"Click!"

Hit the brakes, follow the GPS positioning, and he has arrived at his destination. Luo Xu turned off the engine and pulled out the key, pulled up the handbrake, opened the car door and walked out, it was as dark as ink outside, and he didn't want to see anything from a few meters away, and it was very convenient to do things.

As soon as the eyeballs moved, the night vision option of the sunglasses was selected, the night vision function was activated, the dark night instantly turned into a world of green light, and the outlines of the surrounding trees were also prominently revealed.

337 meters, which is not very far. Luo Xu exhaled exhaust fumes, rubbed his palms, and left the sparse dirt road, carefully descending a steep slope with a slight slope, groping towards the large woods below. Speaking of which, because the cube is very important, it is impossible for him to tell anyone its secrets, so every time he does something secret, he can only do it himself, fortunately, he is a little lucky, he doesn't feel anything, as long as he protects the secrets of the cube, there is no problem if he is ten times more tired.

After going down this steep slope and entering the woods, there were some "murmuring" sounds around from time to time, Luo Xu vigilantly pulled out his pistol, there are no dangerous animals in this place, but if a rabbit suddenly runs out, it will also scare people. A few minutes later, according to the guidance of the map, Luo Xu walked through this small woods and came to a river, this small river is about ten meters wide, and the sides are full of muddy beach. Luo Xu avoided the riverside beach and continued to walk east along the river forest, and this time it didn't take long for a small hill with a height of no more than seventy or eighty meters to appear in front of Luo Xu.

With his destination just ahead, Luo Xu quickened his pace, passing through the thorny bushes and soon reaching the foot of the mountain.

"Bob, is this it?"

"Yes, Sir, you've arrived at your destination." Bob's voice came from the headphones, apparently confirmed.

"Alright, let's get moving."

Luo Xu is also very satisfied with this location, sparsely populated, no one lives within a radius of dozens of miles, and no one is idle to come here, more importantly, this base to be built will be built in accordance with the original design, hundreds of meters deep underground, even if someone comes to the base, it will definitely not be able to find the existence of the base, let alone any reconnaissance satellites, all play eggs.

The light film leading to Base 17 quickly unfolded in Luo Xu's hands, exuding a faint blue and mysterious brilliance in this pitch-black wood, and the engineering machines that had been prepared on the other side immediately began to pass through the light film after receiving the order. As you can see, with the appearance of this huge construction machine, the radius of the light film also expanded, and soon the front end of the TBM (Tunnelboring Machine) with a diameter of 14 meters appeared at the bottom of the hillside.

This parallel world TBM is a giant monster created by Bob's recent collection of western industrial production lines, with a diameter of 14 meters at the front end and a total length of 155 meters, powered by a large fusion nuclear battery, which can dig 12,500 meters of tunnel in 24 hours under the hard rock excavation of mountain tunnels, which is more than 100 times more powerful than the current state-of-the-art tunnel boring machine. This construction machinery, called the monster manufactured by the science and technology industry is not an exaggeration, this is not the largest model, in the design drawing, the largest model diameter of more than 50 meters, people standing under the roadheader as small as ants, this huge monster is easy to open the mountain and rubble, just to provide it with an astronomical amount of electricity.

Under the overall command of Bob, the rotary cutter at the front end of the TBM instantly crushed the rocks on the hillside, directly twisted and crushed and drilled into the rock formation, Luo Xu was watching the inhalation, the TBM had advanced several meters, and the whole process was almost audible, all the rocks were quietly crushed into slag by the rotary cutter, and then twisted into the screw conveyor, and the soil and gravel were transported to the other side of the world by the pipeline.

The convenience of TBM is not only that, this fully mechanical and fully automated construction method, in the excavation process, through the shield shell and segments to support the surrounding rock formation to prevent collapse, and in the process of advancing, the equipment at the middle end of the equipment begins to assemble prefabricated concrete segments, directly forming a complete tunnel, it can be said that the integrated molding is very convenient. Luo Xu took a fancy to this, he had to hurry up, take advantage of the night to build the tunnel first, and then disguise it, the time was not very abundant, of course he needed this kind of convenient tool.

All the construction was fully taken over by Bob, Luo Xu was bored on the spot, and after smoking a few cigarettes, he simply returned to Base 17 and came to the base to see the construction situation. The area around the airport is still brightly lit at night, and a transport plane lands and takes off every few tens of minutes, and after this period of perfect organization, 43 airports have been found in Nevada, 25 of which can be used after repairs, and 107 military facilities have been found, in addition to the mothballed weapons, most of the exposed weapons have become unusable. These military facilities were of little value, and there was no need for Luo Xu to repair them so closely, so he asked Bob to select the valuable equipment and weapons among them and transport them back by transport plane.

