Lu Yongchang's words obviously shocked Cao Liangcai.

"Professor Lv?"

"Are you sure you want to let the three astronauts take such a big risk?"

"Or... or let them come back, let's make a long-term plan?"

Lu Yongchang looked at the data on the report with a gloomy face.

Danger is certainly there.

After all, no one knows what the black circle is.

If it is a high-intensity radioactive substance...even if it is protected by a space suit, these three astronauts will have to explain it to the moon.

However, the current situation facing Xia Kingdom is completely unavailable for them to make long-term plans!

Lu Yongchang gritted his teeth, and a trace of determination flashed in his eyes. Then, he gently pressed the radio communication button.

"This is the ground command center, please answer when you receive it!"

...

Bai Yixuan stared at the black concentric circle in the crater, and a chill came out from behind.

"You guys say, will this be a trace left by alien civilization?"

silence.

There was no response in the team's voice.

After a long time, Hong Fan's unique hoarse voice rang in the radio channel: "It should be."

"Maybe, we are now being monitored by this alien civilization..."

Xia Wanyi, who was beside her, shivered suddenly and subconsciously looked up at the sky.

It was pitch black.

Apart from the starlight, she could not see anything strange.

"laugh……"

Just as Bai Yixuan was about to say something, a sound of electric current came from the radio.

"This is the ground command center, please answer when you receive it!"

Bai Yixuan's expression suddenly became a little serious: "Bai Yixuan received it, please speak!"

After a few seconds of delay, a slightly tangled voice from Lu Yongchang came from the radio: "Captain Bai, after technical analysis, we have basically confirmed that the black concentric circle pattern in front of you is an artificial object."

Bai Yixuan's pupils dilated slightly and his breathing became a little quicker: "Then... Professor Lu, what do we need to do?"

The large amount of adrenaline secretion made his voice look a little hoarse.

Lu Yongchang's sigh came from the radio.

"Captain White, we need to analyze the truth about this black circle, so I hope you can check it out on the black circle."

"Of course, this is not a mandatory requirement."

“After all, we don’t know if it’s dangerous.”

"Once danger occurs, maybe..."

Speaking of this, Lu Yongchang paused suddenly: "So, everything follows the principle of voluntary."

Bai Yixuan's breathing became more and more rapid.

He understood what Lu Yongchang said.

After all, they are on the moon, 400,000 kilometers away from the earth.

Once any accident occurs, their ending will be basically destined.

"Professor Lu..." Bai Yixuan's Adam's apple trembled slightly, "I'm willing to check it out."

"Okay." Lu Yongchang's voice was full of complexity, "Xia Guo, I will remember you!"

"If something really happens, I promise you in the name of the General Space Administration that your relatives will receive the best treatment!"

Bai Yixuan took a deep breath, turned his head to look at the two teammates beside him, and smiled easily.

"You two, just stay here and help me pull the safety rope."

"If something happens, just pull me back."

Bai Yixuan's words were transmitted to the ears of two teammates through radio.

Xia Wanyi's eyes instantly turned red: "Captain, why don't you...don't go?"

Hong Fan hesitated for a moment and said, "Captain, I'll go with you. If something happens, I can help you."

Faced with the dissuasion of the two teammates, Bai Yixuan chuckled and shook his head: "This is already a second type of contact, and the danger is very high."

"As the captain, this is my duty. You two, just stay by your side."

As if he noticed that the atmosphere was too solemn, Bai Yixuan smiled and patted Hong Fan on the shoulder: "What? You don't want to steal my military merits, right?"

"I tell you boy, there's no way!"

After saying that, Bai Yixuan tied the safety rope on the lunar rover to his waist, turned around and walked towards the crater!

...

The crater is very small, and the slope of the crater wall is not very large.

Bai Yixuan jumped to the bottom of the pit in three steps and walked carefully towards the black circle in the center of the crater.

"Professor Lv, can you see it?"

Just in case, Bai Yixuan stopped and asked softly.

A few seconds later, Lu Yongchang's voice came: "I can see that the camera is working normally, you can continue to move forward."

Bai Yixuan walked very slowly, and it took half an hour to get a distance of hundreds of meters.

Looking at the outermost black circle less than one meter away from him, Bai Yixuan was slightly stunned: "I can't believe it..."

"What's wrong?" Lu Yongchang, who was 400,000 kilometers away, immediately asked.

"Is this...glazed substance?" Bai Yixuan slowly lowered his body and reached out to touch the black circle.

Seeing this scene from afar, Hong Fan couldn't help but tighten the safety rope in his hand.

He is ready.

Once something strange happens, he will pull Bai Yixuan back directly!

The researchers on Earth were also worried.

Bai Yixuan's right hand gradually touched the black matter on the ground.

Nothing happened.

He rubbed his fingers gently.

Even with thick space suit blocking, he noticed that the ground near the black circle was obviously much smoother than the area next to it.

"Professor Lu is a bit like the moon dust that solidifies after being melted by high temperature."

"...Received." Lu Yongchang's solemn voice sounded, "Captain Bai, please help me dig some samples."

"Also, I need detailed modeling data for this crater!"

...

Two hours later.

Detailed modeling data and sample photos of the crater were sent back to Xiaguo.

Looking at the clear photos on the computer in front of him, Lu Yongchang sighed deeply.

"Professor Lv, the President of Congress is here!"

Cao Liangcai's reminder came from the side.

Lu Yongchang hurriedly stood up and looked towards the gate.

Congressman Lee walked towards him with a sharp look: "Yongchang, what's going on?"

"I heard that I have discovered traces of extraterrestrial civilizations?"

Faced with the question from the Chairman of the Council, Lv Yongchang nodded slightly, with a bit of bitterness in his eyes: "Chairman of the Council, I'm afraid it's true."

As he spoke, he turned his body sideways and showed the picture on the computer to Councillor Lee.

"According to my speculation, this concentric circle pattern is likely to be a trace left by the high temperature when the Hall thruster is started."

"Considering the size of the engine nozzle, there is only the possibility of extraterrestrial civilization."

Congressman Lee's expression became more and more serious.

"Apart from this trace, are there any traces of other extraterrestrial civilizations found?"

Lu Yongchang slowly shook his head.
Chapter completed!