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

Once the cable material problem was solved, another difficulty arose.

The problem of building a space elevator.

In the imagination, the ideal construction plan of the space elevator is to build from the top down.

To put it simply, the prepared cable is transported to an altitude of 9.1 kilometers above the surface, and then the cable is slowly lowered back to the ground.

The cables were then secured to the foundation and the rest of the construction began.

Because of the existence of cables, at this time, the simple space elevator can already run.

The problem of material transportation has also been easily solved.

It sounds like everything is going smoothly.

But such a process is easy to say, but very difficult to do.

Among other things, the weight of the 9.1 kilometers of cables alone is a big problem.

Even though the density of carbon nanotubes is only one-sixth that of steel.

According to Zero's calculations, in order to ensure the stability of the spaceport, the diameter of the entire cable will reach an astonishing five meters!

Moreover, in order to increase the tensile strength of the cable, they also need to add a large number of spikes during the weaving process.

In this way, with a diameter of 5 meters and a length of 9.1 kilometers, the weight of the cable is not what current aircraft can bear!

As for making a small spaceport first, and then making cables on it...

This is even more unworkable!

This is completely putting the cart before the horse!

If Lu Yongchang can quickly transport these materials to space now, why would he build a space elevator?

So... just like that, the manufacturing plan of the space elevator fell into an endless loop.

……

Lu Yongchang frowned and sat at the desk, the pen in his hand was unconsciously scribbling on the A4 paper in front of him, making irregular rustling sounds.

Su Yutong, who was buried in his studies, moved his ears slightly, and looked up in Lu Yongchang's direction.

Seeing Lu Yongchang's appearance, Su Yutong's eyes flashed with surprise.

After such a long time, she has never seen Lu Yongchang who behaved like this!

After thinking for a moment, she asked cautiously, "Professor, have you encountered any problems?"

The movement of the pen in Lu Yongchang's hand suddenly stopped, and then a long sigh came.

"Yeah, I have encountered a big problem..."

Lu Yongchang turned his head to look at Su Yutong at the side, and met her puzzled eyes.

With a slight movement in his heart, he briefly described the problems he encountered.

At the end, a look of anticipation flashed in his eyes: "Do you understand? How do you think it should be solved?"

Su Yutong nodded thoughtfully.

"Professor, since the small-scale spaceport plan is not feasible, why can't we make cables on Xuannv-[-]?"

Lu Yongchang was slightly taken aback, and subconsciously retorted.

"What are you kidding?"

"The size of Xuannv No. [-] cannot bear the task of making cables, and its weight is not enough to be used as a counterweight for a space elevator."

"As for larger space planes... they can only be built on spaceports."

Su Yutong chuckled lightly: "If one is not enough, how about ten? Or, twenty?"

Lu Yongchang was about to shake his head to refute, but a flash of light flashed in his mind!

He was the one who got into a dead end!

A gleam of excitement burst out from Lu Yongchang's eyes. He turned around abruptly and sat back at the desk. The pen in his hand quickly wrote on the A4 paper in front of him.

Seeing this scene, a smile flashed across Su Yutong's eyes.

The next second, she buried her head in the pile of documents in front of her again.

PS. June [-], I went out to eat hot pot with my girlfriend, there are only two more... QAQ

Chapter 148 Only War

more than an hour later.

Lu Yongchang raised his head from the pile of draft paper in front of him, and heaved a long sigh of relief.

He reached out and tidied up the draft paper a little bit.

"Zero, check it out for me."

As Lu Yongchang's voice fell, the camera on the side moved slightly, quickly scanning the content on the draft paper into the computer.

After a few minutes.

"Professor, the plan is feasible."

A faint smile appeared on Lu Yongchang's face.

Before he could continue to say anything, Zero's voice sounded again.

"Professor, Mr. Hong is here."

Hearing this name, Lu Yongchang was stunned, but he didn't react for a while.

After a few seconds, he came back to his senses: "Minister Hong?"

"Yes, but he is now a member of the People's Federation." Ling meticulously corrected Lu Yongchang's slip of the tongue, "Also, he has already arrived at the door."

As soon as the voice fell, the door of the office opened automatically.

Outside the door, Hong Qiming raised his hand in surprise, stared blankly at Lu Yongchang who was sitting behind the desk, and then at the door that opened automatically in front of him.

Lu Yongchang shrugged slightly, stood up from his seat and explained softly: "It's just a little work done by the zero-control robot."

"So, why do you have time to come to my place?"

"The People's Federation has just been established. As a member of parliament, you should not be so free now, right?"

While talking, he turned his head to the side and said, "Zero, make tea."

The next moment, a robot arm hiding in the corner slowly stepped forward, gently opened the cabinet door, and took out the teacup and tea from it.

Seeing the skillful and standard tea making action of the manipulator, Hong Qiming swallowed slightly.

"Professor Lu, your office...is getting more and more sci-fi."