On the West Coast of the United States, the number of airports that are still worth repairing has been completed, with a total of 21 airports in 13 cities. What makes Luo Xu particularly happy is that in an accidentally discovered military base, there is a mothballed C-380 strategic transport aircraft, this transport aircraft that can transport 1200 tons of cargo has 12 turbofan engines, Airbus's A380 is as young as a child in front of this transport aircraft, you can imagine how huge this metal monster is, it can fly on the earth, I have to say that it is a miracle.

Resources continue to be integrated and transported, and the airport above the No. 17 base is the center, and the black pressure of the factories and warehouses lined up on the fan surface extends out, and I don't know how long the construction scope will be in the end. Luo Xu looked at it and sighed, it was not that he didn't want to restart the surrounding cities or military bases, the problem was that it was really unnecessary, according to the results of continuous detection, the North American continent has determined that there are no traces of human existence, and the reports sent back by the reconnaissance planes flying to the South American continent and the Asian continent are not optimistic, the cities there are also like North America, desolate, the whole city is surrounded by plants, gradually disappearing in silt and floods, and there is no trace of human activity.

Human beings, this kind of intelligent creatures that once dominated the world and whose activities were all over the world, disappeared completely in this parallel world, no matter what the reason, its power made Luo Xu sweat coldly. With such advanced technology, so many weapons, and a human being with such terrifying strength, they disappeared without even a trace without even resisting or even noticing, is this magic or a joke? Luo Xu doesn't know, at least now, it seems that the world after the disappearance of human beings is very safe, and his activities have not encountered the slightest danger is a proof, in fact, compared to worrying about the unknown power all day long, Luo Xu might as well be careful to be hit by a car when he goes to the street, the probability is much greater.

On this side of the light film, the huge rear body part of TBM is still entering the light film, obviously the excavation is still in progress, a large amount of gravel and soil was abandoned on this side of the open space by pipeline transportation, and it didn't take long for a mountain of dirt to be piled up, and the speed was so fast that Luo Xu was staggered.

Time passed gradually, and after half an hour, the TBM had dug a 300-meter-long tunnel 15 degrees downward, and the initial construction was completed, and the TBM slowly returned the light film from the tunnel. The next step was to bury the excavated hole, which was a trivial operation that took little effort to backfill the soil. From the outside, it is not much different from the original rock formation, but behind the disguised rock formation, there is a hydraulic alloy door that no one can open except Luo Xu. The first layer of the gate is covered with stainless steel plate with a thickness of 450mm, the second layer of the main door plate is a high-density alloy steel plate with a thickness of 150mm, the third layer is a high-manganese steel plate with a thickness of 300mm, the fourth layer is a synthetic material with a thickness of fire prevention, anti-corrosion, anti-electric corrosion, high temperature resistance and low temperature resistance, and the fifth layer is a reinforcing plate with a thickness of 200mm alloy steel plate. In addition to face recognition and palm print recognition, this gate also adopts a reading power system that can last for 48 hours, which is not only fireproof, anti-smashing, anti-flame cutting, and even anti-drilling and impact-proof, even the world's most advanced armor-piercing bullet does not want to penetrate this gate, it is more than enough to prevent nuclear explosion.

Sitting in the tunnel car, the tunnel car will soon come to the end of the tunnel, from which the excavation of a deep shaft tunnel at a depth of 100 meters will begin. In Bob's blueprints, the site is partially honeycombed, with a 100-meter-deep tunnel leading to the first level of the underground base, followed by a 30-meter-deep tunnel to the larger second level, then a 60-meter-deep shaft to the third level, and finally a 90-meter-deep tunnel to the fourth. Each floor is perpendicular to each other, and the further down the area becomes, the larger the area, and finally reaches the fourth floor, which is more than 360 meters underground, which can be said to be connected layer by layer, and the structure is tight.

One of the advantages of this design is that once an accident occurs, the connection between the accident layer and other levels can be immediately interrupted, which effectively prevents the spread and spread of the accident. Moreover, this hive design also involves secrecy measures, and each layer has a different degree of secrecy, so that the relevant authorized personnel cannot enter the advanced level to prevent the leakage of secrets.

In general, the design is more reasonable, according to Bob's calculations, after having a tunnel boring machine, this kind of base can barely be built in more than half a month, this speed is really amazing, but think about it compared to the canyon base, the construction area is much smaller, although the construction difficulty increases, after all, there is also equipment improvement, so the completion speed can be completed in half a month.

"Well, this base should be named, what should it be called?"

Rubbing his chin, Luo Xu's eyes lit up: "The code name of the canyon base is Z-1, and here Z-2, well, not bad, not bad." ”