As early as last month, the colonial Frontline Institute and the Star Ring City laboratory finally found the right frequency after joint research.

Through the magic-modified seismic wave excitation device, twelve shock waves of different frequencies are continuously emitted to the ground, and a "black domain" can be created within a range of more than ten kilometers underground. In this black domain, the devil worms cannot correctly determine the direction, nor can they determine the surrounding and surface conditions, and at the same time, they will also cause strong physiological discomfort.

Experts from various countries in the laboratory call it ultrasonic fences.

Twelve seismic wave excitation devices were deployed around the colony, surrounding the entire colony with ultrasonic waves into a dodeca-shaped isolation wall. Now, with the colony as the center and within a radius of more than ten kilometers, it has become a forbidden area for devil insects.

Thanks to this, the colony development work that had been stagnant for a long time can finally be reopened.

Under the command of Captain Hong Zewei, the colonial engineering team repaired the hydroponic plantations and pastures arched by devil worms. At the same time, according to the plan of the Space Command Center, the first highly automated steel plant was established on Mars.

Mining iron ore on Mars does not require mining shafts at all.

Mars is full of iron ore.

This sentence is not false at all.

You can smell the rust when you pick up a piece of sand from the ground.

The raw materials for production are just under the feet. A newly built iron ore factory only needs to shovel truckloads of sand into the boiler to produce batches of finished steel. Most of the smelted slag is silica, and can be used as glass and concrete building materials after a little treatment.

Part of the produced steel is used for colonial construction, while the other part is made of rebar and stainless steel plates to reinforce the surface of the colonial area.

Yes, the steel on Mars is so cheap that it can be used as floor tiles to pave the road.

The engineering team responsible for the construction will first punch the steel bars into the ground, then fill them with cement, pour them into concrete foundations, and then lay a layer of high-strength stainless steel on the concrete floor. In this way, even if a drill bit is grown on the top of the heads of the devil worms, they will not be able to penetrate the floor of the colony.

Although there is an infrasonic fence, most people still feel uncomfortable when they think of the tunnels excavated by devil bugs under their feet. Even just in case, this alloy floor is absolutely necessary.

In addition, concrete has a strong sound insulation effect and can effectively limit ultrasound to the ground, which is also beneficial to the health of colonists in the colonies.

In addition to iron ore, the geological brigade where Wang Qiang is located recently discovered a carbon ore with considerable reserves in a meteorite crater ten kilometers away from the colony. This purely natural carbon ore is rare on Earth in an oxidative environment, but it seems to be very common on Mars.

Relying on graphite produced by this carbon mine, the colonies can now produce graphene independently without relying on imports from Starring City.

The steel plant and the graphene plant have been built, and now there are only two tasks assigned by the headquarters to the colony. One is to build a ground base station for space elevators on the equatorial line, and the other is the 071 project.

Now, the Star Ring Marine Corps has established an operation base above the 071 mine site. The colonial construction team has reinforced the road surface with concrete and steel. At the same time, it has also established machine gun post towers, communication base stations, accommodation barracks, garages and other facilities.

In addition, the engineering team's drilling vehicle has drilled into a tunnel that can be passed by infighting vehicles around the 071 mine site, and has reinforced the tunnel with reinforced concrete to prevent destruction from devil worms.

Drilling the tunnel into five kilometers or even deeper strata is undoubtedly a test for the construction technology of the colonial engineering team. However, they have experienced this test many times. After more than a month of hard work, the drilling vehicle finally drilled to the edge of the five kilometers of Gaia civilization ruins.

What they have to do next is to continue drilling downwards around the ruins and drilling out a spiral channel. After determining the hierarchy of the Gaia civilization database, they will dig into the ruins.

"This is Team A, we have reached the edge of an unknown area."

Following behind the drilling car and looking at the map on the holographic screen in the helmet, Zhang Hai reported to the command center about the current situation.

“Push forward.”

"Received." After ending the contact with the command center, Zhang Hai switched the communication to the team channel, set up the rifle in his hand, and aimed at the passage ahead. "All combat units should pay attention. High-density life signals were detected in front of us, and we are about to enter the danger zone. Protect the drilling vehicle, open the insurance, open the fire freely, and act."

The drilling truck continued to advance, and the engineering truck behind him pushed the rebar into both sides and welded it to death, while pouring the quick-drying concrete to reinforce the tunnel. The Marine soldiers followed closely behind, holding the Gauss rifle in their hands and carefully monitoring the front.

If the devil worm may come from a certain direction, it must be in front of the drill.

When the drill bit drilled into a rock wall, the rock in front collapsed, revealing a large area of ​​space. When the drilling car stopped, the soldiers on both sides immediately stepped forward, but no trace of the devil worm was found in this hollow layer.

Zhang Hai walked to the nearby rock wall, turned on the tactical flashlight and inspected the wall, and found the flesh-red rock blocks and the bacteria clusters growing on the surface of the rock block.

There is no doubt that this is the oxygen supply layer.

He gestured to the soldiers behind him, and Zhang Hai carefully retreated to the reinforced tunnel with the man. At this moment, a soldier accidentally discovered a strange follicle.

The dark green follicles look half a human tall. The shiny membrane can see a thin layer of colorful oil spots under the illumination of the flashlight. According to some unknown rhythm, the follicles contract and expand slightly and agitate.

I don’t know if it was because the light of the flashlight stimulated it, and its agitation speed increased slightly.

"What is this?" The rifle in his hand pointed at the insect egg. The soldier reached out and pressed it on his helmet, took a few photos and sent it to the team channel, "Report the captain, and the situation is found here."

"Devil worm eggs?" Looking at the image on the holographic screen, Zhang Hai frowned slightly and walked forward with a rifle, "No... Let the drilling car stop."

The drilling truck stopped drilling forward.

Soon, Zhang Hai re-connected with the command center.

As soon as the communication was connected, the command center asked.

"What happened? Why did the drilling car stop?"

"Reporting to the command center, this is Team A. We drilled through a hollow strata and found a large number of oxygen-making fungi and a strange insect egg... probably an insect egg." Looking at the agitating follicle, Zhang Hai sent the photos to the command center of the Expedition.

"This is the command center, we have received it and are sending researchers to the target area to take samples. Please wait here."

"Received." After hanging up the communication, Zhang Hai gestured to the soldiers behind him and pointed to both sides of the drilling car.

Before the researchers arrive, they will lay out simple lines of defense here.

"What do you think this thing will be?" Koenig said quietly in the communication channel, aiming at the insect egg nervously.

"I don't know, maybe it's a mutant devil worm? Maybe it's a new species that we have never seen before? To be honest... I have even seen that kind of thing. Even if God and the old man stood in front of me, I wouldn't feel surprised."

Listening to the sound of teammates chatting in the communication channel, Zhang Hai looked at the insect egg.

I saw that the insect egg was like a living heart, pulsing according to a special rhythm.

For some reason, looking at the insect egg, a strong sense of anxiety arose in his heart...
Chapter completed!