He sighed sincerely.

Lu Yongchang smiled and pointed to the chair in front of him: "It's just gadgets. The development of aerospace technology has also led to the progress of many subsidiary technologies."

"These robotic arms and robots, with zero manipulation, are already more flexible than most humans."

"I heard from Ling that a sub-lab has recently made a breakthrough in holographic imaging technology. It is estimated that the original mobile phone and display will be eliminated in a short time."

Hong Qiming opened his mouth slightly, but didn't say anything, he just sighed with emotion: "It's so fast..."

"Hurry up?" Seeing Hong Qiming sitting down, Lu Yongchang also sat back in the chair.

"I think it's a normal development."

"Life appeared on Earth 38 billion years ago, but apes did not appear on Earth until 4500 million years ago."

"And most of what we have today has been developed in the last few hundred years."

"Unless we encounter the so-called bottleneck of technological development, the speed of human development will only get faster and faster."

Hong Qiming touched the tip of his nose with a wry smile: "My fault, I shouldn't have discussed this kind of issue with you."

At this time, Zero controlled the robotic arm and handed the steaming teacup to Hong Qiming.

He hurriedly reached out to take the teacup, subconsciously nodded to the mechanical arm in front of him: "Thank you."

Seeing that the mechanical arm "nods" like a human, Hong Qiming suddenly came back to his senses.

What is he doing...

Seeing the faint smile on Lu Yongchang's mouth, Hong Qiming couldn't help but shook his head with a wry smile.

"It seems that I will have to come to your office more often in the future, otherwise, I will probably be the same as Grandma Liu who just entered the Grand View Garden."

Hearing this, Lu Yongchang finally couldn't help laughing.

Facing Lu Yongchang's "mocking", Hong Qiming put down the teacup in his hand, took a deep breath, and directly changed the topic: "Okay, let's not talk too much, I should get down to business!"

Hong Qiming looked a little serious: "Do you know what happened outside these two days?"

Lu Yongchang's eyes showed a bit of bewilderment.

He shook his head subconsciously: "I've been in the carbon nanotron laboratory for a month, how can I have time to care about outside affairs?"

"The chairman of the congress is indeed right..." Hong Qiming shook his head with a wry smile, and continued, "In order to better adapt to the universe, the People's Federation decided to establish the People's Federation Science Academy, which is mainly responsible for the direction of civilization development and external affairs of civilization. As for the parliament , and will only be responsible for the internal affairs of civilization in the future.”

"There is no affiliation between the two."

Lu Yongchang nodded as usual: "What else?"

Seeing Lu Yongchang's reaction, Hong Qiming coughed suddenly: "Are you not surprised by this?"

"It's just a reasonable development, what's so surprising." Lu Yongchang reached out to pick up the teacup beside him.

The development is exactly the same as the previous life.

He added silently in his heart.

"Then...at the meeting, the chairman of the council recommended you to be the chief scientist, and it has been unanimously approved." Hong Qiming continued with a strange expression, "now you and councilor Li are equal in status."

"Moreover, when civilization is in crisis, the Academy of Sciences has the priority to control civilization, which is also to prevent some unexpected situations from appearing."

"So, in a sense, your status is now higher than Councilor Li's."

"Cough, cough, cough!"

Lu Yongchang hurriedly put down the teacup in his hand, and reached out to take the paper handed over by Hong Qiming.

"So fast?!"

After wiping his mouth, Lu Yongchang asked Hong Qiming with a look of disbelief: "Can other congressmen agree?"

Hong Qiming shrugged: "They dare not disagree, at least for now, we have the strength to crush."

"As for the future...I personally have full confidence in the culture of Xia Kingdom."

Lu Yongchang's eyes were full of strange expressions.

Well, he doesn't deny that.

Even in the previous life, Xia Kingdom did not occupy a dominant position, but with its huge population and strong culture, Xia Kingdom finally turned Renlian into its own appearance.

As for this life... I think this process should be faster.

"So, what am I going to do now?" Lu Yongchang pondered for a moment and asked, "What does the chairman say?"

Hong Qiming smiled and shook his head: "No need to do anything."

"At present, you only need to develop technology with peace of mind and escape with humans."

"As for the future, you may also need to worry about extraterrestrial civilizations."

Lu Yongchang nodded silently.

"By the way, the chairman asked me to ask you, what should we do if, I mean, if we really encounter an extraterrestrial civilization in the future?"

Speaking of this question, the smile on Hong Qiming's face disappeared completely: "Professor, I need a definite answer, which is related to the future development direction of the People's Federation!"

Feeling the suddenly solemn atmosphere around him, after a moment of silence, a sharp light flashed in his eyes.

"If there are no special circumstances, there is only war!"

Chapter 149 Dark Forest

"hiss!"

Facing Lu Yongchang's murderous words, Hong Qiming gasped suddenly.