Doomsday Bunker Upgrade

The list brought by Qin Lan contained a lot of materials, but these materials needed to be exchanged by Chen Xin with the vegetables produced in his shelter. The list also listed the exchange ratio that the SWAT team deems appropriate after discussion.

Of course, Chen Xin has no objection to the material exchange, which is also very beneficial to him, but he has different opinions on the proportion of material exchange.

"One hundred catties of fresh vegetables for five bags of cement? This ratio is acceptable." Chen Xin looked at the exchange ratio marked on the list and checked them one by one: "But the steel bars are a bit exaggerated? Replace a steel bar?"

Reinforcing steel is extremely useful to Chen Xin. If nothing else, reinforced concrete must be used to reinforce the gate of the shelter.

"What we provide is standard φ12X12 steel bars, and Axin, you know that there is no steel factory in this city, all of which rely on railway input, and the price is understandable." Qin Lan explained to Chen Xin.

Although the two used to be boyfriend and girlfriend, they obviously did not care about their past feelings when they were bargaining, and they were comparing each other with each other.

"But only 20 catties of vegetables can be exchanged for one steel bar. This price is still outrageous. I think 10 catties is an acceptable price." Chen Xin opened his mouth and cut the exchange ratio in half, but his eyes turned to Qin Lan. Waiting for her to bargain.

Sure enough, Qin Lan shook his head and directly refused: "Ten catties is too little, at most eighteen catties."

However, Chen Xin refused to give in an inch, and kept repeating: "Ten catties, or I'll go find someone else to change it."

"It's impossible. Even if you put it before the disaster, you can't exchange ten pounds of cabbage for a steel bar." Qin Lan shook his head vigorously, but he still made a compromise: "Fifteen pounds, it can't be any less. "

Hearing Qin Lan's words, Chen Xin laughed and said to her, "One step back, 12 pounds, first get me 50 steel bars, which is urgently needed."

"Urgently needed? Ah Xin, what are you doing? Do you need so much steel?" Qin Lan suddenly became curious when he heard that Chen Xin was in urgent need.

Chen Xin said directly: "It's been three months since the end of the world, and the temperature is almost close to freezing point. Before it freezes, I plan to reinforce the gate of the shelter. So in addition to steel, we need cement, sand, and steel. , I can accept the exchange ratio of these building materials, let’s ship them together as soon as possible.”

Hearing that Chen Xin said that it was to reinforce the gate of the shelter, Qin Lan nodded clearly and agreed very happily.

Now the official shelters are also undergoing large-scale expansion work. All shelters have been allocated a large amount of construction materials. The amount of materials that Chen Xin wants is not large. able to meet his needs.

After negotiating the demand for construction materials, Chen Xin proposed another demand that was not on the list: "Alan, can you get me some glass? It would be better to have an aquarium of this shape, plus a vacuum pump."

"You can get it, but Ah Xin, why do you want these things?" Qin Lan asked strangely.

Chen Xin smiled and explained: "The aquarium can be transformed into the suggested algae oxygen generator. Living in an underground shelter will definitely have oxygen problems. I need one for myself, and Long Niang also needs one. I can also help her make one. You can exchange all the good wine she has there, and when it’s cold, you can drink to keep warm.”

"You're not a Maozi, why are you drinking to keep warm!" Although Qin Lan complained like this, he still agreed to Chen Xin's request and wrote down what Chen Xin wanted in a small notebook.

The two checked the exchange ratio of various materials on the list again, as well as the other materials added by Chen Xin, and then the bargaining between the two ended.

After the bargaining ended, the topic between the three became much easier, and Chen Xin also asked about some topics he was interested in.

"Speaking of what is the main food in the shelter now? It's not really mouse, earthworm and mushroom soup, right?" Chen Xin made a joke.

But mice, earthworms and mushrooms are indeed animals and plants suitable for raising in a low temperature and underground dark environment, and they are also the main food sources of the shelter announced by the state before the disaster.

For this question, Ding Ning just shrugged his shoulders and leaned on the sofa in Chen Xin's living room: "I've avoided the difficulty recently, I don't know very well, but what I eat is basically mouse meat stewed with potatoes and mushrooms, but the rice is still there. It's weird to be able to handle it."

"The country has mobilized a lot of rice before the disaster, so it's not surprising to have rice now." Qin Lan knew more about the situation than Ding Ning, so she explained to Chen Xin: "As for mushrooms and potatoes, mushrooms are currently every refuge. All the things that are being grown, the mushroom packs provided by the state have a good yield, and now they can be harvested once a month, if it is not for the lack of planting area, in fact, mushrooms alone can already meet the needs of food.”

Having said this, Qin Lan paused for a while before continuing: "As for potatoes, the country has not promoted planting on a large scale. Although this thing has high yields, it also has a high demand for soil and fertilizer, which is not as stable as mushrooms.

Moreover, it consumes water and electricity, and general shelters do not have the conditions for large-scale planting, so the city has opened up a special underground planting area near the power plant to grow potatoes, and the yield is not too high. "

When Chen Xin heard Qin Lan say this, he nodded understandingly.

In fact, when he built the shelter, the first thing that came to his mind was growing potatoes.

Thanks to the "Mars Rescue" that year, everyone knew that it was possible to live by growing potatoes, so I felt that the end of the world was over. Shouldn't we grow potatoes at this time?

Especially in various time-travel novels, in addition to burning glass to make soap, looking for potatoes has almost become a must-do in time-travel.

It seems that everyone thinks that this is a magical thing. The yield of several thousand catties of crops per mu is undoubtedly a dimensionality reduction blow for traditional agriculture that may not yield one-tenth of the output of potatoes.

Potatoes do have many advantages. First of all, the yield is naturally high. A few thousand catties per mu seems to be a very common yield for potatoes.

Secondly, potatoes are very suitable for growing in alpine regions. Mongolia in the Yan Kingdom and Siberia in Lucia are the main producing areas for growing potatoes. They can still grow healthily in an environment where the temperature is only below 10 degrees, and does not require much water. Irrigation ensures higher yields.

Moreover, potatoes are also rich in nutrients and starch, which can provide a lot of calories and nutrients for the human body in a cold environment, and are indeed an important food for sustaining life.

But potatoes are not perfect.

I found that I made a bug when I was writing guns before. The system should not be able to create materials out of thin air. As a result, I wrote that the protagonist used survival points to directly supplement the materials needed to make bullets. This is a big bug. But it doesn't affect the plot, you can ignore it.

In addition, a fan value speech limit is set, a symbolic 1-point fan value, mainly to filter some trolls. If some readers feel uncomfortable, I'm sorry.