Ding Ning himself has lived in Mo Qingyan's shelter, and has also seen Chen Xin's shelter, and was also captured by his father and returned to the official shelter, and in the past few days since he returned to the police station, he has also seen various other shelters in the city, and he naturally understands the living conditions of these shelters after the end of the world, and there is also a sharp contrast.

If you want to talk about comfort, it is naturally Mo Qingyan's refuge ranking first.

Although the shelter built before the disaster was not designed to deal with this disaster, all living facilities and conditions are very complete, and after many years of careful management by Mo Qingyan, it is naturally comfortable to live in.

However, when Mo Qingyan first built this underground shelter, it was mainly designed for short-term evacuation, and the plan was to spend about one to three years with reserve materials.

Therefore, her refuge can be said to be about equal to nothing in terms of self-sustaining ability.

As for the abundance of supplies, it is still an official refuge.

Although it is the last days of the world, all kinds of materials have become scarce and valuable, but the official evacuation center has the national reserve of materials before the disaster, and there are various measures planned in advance after the disaster, coupled with the overall material allocation and planning of the country, the official evacuation center can indeed be called everything at present.

It's just that the official shelter only thinks about how to keep people alive, and as for whether the shelter is comfortable or not, whether the food is good or not, it has been relegated to a secondary position, and it will only be considered when everyone survives and has the ability to spare.

It's like in the Ice Steam Age, setting up a tent to give Diao people a place to live, and then they will consider slowly upgrading their houses to cope with the cold.

And Chen Xin's refuge is indeed not as comfortable as Mo Qingyan's refuge, and the refuge built by the container house buried in the mountain is not excellent in terms of accommodation conditions.

However, in this kind of apocalypse, it is already a very lucky thing to have such a place to live, and some small shelters in the city do not do a good job in protecting against the cold, although the temperature inside is now not so bad that it cannot be inhabited, but it is necessary to wear cotton clothes.

And the most important thing is that the new shelter has a growing greenhouse, which can produce food.

This is a very important point, because only self-sustaining shelters can sustain survivors in such harsh conditions, which can last for decades or even centuries.

Otherwise, relying on material support alone, how long can the reserve of materials be used without replenishment?

"Ah Xin, what are you relying on to generate electricity here? Gasoline? Is it enough? If it's not enough, I'll ask my dad to exchange supplies with you when I go back, and I'll give you a little more. Ding Ning asked Chen Xin, she had just thought of this question: "Everything is good in your shelter, but it's a pity that energy is a problem, if the oil runs out, you will have a power outage." ”

Thinking of this, Ding Ning also moved his mind, so he said to Chen Xin: "Why don't I go back and tell my dad and get you a diesel generator!" Diesel is more shelf-stable than gasoline, and you can use it for a little longer. ”

"Thank you Xiaoding for your kindness, but I have a plan." Chen Xin did not tell Ding Ning that he planned to make algae oxygen power generation and biogas fuel cells.

These are all to be upgraded with the help of the system later, it is not easy to explain before the upgrade, and there is no need to explain the vagueness of the information state of the system after the upgrade, so Chen Xin is simply too lazy to say.

As for the diesel generator that Ding Ning said he wanted to help him get, although the diesel generator is stronger than the gasoline generator in terms of efficiency and energy consumption, on the one hand, this little improvement is of little significance to Chen Xin, who has a system, and on the other hand, he really has no place to get a diesel oil storage tank.

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Now that Ding Ning has sent the materials, Chen Xin can also start to make Mo Qingyan an algae oxygen generator.

Compared with the one he rubbed by himself before, the oxygen concentrator that Chen Xin made for Mo Qingyan is much richer in terms of materials.

At least he doesn't have to take pipes with mismatched calibers and hard-connect them with tape, and there are pipes and joints of various calibers in the materials sent by Ding Ning.

However, when he made his own oxygen concentrator before, because the materials were simple and he didn't need to make them fine, Chen Xin directly made do with the tools on the weapon workbench.

Now that he wants to make an oxygen concentrator for Mo Qingyan, Chen Xin looked at the glass that Ding Ning got for him, and thought about it for a while, or to make a workbench.

After all, the tools on the weapon bench are no problem, but it is more appropriate to use a more professional workbench for processing glass, connecting pipes and welding circuits.

"Fortunately, Xiao Ding sent a lot of things this time." Standing at the door of the storage room, looking at the various things sent by Ding Ning inside, Chen Xin smiled.

A few boards were taken out of the pantry, nailed together as tables and countertops, and tools were placed on them, and a simple workbench was put together.

When this kind of workbench was renovated in the previous home and the shelter was repaired before, Chen Xin once saw the workers engaged in decoration do it.

Three or two boards put together is a table, but also the processing work of the table, very simple, but better than convenient and practical.

As long as you add tools and equipment, it is a very useful tool table.

After doing it, Chen Xin didn't examine and check it too much, just opened the system and took a look at the upgrade materials, and spent 20 survival points to upgrade the workbench.

The upgraded workbench has changed its appearance, from a structure of just a few wooden planks nailed to a sturdier table, with a green rubber mat on the top, and an extra hanging board behind the countertop, like the weapon workbench.

It's just that unlike the weapon bench that is full of tools, the benchtop is clean, leaving a lot of space.

Looking at the workbench in front of him, Chen Xin sat down on the stool in front of the workbench and tried the feel of the countertop, and the smooth and flat countertop suddenly gave Chen Xin the urge to do something immediately.

However, although the workbench is satisfactory, Chen Xin is doing the workbench in the garage, which undoubtedly makes the not spacious space in the garage itself seem cramped and cramped.

This made Chen Xin scratch his head, it was natural to upgrade the garage to expand the area or simply separate the workbench as a studio, but Chen Xin had to consider the consumption of resources, especially the investment in survival points.

"For now, let's upgrade the gates' defenses first." Chen Xin sat in front of the workbench, took out his notebook, looked at the information recorded on it and muttered to himself: "Maybe you can add a garage and defense room to the gate when you upgrade the gate, move the car and things you use for going out, and prepare for departure at the gate like in the game......"