanted to do was detonate on the spot......

The fundamental reason for this situation is that the power supply battery of the detonation system in the mushroom bomb at that time was not durable enough, and could only last for about 30 hours.

At the same time, due to the heat release problem of the plutonium element in the mushroom bomb and the corrosion problem of the battery, after the assembly of a mushroom bomb is completed, it basically has to be re-disassembled, charged and replaced with parts, or directly and completely dismantled and turned into parts.

Therefore, at that time, the word 'hoarding' basically did not exist for mushroom bullets, and only when they were needed would they be assembled.

And after assembly, bomb dropping is also a problem.

At that time, the only means of dropping bombs was to transport them by plane and drop them by air.

Here, distance becomes a problem.

Take off from an airfield on your own turf and fly to someone else's turf to drop a mushroom bomb? It's not as easy as it says.

At that time, the flight time and flight distance of the aircraft were very limited, and the mushroom bomb itself had a time limit due to the above reasons, and the enemy who was a little farther away was not within your strike range.

And if you assume that the enemy is just within your attack range, then, according to the technology at the time, there is basically no accuracy in the airdrop, under this premise, it is impossible to carry out a precise strike on the enemy army, and the only thing that can be done is to blow up the enemy's important cities.

But now the problem is again, if you want to bomb an important city, you have to know which one is first.

In other words, you have to have a detailed map of the enemy......

But the enemy is not stupid, how can he easily reveal the detailed map information of his territory?

In this way, the success rate of bomb dropping is too low, and if you want to blow up a city, under normal circumstances, a mushroom bomb is not enough at all, and the manufacturing cost of mushroom bombs is so high.

In other words, there is a lot of financial pressure, and while it can't be done, it's also a bit overwhelming.

This is the actual situation.

Combined with the above reasons, for Luo Ji, the mushroom bomb is obviously not as good as Mia's lava bewitching star.

He attaches great importance to the development of atomic energy, and as for the mushroom bomb, it was like that in the early stage.

The reason for research and development is to have a mentality that something is better than nothing.

After that, a period of time passed, and a document in front of him made Luo Ji can't help but open his system map.

This document was sent by the Ministry of Construction Engineering.

Mentioned is another super project of his Ten Thousand Worlds Civilization, the construction of the Great Wall!

In the past few years, when the labor force has been full, the Great Wall of Luo Jina has finally been built all the way to the east.

Compared with the cities in the Central Plains, there are actually relatively few grassland cities in the Luoji Ten Thousand Realms civilization, and there are only a dozen of them.

With this as a premise, where the Great Wall should be enclosed has become an important issue that needs to be confirmed by Luo Ji himself.

For this question, Luo Ji also pondered for a while.

For long-term considerations, he still wants to pack a little more of the land on the eastern prairie.

But I'm afraid that I will pack too much at once, and it will be too far away from the rear cities and fortresses, and once it is time to fight, it will affect the speed of support, and it will not be easy to garrison at the same time.

In this way, after weighing it in his heart for a while, Luo Ji finally decided to be safe first.

Taking the maximum distance on the border as the standard, it is almost enough to reserve the width of the two cities.

And in this area, there are more than two cities, because in addition to width, there is also length.