Doomsday Bunker Upgrade

　　 There is really no need to make the corridor into a floor door. After all, the first two doors have been broken through. It is not meaningful to make the corridor into a concealed door. Can someone else enter and still find a door?

　　 And the door is made into a floor door. After changing the structure of the corridor, it seems that it will become inconvenient to carry materials.

　　 Since I don't plan to move any other places, the blueprint for this gate is ready.

　　 Looking at the CAD design drawings made on the computer, Chen Xin couldn't help but feel a sense of emotion. This was the skill he learned when he got his first job when he just graduated from university. It has been a long time since he drew drawings for so many years.

　　 Originally, Chen Xin thought that after the end had come, he would no longer draw drawings, but he didn't expect to use this skill again so soon.

　　 But reality is always more bizarre and complicated than we imagined. Maybe fate will give you an unexpected surprise.

Chen Xin couldn’t tell whether it was a surprise or a fright. He closed the laptop again, put it on the bedside, checked the pistol in the bedside table and placed it in the place where he could get the most easily. Then Chen Xin went out. I turned off the bedroom light, covered the quilt and closed my eyes.

　　 Tomorrow, he will have to upgrade the door to make an oxygen generator for Mo Qingyan. There are still many things.

　　 But this feeling of fulfillment is not bad for Chen Xin.

　　 When Chen Xin fell asleep, there was still a dim green light in the bedroom. It was the algae oxygen generator in the corner that was working.

　　——————————————————

　　 Chen Xin, who woke up early, is already sitting in front of the workbench. He plans to prepare the oxygen generator for Mo Qingyan first.

　　 The materials sent by Ding Ning were quite sufficient, and the oxygen generator was enough. The only trouble was that although the glass she brought was guaranteed to be in one piece as much as possible, there were still a lot of broken glass that needed to be cut and spliced.

　　 In fact, if there is a melting furnace to melt the glass and remake it into the required shape, it is the best use of the broken glass, instead of using glass glue to stick them together.

　　 But for Chen Xin, he only needs glass as a raw material. With the help of the system, he can easily process the glass into whatever he wants.

　　 Next to the workbench at this time, the original broken glass has been reshaped into a tall circular straight tube, and Chen Xin is making the base.

　　 This kind of microalgae oxygen generator base is the key. The glass straight tube is relatively just a container. It doesn't really matter what shape it is made of, but the circular straight tube is relatively efficient in using light.

　　 Pipes and vacuum pumps need to be installed on the base to charge carbon dioxide into the circular straight cylinder to stimulate the photosynthesis of microalgae.

　　 Therefore, the chassis should be laid with a ring-shaped pipe, and an air pump is used to pump carbon dioxide into the pipe, so that the carbon dioxide enters the ring-shaped straight cylinder from the small opening in the pipe.

　　 However, the production of high-purity carbon dioxide is more troublesome, and it is also dangerous. Therefore, Chen Xin directly uses ordinary air here, allowing the chassis to directly absorb the surrounding air.

　　 As for the fill light, it is installed on the top cover, because the circular straight tube is placed upright, the dead algae will be deposited to the bottom, relatively speaking, the light transmission will not be so good.

　　 There are various tools on the workbench and the upgraded oxygen generator in the bedroom as a reference. The oxygen generator for Mo Qingyan was made quickly.

　　 After all, the structure itself is very simple, and the technology is relatively uncomplicated. With the help of the system, Chen Xin quickly completed everything and assembled it together.

Compared with the upgraded oxygen generator in the bedroom, the one that Chen Xin made by hand looks rougher, and there is not much difference other than that. It is already used for Mo Qingyan. enough.

　　 So after finishing the oxygen concentrator, Chen Xin did not spend survival points to upgrade the oxygen concentrator, so he planned to hand it over to Mo Qingyan.

　　 Putting the finished oxygen generator aside, Chen Xin checked the time and planned to have lunch first, take a break, and upgrade the door in the afternoon.

　　 Although it was just to confirm the upgrade, Chen Xin didn't plan to finish it eagerly.

　　 There is not much to do every day in the refuge itself. Chen Xin doesn't want to finish everything at once, and then become idle to play games.

　　 Of course, Chen Xin is not really nothing. The daily maintenance of the planting greenhouse cannot be saved.

　　 It’s just that as the crop enters the growing period, he only needs to ensure the water supply and sunlight to maintain the operation of the planting greenhouse.

　　 As for the prevention and control of various diseases and insect pests that are common in general greenhouses or greenhouses, Chen Xin is naturally also very concerned.

　　 But I don’t know if the seeds I bought are good, or if the system-upgraded planting greenhouse has black technology. At least so far, Chen Xin has not encountered any crop diseases and insect pests, and all the crops are growing healthy.

The upland rice he planted has now entered the long ear stage~www.ltnovel.com~ From the young ears to heading development, this process will last about 30 days. According to the growth cycle, these upland rice should enter the fruiting period in a few days. Period, began to head.

　　 I have to say that Chen Xin had never planted fields before. After he really started to grow dry rice, he realized that the so-called dry rice is planted twice a year because the environment and climate do not allow it.

　　 If it is in a planting greenhouse, let alone two seasons a year, he can plant three seasons a year.

In this way, Chen Xin found that after he expanded the planting greenhouse to the current 200 square meters, if he uses half of the land to grow upland rice, he can harvest about 600 catties of rice a year. Although not a lot, it is at least as a staple food. It is enough to maintain Chen Xin's consumption alone.

Even if Chen Xin upgrades his planting greenhouse again, he upgrades the current single-layer hydroponic planting to multi-layer hydroponic planting, all used to grow vegetables, and the land is used to grow upland rice, his output can even afford one or two more. personal.

　　 As for the further upgrade, the fish-vegetable symbiosis cycle system and animal breeding can be created. Simply raise some fish or poultry such as chickens and rabbits, so that more people can survive.

　　 And more importantly, Chen Xin can now exchange vegetables for food from the SWAT team.

　　 Although the food from the shelters that Qin Lan had brought before was really unsatisfactory in terms of taste and texture, at least it was food, something that was edible, and it was still considered good food today.

　　 Speaking of food, after Chen Xin thought about it for a while, he decided to eat the roasted mouse meat with mushrooms that Qin Lan brought at noon today. As for the canned meat from Mo Qingyan, he can keep it and eat slowly.

　　 After all, rat meat is eaten now, but pork is not sure when it will be eaten again.