Wang Fei personally climbed onto the huge shield machine, checked the equipment condition up and down, and finally nodded with satisfaction and jumped down.

The appearance of the entire shield machine is a long cylinder, which is like a train to make it convenient to turn one by one.

Its diameter reaches an astonishing 24 meters, wider than the hairy crab and saber, and its length is not as long as it imagined, only about 50 meters.

The rough principle of the shield machine on the earth is to mix the residue by the knife plate on the head, then mix it into mud and transport it to the ground through the pipe.

After the mud reaches the ground, it will be separated and will return to the ground again to bring out the subsequent debris.

Some of the debris will be squeezed by the shield machine around the tunnel, making the soil layer on the wall stronger.

After the shield machine is excavated for a section, the connected equipment will install a section of pipes to support the tunnel in the tunnel.

If the shield machine wants to continue moving forward, it must rely on these fixed pipe pieces, that is, the hydraulic system will push these pipe pieces forward.

It is basically impossible to retreat. In addition to causing collapse in the front, the pipe segments at the rear need to be removed.

However, the big guy in front of Wang Fei is much more advanced.

First of all, there are tracks around the carriage behind its nose, and a cold nuclear reactor is installed inside. The power to move forward is provided by itself without leveraging force.

But in this way, the violent friction between the tracks and the ground will cause the surrounding soil to collapse. The cutting board in front may be just dug, but the track will be removed later.

Therefore, this shield machine is equipped with a very advanced waste treatment system.

The residue excavated from the knife plate will be transported to the inside of the shield machine. After screening here, it will be prepared by a special adhesive to form a material that is stronger than cement.

The 50-meter-long structure of the shield machine will pressurize the surrounding soil and rocks layer by layer, and it will be strong enough by the end.

At this time, the prepared curing material will be evenly applied to the compacted tunnel wall surface to form a solid surface that can be used for a long time.

In this way, a solid tunnel was basically completed.

During this period, only necessary resources are needed to be stored inside the shield machine, and there is no need to transport mud outwards, nor does it require subsequent equipment to lay pipe pieces.

It is very efficient and convenient to use and has a fast travel speed. It is considered a relatively basic cost-effective device in the interstellar era.

As for laser excavation equipment, it is too expensive and is generally used as a hard environment to develop precious minerals.

...

After Wang Fei determined the parts needed to repair the shield machine, he returned to the ground with Xiu Pi.

After coming up, Wang Fei ignored Xiupi's sigh of seeing the light again and went directly to the Saber and found Zhang Chaozhong.

"Mr., do you have any plans to leave this area?"

After entering the door, Wang Fei didn't see him. He just found a chair and sat down, poured himself a glass of water, and asked straight to the point.

"Haha, Comrade Xiao Wang is so straightforward!"

Zhang Chaozhong sat down with a smile and joked.

"Ha? Didn't you tell me not to be fooled? Just last night, why would I help you recall it? You praised me at that time..."

"Okay, okay, stop, I won't say anything!"

Zhang Chaozhong had a deeper understanding of Wang Fei from Wu Wenbin and Wang Hao before, but it was better to meet him than to be famous. Now he has a more thorough understanding.

"Comrade Xiao Wang, you are not a military organization, so we really don't need to be so regular. Let's communicate equally. In the future, you call me the director and I call you Xiao Wang, how about it?"

"no problem!"

While Wang Fei agreed happily, he also had some of his own judgment in his heart.

The director is willing to communicate with him on the same level. His peaceful character is one aspect, but he is more in recognition of his own strength and thanks for his past help.

Behind the bureau, there is the entire government and military system. I can't expand to the point where I really think I can be on par with the general...

"Talking about serious matters~" Wang Fei retracted his thoughts.

"I just asked you if you have any follow-up plans? We can't act separately, right? Or do you plan to act alone in the future?"

Wang Fei tentatively said nakedly.

What he was more worried about was that the advance team would have their own plans after they had a backbone.

Wang Fei and the advance team can be said to be in mutual support. Letting the advance team go alone is a huge obstacle for Wang Fei's subsequent plan.

"Haha, I haven't decided yet."

Zhang Chaozhong said slowly.

"I know, the Saber is supported by Xiao Wang, and it also helped us a lot. It is said that it is inauthentic to burn bridges after passing the river.

But our advance team has a task, and I need to find a balance between survival, development, and rescue of my compatriots.

You just arrived here and didn't know that in this mountainous area designated by the mission, at least hundreds of refugees from the earth were slaves in the hands of the raiders.

If the advance team left you, not only would I not be able to explain, but even the camp mission would not be completed, right?"

"So many more people?"

Wang Fei frowned after hearing this.

He didn't expect there were so many prisoners nearby, and he thought the rescued advance team was the big one.

If this is true, even if you take two ships from the ground, the progress of the mission will not increase to more than 80%, and the final mission will likely be the result of a draw.

"In that case, you tend to take the initiative to rescue other survivors?"

"I do have this meaning, but I don't know if you will join in Xiao Wang.

After all, your strength is an important consideration for me to make a decision…”

Zhang Chaozhong smiled and rebelled against the generals, like a successful old fox.

"Uh, I'm still too young after all..."

Wang Fei thought to himself, "I originally advised him to leave together, but it turned out that he advised me to stay and save people together... It was a hasty~"

"Ahem," Wang Fei coughed twice, relieved his embarrassment, and then said seriously.

“Can you be sure there are hundreds of survivors?”

"There must be so many people before the mission was released. Now the enemy's progress has not increased much, which means they are still alive."

Zhang Chaozhong also earnestly assured, "When we were moving nearby, we determined the locations of several larger raiders' camps, and I estimate that most of the captured Earth refugees were concentrated in it."

Seeing that Wang Fei was still thinking, Zhang Chaozhong added: "For those survivors who don't know the location, we cannot waste time searching, so I plan to clear these camps and retreat.

If the progress is not enough, then you will turn to hunting the alive plunderers, so that you should be able to collect 80% of the progress."

"Well, this is indeed a solution, I basically agree with it, but I have some immature suggestions."

Wang Fei suddenly grinned.

"It's too slow to rely on you to travel through mountains and rivers to save people. Why don't you outsource this job to me?"
Chapter completed!