Chapter 86 - 85 Upgrading the Gate

Words : 1087 Updated : Sep 12th, 2025

Chapter 86: Chapter 85 Upgrading the Gate"Regular shelter entrance" "Upgrade Plan One: Increase the thickness of the protective door, enhance the defense of the shelter entrance, add a biochemical radiation decontamination room; upgrade requires 1500 survival points" "Upgrade Plan Two: Add a shielding door, add a partition door, add a preparation room, upgrade the air intake of the shelter’s ventilation system; upgrade requires 1350 survival points" Seeing these two upgrade plans, Chen Xin, who had already acquired sufficient materials from the SWAT team, didn’t consider which plan was more suitable and chose to upgrade everything. For Chen Xin, who now earns 15 survival points a day, the cost of choosing both upgrade options, with ample materials reducing survival point consumption to 10%, was within his acceptable range. Chen Xin was surprised that an oxygen generator, which barely consumed a few survival points to make, could provide him with two survival points every day, which exceeded his expectations. However, this is not hard to understand since, after upgrading, his algae oxygen machine not only produces oxygen but also generates biogas through biomass fermentation for fuel cell power generation. This means that this single piece of equipment functions as an oxygen machine, biomass cultivator, and fuel cell, greatly improving Chen Xin’s current living conditions, so gaining more survival points is understandable. After choosing to upgrade everything, the shelter’s door was upgraded into the design Chen Xin had drawn on the blueprint under the system’s power. A sturdy and heavy protective door, a decontamination room capable of handling radiation and biochemical exposure, a preparation room for parking vehicles and organizing equipment, a defensive corridor equipped with a heavy crossbow... The current shelter finally looked like a true doomsday shelter, with a solid and reliable defense. Chen Xin drove up the vehicle that was originally parked below and parked it in the preparation room, also bringing up equipment that he might need when going out. He hung the heavy protective suit in the closet of the preparation room, neatly arranged all the equipment and supplies needed for outings, and felt a sense of satisfaction and pride looking at the orderly scene in front of him. It’s like playing Minecraft and finally building a little house where one feels safe and secure, achieving that kind of accomplishment. And, unlike the game, this is the real world; this is a real shelter that can truly protect Chen Xin’s safety. By upgrading the shelter entrance, Chen Xin also moved the original ventilation outlet and shortwave antenna from the middle of the mountain to the top of the entrance, placing them in a small bunker made of reinforced concrete. This bunker isn’t large, just a very small space located above the shelter’s decontamination room, somewhat resembling a machine gun bunker in war games. However, this isn’t a machine gun bunker; although, in some sense, if Chen Xin sets up a machine gun here, it could indeed be used as one. The actual function of this small bunker is to protect the relocated shortwave antenna and ventilation outlet, not for actually setting up a machine gun bunker here. Even though this location may be upgraded into a defensive facility in the future, for now, it only serves as a bunker for the shortwave antenna, with a potential ventilation function at most. The bunker is covered by the mountain’s soil, with only a palm-width gap, inaccessible from the outside and only reachable through the shelter’s internal passage. Compared to the shortwave antenna originally just covered by a camouflaged cloth and left in the open air, the antenna is unquestionably much safer under the protection of such a small bunker. Even if discovered, it would be hard to damage when housed in such a solid bunker. As for the impact of the bunker on the antenna signal, it’s not nonexistent but not severe. At least Chen Xin tested it and found he could receive outside signals smoothly and communicate with others. The original ventilation outlet, moved inside the bunker, has also changed, adding protective covers and grille filters. After entering the shelter, the ventilation duct also acquired a pressure-relief automatic vent valve. This is ventilation equipment used in civil defense engineering, using the pressure difference between inside and outside the shelter to create a seal, blocking toxic and harmful air from outside while allowing the shelter’s internal air to exhaust, ensuring ventilation cycle. Although it sounds complex, its structure is straightforward. With it, the shelter doesn’t have to worry about external toxic and harmful substances entering through the ventilation duct. ──────────────── At an originally existing mall entrance in the city, Qin Lan and several special police officers were guarding with guns. This was initially a large mall in the city, with an underground supermarket and parking lot, planned pre-disaster as a small shelter, housing about five thousand people from the surrounding area. The planning of such a small shelter was originally intended to allow some citizens to avoid doomsday disasters there and, post-disaster, connect passages to other shelters, serving as an underground settlement. But now, due to environmental deterioration and the temporary inability to supply oxygen equipment to small shelters, the city government had to transfer residents to other medium-sized shelters and temporarily store this small shelter. They plan to reopen it later when passages connecting this place to medium-sized shelters are accessible and there’s surplus oxygen equipment. Qin Lan and others were there to assist the residents with relocation, along with city government personnel overseeing the transfer. The second batch of oxygen equipment arrived not long ago, but there were far fewer in this batch than the previous one, with only four small bio-oxygen machines. Two of these naturally went to the Lakefront District and Polytechnic College, two medium-sized shelters that hadn’t received oxygen equipment before, and the remaining two went to the Armed Police Force’s shelter and a factory. The city’s government decided to temporarily abandon all small shelters and relocate all the population to medium-sized shelters due to the insufficient oxygen equipment. Although the population in small shelters isn’t large, only several thousand, transferring and accommodating them is no easy task. The city government staff is already overwhelmed, with various issues needing resolution. Qin Lan stood on the shooting position on top of an armored vehicle, setting up her sniper rifle, constantly scanning the crowd, searching for potential threats. In such situations, anything could happen, and Qin Lan and her team must prevent any possible criminal acts to avoid escalating into mass incidents.

Chapter 86 - 85 Upgrading the Gate

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