It's reasonable for me to have a two-way foil for a second-level civilization, right?

When the test report appeared in the holographic projection, the last hope in Fang Xu's heart was extinguished.

"do not forget."

"Starting today, your training volume will double."

While looking at the test report, Lu Yongchang teased the pale-faced Fang Xu.

On the other side, Cao Liangcai looked at Fang Xu who was sitting blankly on the chair, and shook his head regretfully.

What a young man, why can't he think about betting with Lu Yongchang?

Chapter 323 Cyanobacteria-Like Life

The bet is just a small episode.

The key point is naturally the water body inspection report in front of him.

After all, this concerns the safety of the human community.

After carefully reviewing the report, Lu Yongchang let out a long sigh of relief.

In several samples, only a single-celled organism with a simple structure was detected.

"It appears that life on this planet has just begun to evolve."

Lu Yongchang said in a relaxed tone.

This is undoubtedly good news.

Typically, the threat to these primitive life forms is not high.

To be on the safe side, Lu Yongchang ordered to send more probes to Ross 2.

……

A month later.

3000 starships with dilapidated surfaces arrived at their destination.

Under Zero's precise control, these starships follow the orbit of the Ross 2 star and move around Ross 154.

During this one-month voyage, the remaining three interstellar probes are still moving around Ross 154.

Meanwhile, 90 percent of the optical and radio telescopes in the human fleet are focused on the young star.

The Ross 2 star is also surrounded by hundreds of satellites with different functions.

Under the high-intensity observation that lasted for a month, neither Ross 154 nor Ross 2 showed the slightest abnormality.

This also made Lu Yongchang completely let go of his worries.

He believes that a normal high-level civilization with the ability to strike stars will never deliberately hide its whereabouts for the sake of a mere second-level civilization!

This is like, facing a group of ants, no one will hide in the corner to hide the traces of their existence, just to give the ants a "corner kill".

"Tomorrow, land on Ross 2!"

Looking at the solid planet with star rings outside the porthole, Lu Yongchang smiled expectantly on his face.

……

The next day.

Hundreds of Xuannv-2 sailed out of the [Earth] port and headed straight for the Ross [-] star in the distance!

On this day, Ross 2 star, which has been lonely for countless years, welcomed the first batch of tourists.

The high temperature brought by the Hall thruster formed strange lines in the upper atmosphere.

In the blue sky, hundreds of long rainbows appeared!

The Xuannv No. [-] fleet crossed thousands of mountains and rivers, and finally came to the "city building point" selected by Lu Yongchang.

The hatch opened slowly.

Scientific researchers, robots, material transport vehicles...

file out.

……

Wearing a space suit, Lu Yongchang stomped his feet vigorously, feeling the touch of the solid ground.

It is slightly different from the land of Proxima Centauri.

Due to the influence of various creatures, the land texture of Proxima Centauri is more like the earth.

And the land of Ross 2 gave him a feeling of returning to Mars.

"Let's go."

Lu Yongchang greeted Fang Xu beside him: "Let's go get samples."

"As long as it is determined that these indigenous people have no impact on humans, we can start building cities."

Fang Xu responded, and quickly walked towards the planetary landing vehicle beside him.

Thanks to the month-long exercise in the gravity chamber, Fang Xu's footsteps appeared extremely solid without any sense of emptiness.

"Snapped!"

Lu Yongchang walked around behind Fang Xu, and patted him on the shoulder lightly: "Not bad."

"It seems that the gravity cabin exercise is quite useful!"

Hearing the voice from the radio in the team, Fang Xu's hands stopped suddenly.

He turned his head and glanced resentfully at Lu Yongchang, who was full of smiles.

Can it be useless? !

He even slept in the medical cabin for the first few days in the gravity cabin!

If it weren't for the help of the medical cabin, Fang Xu even doubted whether he would be able to successfully participate in this landing operation!

"...Let's go." Fang Xu changed the subject in a clumsy way, "Go and sample."

Seeing Fang Xu's embarrassing appearance, Lu Yongchang couldn't help but laugh.

He didn't break Fang Xu's mind, and climbed directly onto the tall planetary landing vehicle.

Considering the various complex terrains that may exist on the surface of the planet, the planetary lander has extremely strong off-road performance.

This Plus version of the "off-road vehicle" uses small nuclear fusion as energy, and the body is made of the same carbon yne material as the starship.

