"Ordinary shelter entrance"
"Upgrade plan one: increase the thickness of the protective door, improve the defense of the shelter entrance, add a new biochemical radiation decontamination room, and upgrade the required survival points to 1500"
"Upgrade plan two: add screen doors, add partition doors, add a maintenance room, upgrade the air inlet of the shelter ventilation system, and upgrade the required survival points to 1350"
Looking at these two upgrade plans, Chen Xin, who had already obtained enough supplies from the SWAT team, chose to upgrade them all without considering which plan was more suitable.
For Chen Xin, who can now get 15 survival points every day, with enough materials to reduce the consumption of survival points to 10%, the cost of upgrading by choosing both options is already beyond what he can bear. Within the range.
It's just that Chen Xin himself didn't expect that a mere oxygen box that didn't cost him a few survival points could actually provide him with two survival points every day. This was really beyond Chen Xin's expectations.
But this is not difficult to understand. After all, his upgraded algae oxygen generator not only produces oxygen, but also uses the produced biomass to ferment to produce biogas, which is used to generate electricity for fuel cells.
It is said that this piece of equipment is equivalent to the functions of oxygen generator, biomass incubator and fuel cell. It has greatly improved Chen Xin's current living conditions, so he can obtain more survival points. It's also understandable.
After choosing to upgrade all, the door of the shelter was upgraded according to Chen Xin's ideas under the power of the system to what he drew on the design drawing.
Strong and heavy protective doors, a decontamination room for radiation and biochemical decontamination, a maintenance room for parking cars and organizing equipment, and a defense corridor equipped with heavy crossbows...
Today's shelter is what a real doomsday shelter should look like, with a solid and reliable defense.
He drove up the car that was originally parked below and parked it in the maintenance room. Chen Xin also brought up the equipment he might need when going out.
The heavy protective clothing was hung in the closet in the preparation room, and the equipment and supplies needed to go out were also neatly stacked. Chen Xin looked at everything neatly in front of him, and felt quite satisfied and proud in his heart.
This is just like the sense of accomplishment you get after finally building a cabin that makes you feel safe and secure when playing Minecraft.
And what's different from the game is that this is a real world, this is a real refuge, this is a real refuge that can protect Chen Xin's safety.
By upgrading the entrance to the shelter, Chen Xin also moved the vents and shortwave antennas that originally led to the mountainside above the entrance and placed them in a small bunker made of thick reinforced concrete.
This bunker is not big, just a small space located above the decontamination room at the entrance to the shelter. It is somewhat similar to a machine gun bunker in a war game.
This is not a machine gun bunker, although in a sense it can indeed be used as a machine gun bunker as long as Chen Xin mounts a machine gun here.
However, the actual purpose of this small bunker is to protect the shortwave antenna and vents that were moved here. It is not really that Chen Xin wanted to build a machine gun bunker here.
Although it is likely to become a defense facility in future upgrades, for now it is just a bunker for shortwave antennas, and at most it serves a ventilation function.
The outside of the bunker is covered by the soil of the mountain itself, leaving only a gap about the width of a palm. It is impossible to enter the bunker from the outside. It can only be entered through the reserved passage inside the shelter.
Compared with the shortwave antenna that was just covered by a camouflage cloth and placed directly in the open air, the shortwave antenna protected by such a small bunker is undoubtedly much safer. Even if it is discovered, it will be difficult to destroy this kind of antenna placed in the open air. Antenna in a solid bunker.
As for the impact of the bunker on the antenna signal, it is not non-existent, but it is not serious. At least Chen Xin tried it, and he could still receive external signals smoothly and contact others.
The original vents also underwent new changes after being moved to the interior of the bunker. Not only did they have a protective cover and grille filter, but the ventilation pipe also had an overpressure automatic exhaust valve after entering the shelter.
This is ventilation equipment used in civil air defense projects. The principle is to use the air pressure difference generated inside and outside the shelter to form a seal, blocking the intrusion of toxic and harmful air from the outside, while also being able to discharge the air inside the shelter to ensure ventilation circulation. .
Although it sounds a bit complicated, the structure of this thing is very simple. With it, the shelter does not have to worry about external toxic and harmful substances entering the interior of the shelter along the ventilation pipe.
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At the entrance of a former shopping mall in the urban area, Qin Lan and several SWAT team members were guarding here with guns in hand.
This was originally a large shopping mall in the city, with an underground supermarket and parking lot. Before the disaster, it was planned as a small shelter, housing about 5,000 people from the surrounding communities.
The original planning of this small shelter was to allow some people to escape from a doomsday disaster. After the disaster, it would be connected to other shelters through passages and used as an underground settlement.
But now, due to the deterioration of the environment and the temporary inability to supply oxygen equipment to small shelters, the city government can only move people to other medium-sized shelters and temporarily seal this small shelter.
It is planned to wait until the passage connecting the medium-sized shelter to this place is opened in the later period, and the oxygen generation equipment is sufficient, before it can be reactivated.
Qin Lan and the others are here to help these people move. In addition to them, there are also city government staff who are responsible for the transfer.
The second batch of oxygen generating equipment was shipped in not long ago, but this batch is much smaller than the previous batch, with only four small biological oxygen generating machines.
Two of them were naturally shipped to Binhu Community and Polytechnic Institute, two medium-sized shelters that had not been allocated oxygen generating equipment before. As for the remaining two, one was given to the shelter where the armed police force was located, and the other One was given to the factory.
It is precisely because of insufficient oxygen production equipment that the city government decided to temporarily abandon all small shelters and divert all populations to medium-sized shelters.
Although the population in the small shelter is not large, only a few thousand people, the relocation of thousands of people is not an easy task. The staff sent by the city government are already a little overwhelmed, and they need to deal with various problems. deal with.
Qin Lan stood in the shooting position on the roof of the armored vehicle, holding his sniper rifle, his eyes constantly scanning the crowd, searching for possible dangers.
In this situation, anything can happen. Qin Lan and the others must put an end to any possible criminal behavior and avoid it turning into a group incident. (End of chapter)