In just one sentence, the atmosphere in the command center became colder in an instant.

At this moment, an old advertising slogan even rang in Lu Yongchang's mind.

The heart is cool and the heart is flying.

"It's been a long time...what does this mean?"

Fang Xu's slightly hoarse voice came: "Did the other party pay attention to us since the earth?"

"If this is the case, the technology level on the opposite side..."

He didn't finish his words.

But everyone present knew that this meant that, to the opposite side, human civilization seemed as humble as an ant on the roadside.

Perhaps because of the response, complicated messages were continuously transmitted from Ross 154 direction.

[According to your time algorithm, it should be 64 years ago that your detector disturbed my sleep.]

[Take a star system that is about to be destroyed as an information transfer station...]

【hehe……】

【This method is very good and very cautious.】

[In this universe, it is correct to be cautious.]

Lu Yongchang gasped suddenly.

What did he see?!

In order to hide its own coordinates, the efforts made by human civilization in the past are as clear as a piece of white paper in the other party’s eyes!

It was not just Lu Yongchang, but at this moment, the command center was already in chaos.

"Quiet!"

Lu Yongchang looked at the holographic projection in front of him with an ugly expression: "Zero, has there been other information sent to the other side?"

"Professor, there is no new information."

"Cut off all signal interfaces." Lu Yongchang issued an order without any hesitation, "start the self-test program immediately."

"Focus on checking all data sent back by the interstellar probe in the past 64 years!"

"The signal interface has been cut off." The sound of zero sounded again, "The system self-test is underway..."

Looking at the self-test progress bar in the holographic projection, Lu Yongchang's eyes were full of horror.

Something big happened!

For interstellar civilizations, the difficulty of achieving long-distance invasion is tantamount to reaching the sky in one step.

The other party just needs not to receive the messages you send. Even if you have great skills, you will not be able to hack into the enemy's civilized computer system.

Just like, no matter how capable a hacker is, he cannot hack into a computer without any network from a distance.

For interstellar civilization, before communication is established, both sides are like a computer without access to the network.

But all this will undergo a complete change with the establishment of the communication system.

This is also what Lu Yongchang is worried about.

64 years ago, the detectors sent by humans were invaded by this advanced civilization.

The other party even discovered the information transfer station carefully set by humans!

And he learned human language and mastered human calculation units...

What a horrible thing this is!

Thinking of the past 64 years, human civilization has lived under the surveillance of the other party, layer after layer of cold sweat has ejaculated behind Lu Yongchang!

"The test is completed."

“No potential danger has been found.”

Hearing this, Lu Yongchang suddenly breathed a sigh of relief.

He raised his hand, wiped the cold sweat from his forehead, and sat on the chair behind him.

"Click."

At this moment, the sound of the electromagnetic adsorption device seemed particularly loud.

"Professor, the other party sent another message. Did you receive it?"

Zero asked in a plain tone.

Lu Yongchang didn't speak at the first time.

After thinking carefully, he asked softly: "Zero, if the other party has a terror, can you detect and stop it? What is the probability of success?"

“…”

After a brief wait, Zero's response came: "Based on the simulation calculation, I am 99.9% sure to prevent the other party from hacking."

Lu Yongchang raised his eyebrows, and a hint of surprise flashed in his eyes: "So high?"

"Yes, professor." Zero said again, "I have a full home field advantage and can even physically cut off the source of the hacking signal."

"That……"

After thinking for a moment, Lu Yongchang said, "Open the signal interface and receive the information sent by the other side."

[No need to be nervous. I just used the detector you sent to learn some basic information and did not do anything to your central computer system.]

[If you don't believe it, you can check the central computer system.]

【Believe me, I have no malice.】

Looking at the Chinese characters appearing in the holographic projection, Lu Yongchang sneered.

Is this called no malice?

They all sneakily learned all the basic information and said that they had no malicious intentions?

The dog would shake his head when he heard this!

Although I thought so in my heart, Lu Yongchang carefully edited a new string of information in a respectful tone.

[Dear higher civilization, I'm sorry we disturbed your rest.]

[We believe that with your ability, we should be disdainful of taking action against our small second-level civilization.]

【But, we have a few doubts and would like to ask you to answer.】

[Who are you? What level of civilization do you belong to? What do we need to do?]

【If there is any offense, please forgive me.】

...

"Yongchang, these questions..."

"Wouldn't it be too straightforward?"

Fang Xu frowned and asked in a low voice: "Will it cause the other party's dissatisfaction?"

After experiencing the previous conversation, the weight of this unknown civilization in everyone's hearts was infinitely increased.

no way.

The opponent has this strength.

Before humans discovered him, he had already figured him out clearly.

Once you annoy the other side...

Human civilization, I think there will be no good results to eat.

Lu Yongchang slowly shook his head: "No."

"Since the other party chooses to communicate with us, it will inevitably tell us some necessary information."

As he said that, he pressed the send button in front of him.

...

After a few dozen seconds.

The familiar 1420 MHz signal came from the Ross 154 direction.

【Interesting...you actually know the civilization hierarchy system.】

[It seems that you should have encountered other civilizations.]

【Let me guess.】

【Have you just experienced a war?】

In the holographic projection, Chinese characters pop out one by one.

Lu Yongchang's face changed slightly.
To be continued...