In order to ensure the safety of scientific researchers, the designers even installed two small electromagnetic guns and a small laser cannon!

As soon as he got into the cockpit, Lu Yongchang saw Fang Xu's strange eyes.

"how?"

"...you know how to drive this thing?"

Lu Yongchang nodded calmly: "Of course!"

"??!" Fang Xu was amazed, "When did you learn it? I remember that the design of this car was just published a month ago?!"

Lv Yongchang sneered, pulled out the seat belt from the side with great skill, and then stretched out his hand to press a button on the side.

The vehicle starts.

The dashboard lights up slowly.

"Zero, you control it."

Fang Xu: "..."

……

After retrieving the samples, Lu Yongchang returned directly to Xuannv No. [-] without stopping.

In the cabin of Xuannv No. [-], which was converted into a biological laboratory, Lu Yongchang was wearing protective clothing and carried out a series of inspections with ease.

After experiencing Mars and Proxima b, he became more proficient in dealing with extraterrestrial life.

When all the test results came out, Lu Yongchang was slightly relieved.

"No big problem."

"Just some simple organisms like cyanobacteria."

"Through the treatment of the nano-filtration device, the river water can even be drunk directly." Lu Yongchang looked at the various indicators in the holographic projection and said softly, "It even contains a lot of minerals that are beneficial to humans."

Nanofiltration devices, in simple terms, are filtration systems based on nanorobots.

This device is widely used on Proxima b to completely eliminate various alien microorganisms contained in water sources.

"So, how do these single-celled organisms survive in this environment?" Fang Xu asked curiously.

While looking at the holographic projection in front of him, Lu Yongchang explained: "Have you heard of nitrogen-fixing plants?"

Fang Xu frowned and thought for a while: "You mean... soybeans?"

Lu Yongchang glanced at Fang Xu helplessly.

"It's a little bit on point."

"On Earth, nitrogen-fixing plants fall into three categories."

"The first two are plants that live in symbiosis with Rhizobium and Frankia."

"There is another kind of plant that lives in symbiosis with blue-green algae."

"These single-celled organisms can absorb nitrogen from the atmosphere in a process... somewhat similar to nitrogen-fixing cyanobacteria."

"Tests show that they can absorb nitrogen gas and convert it into nitrogen compounds."

"At the same time, during the growth process, compounds such as amino acids and polypeptides can also be released."

"Compared to the solar system, this star system is too young."

"Perhaps, after more than a billion years, some complex life forms will appear on this planet."

Chapter 324 Birthday

After confirming that the life on Ross 2 is still in its most primitive state and does not pose much threat to humans, Lu Yongchang directly ordered the start of the city construction project.

After completing a series of planning work, he boarded Xuannv No. [-] again.

Before the construction of the central city is completed, he needs to return to the [Earth] to continue the research mission.

During the voyage, Lu Yongchang sat on a chair and slowly closed his eyes.

Consciousness then came to the familiar fluorescent green space.

Against the background of fluorescent green, the tree diagram outlined by bright white lines is particularly clear.

The basic outline of the second-level civilization technology tree was presented in front of him.

This means that, under the leadership of Lu Yongchang, human civilization has mastered the main technology of secondary civilization within 60 years.

Next, it is the "filling" of each "branch" of the technology tree.

When all the main technologies are unlocked, the "filling" work is not difficult, but it is an extremely tedious task.

For example, the miniaturization of Type II laser weapons, the miniaturization and civilian use of ternary photonic computers...

As for why you do such a thankless job...

Lu Yongchang sighed silently in his heart, raised his head and looked towards the top of the technology tree.

As before, at the top of the level [-] civilization technology tree, there is a faint, extremely dim cursor.

According to past experience, this technology should be the threshold for entering a third-level civilization.

It's just that, unlike before, this cursor is shrouded in a thick fog.

No matter how Lu Yongchang adjusted the angle of observation, he couldn't see the content of the cursor.

At first, Lu Yongchang didn't know the way.

It wasn't until he tried to fill in the "branches" of the technology tree that he realized the effect of this fog.

Every time a branch of technology is completed, the fog will lighten a bit.

In other words, only when the entire technology tree is completely completed, the technology tree system will provide him with clues about advancing to the third level of civilization.

Of course, Lu Yongchang also had a crooked mind.