Chapter 85 - 84 Mo Qingyan’s Oxygen Generator

Words : 1177 Updated : Sep 12th, 2025

Chapter 85: Chapter 84 Mo Qingyan’s Oxygen GeneratorThere’s really no need to make the passage into a floor door. After all, the first two doors have been breached, and the significance of making the passage a hidden door isn’t great. If someone has already come in, how could they miss a door? Moreover, turning the door into a floor door and altering the passage structure seems to make it inconvenient for transporting supplies. Since no other modifications are planned, this blueprint for the main door can be considered complete. Looking at the finished CAD design on the computer, Chen Xin couldn’t help but feel a bit sentimental. This was a skill he taught himself when he was seeking his first job just after graduating from college. Over the years, he hadn’t drawn any blueprints in a long time. Originally, Chen Xin thought that after the apocalypse came, he wouldn’t need to draw blueprints anymore. Yet he didn’t expect to use this skill again so soon. But reality is always more convoluted and complex than we imagine; you never know when fate will surprise you with an unexpected twist. Chen Xin couldn’t tell whether this was a pleasant surprise or a shock, so he closed the laptop, placed it on the bedside table, checked that the pistol in the bedside cabinet was within easy reach, and then he turned off the bedroom light, covered himself with the blanket, and closed his eyes. Tomorrow, he still has to upgrade the main door and make an oxygen machine for Mo Qingyan. There’s still a lot to do. However, this feeling of being busy isn’t bad for Chen Xin. While Chen Xin was sleeping, the bedroom still had a faint green glow. That was the algae oxygen machine in the corner working. —————————————————— Waking up early, Chen Xin was already sitting at the workbench. He planned to make the oxygen machine for Mo Qingyan first. The materials Ding Ning brought were fairly sufficient, enough for making the oxygen machine. The only troublesome part was that the glass she brought, though kept as intact as possible, still had many fragments that needed to be cut and pieced together. Actually, if there could be a furnace to melt this glass and remake it into the required shapes, it would be the best way to utilize these glass fragments instead of just gluing them together. But for Chen Xin, having glass as the raw material is enough. With the help of the system, he can easily process the glass into any shape he desires. By the side of the workbench, the original broken glass has been reshaped into a tall annular cylinder, and Chen Xin is making the base. The base of this microalgae oxygen machine is key. The glass cylinder is merely a container, and its exact shape doesn’t matter. But an annular cylinder is relatively more efficient in utilizing light. On the base, pipes and a vacuum pump need to be installed to inject carbon dioxide into the annular cylinder, stimulating the algae to carry out photosynthesis. Therefore, the base should be equipped with ring-shaped pipes, and an air pump should be used to pump carbon dioxide into the pipes, allowing it to enter the annular cylinder through small openings in the pipes. However, extracting high-purity carbon dioxide is complicated and somewhat dangerous. So Chen Xin directly uses ordinary air here, letting the base draw in the surrounding air directly. As for the supplementary light, it’s installed on the top cover because the annular cylinder is placed vertically. Dead algae would accumulate at the bottom, which may hamper light penetration. With various tools on the workbench and the system-upgraded oxygen machine in the bedroom as a reference, making this oxygen machine for Mo Qingyan was quick. After all, the structure itself is quite simple, and the technology is relatively uncomplicated. With the system’s assistance, Chen Xin quickly assembled everything together. Compared to the system-upgraded oxygen machine in the bedroom, the one Chen Xin made manually looks rougher. But apart from that, there isn’t much difference, and it’s sufficient for Mo Qingyan’s use. Therefore, after making the oxygen machine, Chen Xin did not spend survival points to upgrade this one and planned to give it to Mo Qingyan as is. After placing the completed oxygen machine aside, Chen Xin checked the time and decided to have lunch first, take a break, and then upgrade the main door in the afternoon. Although it was just about confirming the upgrade, Chen Xin didn’t intend to rush to finish it. In the shelter, there isn’t much to do every day, and Chen Xin didn’t want to finish everything at once and then have nothing to do other than play games. Of course, Chen Xin wasn’t truly without tasks. Daily greenhouse maintenance couldn’t be skipped. However, as crops enter the growth phase, he only needs to ensure water and light supply to maintain the greenhouse’s operation. As for common pest and disease control in typical greenhouses or planting sheds, Chen Xin naturally paid close attention. But, whether it’s the quality of the seeds he bought or the system-upgraded greenhouse’s black technology, Chen Xin hasn’t encountered any crop diseases or pests so far—all the crops have been growing healthily. The drought-resistant rice he planted has now entered the booting phase, developing from the young panicle stage, which will last about thirty days. According to the growth cycle, in a few days, these drought-resistant rice plants should enter the maturation phase and begin to flower. Needless to say, Chen Xin had never farmed before. After he really started planting drought-resistant rice, he realized that the so-called two-crop-a-year system was merely because of environmental and climatic constraints. If inside a planting greenhouse, not to mention two crops a year, he could even have three or four. As a result, Chen Xin discovered that after expanding the greenhouse to its current 200 square meters, using half of the land for planting drought-resistant rice could yield about 600 jin of rice a year. Although it’s not much, it’s enough to sustain Chen Xin’s own consumption as a staple food. If Chen Xin upgraded the greenhouse further, switching the current single-layer hydroponic setup to a multi-layer system and used all the space for vegetable cultivation, while reserving land for drought-resistant rice, his production could support one to two more people. As for further upgrades, developing an aquaponic system or raising fish, chickens, or rabbits could support more people’s survival needs. Moreover, Chen Xin could exchange vegetables for food with the SWAT team now. Although the food Qin Lan brought from their shelter was lacking both in taste and texture, at least it was food that could be eaten, which is considered quite good in the current times. Speaking of food, Chen Xin decided after some thought to eat the mushroom and rat meat Qin Lan brought for lunch today, and keep the canned meat from Mo Qingyan for later. After all, rat meat is currently available, while pork’s next appearance is uncertain.

Chapter 85 - 84 Mo Qingyan’s Oxygen Generator

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