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When several people were stopping, the engineering vehicles transporting materials drove over.

"This kind of transportation is a lot better than the horse-drawn carriages in the Qin Dynasty. It seems that it should be driven by an internal combustion engine." Wang Qingbao said.

Zhang Hao nodded.

"That's true, but the internal combustion engine is a product of the relatively early stage of technological civilization."

Since the earth's means of transportation still use internal combustion engines, this makes Wang Qingbao feel that the technological level of the earth is still relatively low.

Several people entered the factory together with the transport vehicle.

Inside the factory, hundreds of soldiers are intensively processing and producing.

This is the processing base of the spacecraft Voyager [-].

The general outline of "Voyager [-]" has been formed, and its overall size is comparable to Ace's mothership.

But the style of the design comes from aircraft carriers on Earth.

"Huh~" Zhao Siyan made a sound when she saw the appearance of the spaceship.

"What's wrong?" Wang Qingbao asked.

"Did you notice the difference?" Zhao Siyan asked back.

Wang Qingbao watched carefully the operating procedures of the soldiers.

"It's actually an automatic fusion of material technology. It seems that the material science of the earth and stars has come to the forefront. However, the progress of material science alone is not enough to carry out interstellar travel and reach the level of advanced civilization." Wang Qingbao said disappointedly.

From his heart, he naturally hopes that the higher the technological development of the earth, the better.

Qin Wuyan is also very concerned about the technological level of the earth.

But he noticed the details.

He said: "I just saw that the material of the transport vehicle outside is different from the material of the spaceship being built here, and the craftsmanship is completely different?"

Because according to the normal development of science and technology, if the earth is already capable of building high-level spacecraft, then it will naturally feed back to civilian use.

He wouldn't have seen many hidden welds on the transporter just now.

These two process routes are obviously not at the same level.

Zhang Hao stood up and said: "Captain Qin is really observant. In fact, according to the technological level of the earth itself, it is not enough to build spaceships. These are all carried out with the help of Ace."

Zhao Siyan had the original expression, and then praised Ace: "Not bad, King Ai, you are willing to share the technology of your own planet."

In the cosmic forest, higher civilizations are good at providing cash technology to lower civilizations free of charge.

Unless there is a purpose.

Ace smiled and responded: "To save the people of the tribe, I must rely on the power of the earth."

Qin Wuyan nodded, and said: "With the blessing of such technology, we have even more confidence in dealing with the x organization."

Wang Qingbao asked: "What about the power source of the spaceship?"

Ace replied, "Using bioenergy."

Qin Wuyan was not surprised, because bio-energy is very common in the universe, and their spacecraft used this energy for long-distance interstellar travel.

It's just that he casually asked: "Does the planet Earth have enough bio-energy?"

Bioenergy is one of the important energy sources in the universe, and its importance is equivalent to that of oil on the earth.

But bio-energy is very limited, because the population of other planets in the universe is generally not too large.

A normal planet has only tens of millions of inhabitants on average.

Just like the planet of Ace, its population is only about 2000 million.

But bioenergy is so important, how to ensure the supply?

The more complex organisms are, the more bioenergy they can produce.

Therefore, on a planet, the bio-energy produced by the situation of the planet will be purchased for a fee.

These energies will be used as strategic reserve resources for this planet.

This is the energy used by general interstellar travel spacecraft.

Civilian bio-energy will be a lower grade.Most of them are bioenergy produced by lower organisms on this planet.

This type of energy is generally not as pure as that produced by higher organisms, and its efficiency is also lower.

For example, on Earth.

Bioenergy produced by humans is a kind of bioenergy with high purity.

There are also blue whales, higher animals such as elephants, whose bio-energy is even purer than that of humans.

However, blue whales are rare marine organisms and cannot be used as the main source of bioenergy.

Conversely, for organisms such as cattle, sheep and pigs, the efficiency of producing bio-energy is relatively low, and the purity is not high.

Arthropods such as ants, not to mention the bioenergy that can be produced, can hardly be used.

That's why Qin Wuyan asked such a question.

At the time when he left the earth, the population of the Qin Dynasty was only about 2000 million.

The bioenergy that can be produced by this population resource is adequate.

Survival in the cosmic society naturally involves commodity trading.

Planet ai has technologies such as blue serum, which are used as capital for commodity circulation to earn cosmic coins.

Cosmocoin can buy more bio-energy.

Only with enough bio-energy can we go on further interstellar travel.

But Qin Wuyan thought about it, and it seems that the earth does not have any technology that can be produced.

This means that if you want to realize the initial accumulation of universe coins, you only need to rely on bio-energy.

Ace laughed.

"Captain Qin, you can be regarded as an earthling, haha, you are carrying precious jade without knowing it!"

Qin Wuyan was baffled by Ace's smile. Could there be something else in it that he didn't know?

"Ai Wang, what do you know, just tell me!"

"Let your fellow villagers tell you!"

Ace asked Zhang Hao to answer Qin Wuyan's doubts.

Wang Qingbao spoke first.

"Zhang Hao, don't you think that the earth's mineral resources are of great value in the universe? Or is it the technology to sell houses?"

He went on to say: "I'm afraid it won't work. The gold and silver of the earth and stars are not hard-coded items in the universe at all."

When he left the earth, during the Qin Dynasty, the role of gold and silver had already been manifested, so he thought so.

He also said: "Moreover, higher civilizations have very low requirements for survival, and they may not have much requirements for beautiful, tall and magnificent houses."

He remembered that at that time, His Majesty the First Emperor had a great demand for housing construction, and even broke ground for the Abang Palace.

Don't know how it's built? ?

"And things like gold and silver may be everywhere on some planets. Like ordinary stones, they are of little value."

Zhang Hao hadn't spoken yet. Unexpectedly, the other party had already said so much.

He said helplessly, "Wang Law Enforcement, that's not what I want to say!"

"Oh? Is there something better on Earth?" Wang Qingbao couldn't help but said.

Zhao Siyan also stared at Zhang Hao, wanting to hear what good things could come out of Zhang Hao's mouth.

Zhang Hao raised a finger.

"Oh, what do you mean, little brother, stop hanging around your sister~"

Zhao Siyan couldn't help acting like a baby.

Seeing this, Zhang Hao blurted out immediately, a second late, maybe Zhao Siyan was about to post it.

"100 billion!"

"The current population of the earth is 100 billion!"

Qin Wuyan, Zhao Siyan, Wang Qingbao, petrified on the spot!