Chapter 86

"Ordinary shelter entrance"

"upgrade scheme 1: increase the thickness of the protective door, enhance the defense of the shelter entrance, add biochemical radiation decontamination room, upgrade the required survival point of 1500"

"upgrade scheme 2: increase the screen door, increase the partition door, add the servicing room, upgrade the ventilation system air inlet of the shelter, upgrade the required survival point of 1350"

look at these two options Chen Xin, who has already obtained enough materials from the special police force, did not consider the more appropriate plan, so he chose to upgrade all of them.

For Chen Xin, who can now obtain 15 survival points a day, with sufficient materials to reduce the consumption of survival points to 10%, the consumption brought about by the upgrade mode of selecting all two schemes is already within his range.

It's just that Chen Xin didn't expect that an oxygen making box that didn't consume a few survival points could provide him with two survival points every day, which is beyond Chen Xin's expectation.

However, this is not hard to understand. After all, his upgraded algae oxygen generator not only produces oxygen, but also uses the biomass produced to ferment to produce biogas for fuel cell power generation.

That is to say, this 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 it is understandable that he can obtain more survival.

After choosing all the upgrades, the gate of the refuge is upgraded to the way he drew on the design drawing according to Chen Xin's idea under the power of the system.

Strong and heavy protective door, decontamination room for radiation and biochemical decontamination, servicing room for parking cars and sorting equipment, defense corridor with Heavy Crossbow

Today's refuge is like a real doomsday refuge, with a solid and reliable defense.

He drove up the car that was originally parked below and parked it in the servicing room. Chen Xin also brought up the equipment that he might use when going out.

Hanging heavy protective clothing in the wardrobe of the preparation room, all kinds of equipment and materials needed to be carried out are also stacked in order. Chen Xin looks at the neat things in front of him with a sense of satisfaction and pride.

It's like the sense of accomplishment you get when you play in my world and finally build a cabin that makes you feel safe and secure.

And different from the game, this is the real world, this is the real refuge, this is the real refuge that can protect Chen Xin's safety.

Through the renovation and upgrading of the entrance to the refuge, Chen Xin also moved the vent and shortwave antenna that originally led to the hillside to the top of the entrance and put them in a small bunker made of thick reinforced concrete.

This bunker is not big, just a small space. It is located above the decontamination room at the entrance of the refuge. It is similar to the machine gun blockhouse in war games.

This is not a machine gun bunker, although in a sense, as long as Chen Xin sets up a machine gun here, it can really serve as a machine gun bunker.

However, the actual function of this small bunker is to protect the shortwave antenna and air vent moved here. It's not true that Chen Xin wants to build a machine gun bunker here.

Although it is likely to become a defense facility in the future upgrade, now it is just a shelter for short wave antennas, and at most it will play a role of ventilation.

The outside of the shelter is covered by the soil of the mountain itself, leaving only a gap about palm wide. It is impossible to enter the shelter from the outside, but only through the channel reserved inside the shelter.

Compared with the shortwave antenna which was just covered by camouflage cloth and placed directly in the open air, the shortwave antenna under the protection of such a small shelter is much safer. Even if it is found, it is difficult to destroy the antenna which is placed in a solid shelter.

As for the influence of the bunker on the antenna signal, it's not without it, but it's not serious. At least Chen Xin tried it, and he can receive the external signal and contact others smoothly.

After the original vent was transferred to the shelter, there were new changes. Not only the protective cover and grille filter were added, but also an overpressure automatic exhaust valve was added after the vent pipe entered the shelter.

This is the ventilation equipment that will be used in civil air defense engineering. The principle is to use the air pressure difference between the inside and outside of the shelter to form a seal, block the invasion of toxic and harmful air outside, and discharge the air inside the shelter to ensure the ventilation cycle.

Although it sounds a little complicated, the structure of this thing is very simple. With it, there is no need to worry about external toxic and harmful substances entering the shelter along the ventilation pipe.

Qin LAN and several special police officers are holding guns at the gate of an old shopping mall in the urban area.

This is a large shopping mall in the city. There is an underground supermarket and a parking lot. Before the disaster, it was planned to be a small shelter, in which about 5000 people living in the surrounding community lived.

The plan of this kind of small shelter was originally intended to let some people escape the doomsday disaster here, and connect other shelters with passageways after the disaster, so as to be used as an underground residential area.But now because of the deterioration of the environment and the temporary inability of oxygen generation equipment to supply small shelters, the city government can only transfer people to other medium-sized shelters and temporarily seal up the small shelters.

It is planned to wait until the medium-sized shelters are connected to this area, and the oxygen generation equipment is surplus, and then it will be reopened.

Qin LAN, they are here to help these people transfer, in addition to them, there are city government staff in charge of the transfer.

The second batch of oxygen generating equipment was brought in not long ago, but this batch is much less than the previous batch, with only four small biological oxygen generating machines.

Of course, two of them were transported to Binhu community and Polytechnic College, two medium-sized shelters that had not been assigned oxygen generation equipment before, while the remaining two were given to the shelters where the armed police were located, and the other one to the factories.

It is also because of the lack of oxygen production equipment that the municipal government decided to temporarily abandon all the small shelters and all the population diversion channels and medium-sized shelters.

Although there are only a few thousand people in the small shelters, the relocation of thousands of people is not an easy job. The staff sent by the city government are already in a mess, and they need to deal with all kinds of problems.

Qin LAN stands on the shooting position of the armored roof, holding his own sniper gun. His eyes are constantly patrolling the crowd, searching for possible dangers.

Now in this case, anything can happen, Qin LAN, they must put an end to any possible criminal behavior, to avoid evolving into a group event.

www.novelhall.com , the fastest update of the webnovel!