Although hydrogen energy is not an innovative product this time, it is actually a kind of thermal energy, but its energy output is ten times greater than the equivalent amount of steam and electricity combined. Times.

Of course.

In terms of human interstellar technology at this stage, it is only enough to launch the probe to the Blue Country and bring back a small amount of elements.

Moreover, the cost is extremely high, and the hydrogen element shipped back is less than one ten thousandth of the aircraft's consumption.

How to solve the long-term long-distance navigation of the aircraft, that is, the problem of endurance, has become the first major event for all mankind.

For the time being, remember this matter in the heart, there are more critical things than this right now.

Win the war.

——————

Abraham unexpectedly remained silent in the next few days.

From the perspective of his character portrait, he is the easiest to make some violent actions.

He pointed his finger at the nuclear weapon button and said, "No one knows war better than me." "Art is explosion" and he is not incapable of doing things like that.

As the saying goes, if something goes wrong, there must be a demon.

In the past few days, the other two countries have neither withdrawn their troops nor made further progress.

Tang Zheng seized this opportunity to rapidly develop his own civilization.

What worries him most is the sudden global announcement after opening the civilization restart stone.

Fortunately, no, even Lan Lan, who has been dangling by her side, didn't say much.

It seems that this kind of civilized mission notice will only be announced when players all over the world have missions.

Tang Zheng is relieved.

With the current attribute value bonus, and the surrounding technology, the civilization missions are flying fast.

The first item, the primordial people entered the Stone Age and made a three-piece set of stone tools + wood house.

Tang Zheng casually found an excuse, and Alone slipped back to his lake house and passed the Transmission Gate in the mansion that requires the highest authority to enter.

In fact, to put it bluntly, it was the teleportation totem he had planted in the City of Night.

Tang Zheng only now knew that the position where his totem was inserted was directly changed to the mansion of the country.

There used to be two mountain ranges here, but they were hollowed out.

Night City not just in name only, but also in reality is a rugged mountain city, only under the cover of future technology, plus he doesn't usually go out very much, almost can't feel it.

When I came to the cottage by the lake, it still retains its previous appearance, but the area of ​​the lake has shrunk slightly.

Look at my own industrial system now, it is old, the most primordial cement machine, and the production and assembly of the differential engine and the steam engine are all rusty at this time, and the steel is oxidized. After the rust.

No time to sigh, Tang Zheng opened the system light curtain.

I saw the first civilized mission branch that was familiar and unfamiliar.

【Please complete the following four civilized side missions. 】

[Stone axe, stone pick, stone shovel, wood house]

[Stone Age: 04]

[Reward: Received]

I still remember that it took several days to make these four-piece sets for the first time.

Even if I have a synthesis station, I have been stuck in the production of wood house for several days.

But it's different now.

With my current four-dimension of more than 5,000 points, I don’t want to do these things too with no difficulty.

The three-piece set of stone tools was thrown into the synthesis station to wait for mass production. The synthesis station was reset due to freezing, and only LVLevel 1 remained.

However, Tang Zheng believes that its improvement speed will only be faster or slower than before.

For the wood house, the surrounding trees are lush and lush due to ten years of barbaric growth.

Tang Zheng stepped forward and hugged a big tree with a thick waist at will.

Like pulling up an onion, with no difficulty pull the trees up by the roots.

There is no thing to cut branches in his hand. Tang Zheng directly uses his hand as a blade, raising his hand and dropping a few times to cut the branches cleanly.

A few minutes later, a small wood house was built by him.

The production of the three-piece set of stone tools has also been completed simultaneously.

Go straight into the Stone Age!

Next, it was the Neolithic Age.

……

All day long, Tang Zheng develops civilized technology next to his old house.

In the game of harbor ulterior motives of the foreign nations, under the speculation of the war situation of the citizens of various countries.

No one noticed that on a piece of unremarkable woods and lakes, there is a guy who is developing civilization at an unimaginable speed.

Neolithic age, reached!

Bronze Age, reached!

Iron Age, reach it!

Achieved in the steam age!

Achieved in the electrical age!

In the information age, achieved!

In just one day, Tang Zheng has continuously broken through seven eras, fast enough to shock the world.

If the whole world knows that he is secretly developing civilization.

Until the time came to the evening, Lan Lan had suspiciously asked him what he was doing, whether he was called away by some weird woman, and why he didn't see the silhouette all day.

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