Yanguo re-cleared all the bomb shelters dug that year, and carried out repairs and maintenance in the shortest possible time, and upgraded and expanded them in the following time to ensure that the evacuees who hid in them had a better chance of surviving.

At the same time, the underground rail transit system of major cities is also being rapidly transformed, with backup lines being opened, subway stations being reconstructed and expanded, and underground transportation networks being connected......

A series of work is in full swing, and under the condition that the state has implemented a series of strong controls such as curfews, although the news of the meteorite impact on the blue star has spread, the overall social situation is quite stable.

At least Chen Xin's refuge income was excavated smoothly, and because he saw the opportunity early, he was able to store enough emergency food for him to eat alone for at least two years.

However, he was able to store less drinking water, and even though he designed a large water tank and sewage treatment cycle in the shelter, he still felt a huge pressure to survive considering that humans would face a hundred years of extremely cold nights.

But things have come to this point, and he can only do his best to collect shelf-stable bottled drinking water, and save a little more.

It's just that at this time, everyone is rushing to buy money, bottled drinking water and emergency food have become the most in-demand things, and all supply channels are already in short supply, and it is very difficult for Chen Xin to even replenish a little more.

Fortunately, Chen Xin had joined a small group formed by a group of outdoor enthusiasts before, and after the news of the meteorite impact spread, the group members in the group used their own resources to save themselves, and many people were ready to dig their own shelters like Chen Xin.

The group members proposed that they could use empty bottles of tap water to reserve, so that Chen Xin was able to reserve a lot of fresh water resources.

Although bottled tap water is certainly not as shelf-stable as bottled purified water, and there are some problems in drinking, even urine has to be drunk under extreme conditions, and even water has to be taken from feces.

Chen Xin's city is located on the shore of Dongting Lake in the middle reaches of the Yangtze River, the population density is not large, and he does not live in the city for some personal reasons, but lives alone in the suburbs of the city.

Under the premise of having the help of construction machinery, it is not difficult to dig an underground shelter that can accommodate and defend against natural disasters, and it is a relatively professional engineering team that undertakes Chen Xin's project, and the shelter is quickly dug in the case of using small excavators, and Chen Xin also transferred all the materials he hoarded into it.

This engineering team is regarded as Chen Xin's old relationship, and the relationship between the foreman and Chen Xin is quite reliable, and Chen Xin is still very satisfied with the quality of the project.

Because of the high temperature and extreme cold caused by the meteorite impact, Chen Xin wanted to dig the shelter very deep, preferably fifty or sixty meters like a subway station.

But this is somewhat unrealistic, and the engineering team can do it, but it is too time-consuming and too large, so Chen Xin's method is to dig a diagonal passage under the mountain near his home, and then dig a large enough shelter on the basis of the passage.

This is also a common practice of digging air-raid shelters in various countries, with the help of mountains as shelters, which can effectively save the amount of construction and provide adequate protection for air-raid shelters.

Chen Xin's shelter is not too big, the total is less than 300 square meters, and the usable area that can be used for living is only thirty or forty square meters, excluding the garage reserved by Chen Xin, the tank used to store fresh water and fuel oil, and other related equipment and materials, as well as a greenhouse for growing food after the disaster.

But for Chen Xin alone, such a large area is more than enough for the possible end of the world.

As for the living conditions, Chen Xin's shelter is not a hole in the land, but a container house is buried after digging a large enough pit, and these containers are specially customized.

In addition to having good thermal insulation performance, a variety of living facilities are also readily available, in addition to allowing Chen Xin to live in a warm and comfortable environment even in high temperature and extreme cold environments.

In fact, this kind of container house is now very mature in technology, and even at the beginning of the year, when the disease spread, the national emergency hospital was built with this kind of container building.

Compared with traditional reinforced concrete, this kind of containerized building can be prefabricated in the factory, and only needs to be installed when transported to the site, which can be said to be very advantageous in terms of construction speed, and it is also good and cheap in price.

However, even so, the entire container house plus the construction cost of the shelter still spent all of Chen Xin's savings.

But after living in this shelter that was finally completed, the sense of security that arose spontaneously made Chen Xin feel that it was worth the money.

After taking a few photos of the shelter that had been built and sending it to a small survival group between himself and his friends, Chen Xin immediately won a look of envy, before the disaster came, being able to prepare such a well-equipped shelter was enough to greatly enhance Chen Xin's chances of survival when the end came.

There are even girls in the group who send messages privately to ask Chen Xin if he lacks a girlfriend, as long as Chen Xin nods and asks her to move in, and even if Chen Xin feels that one is not enough, she can bring another girlfriend over.

Looking at the two beautiful girls in the photos sent by the girl, Chen Xin can be said to have no intersection, and he really almost nodded in agreement.

However, Chen Xin still held back in the end, after all, although he had good conditions here, the materials he hoarded were a little tight for him to use alone, and although it was not impossible for two more girls to come, it would undoubtedly greatly reduce his chances of survival.

After all, according to his estimates, after the catastrophe, animals and plants will die on a large scale, and the only sources of food are likely to be rats, cockroaches, and mushrooms, which will not disappear even if humans become extinct.

As for planting greenhouses, it can indeed provide some food, but maintaining greenhouses requires a lot of resources, and Chen Xin is not sure how long the resources he has stored can support the operation of the greenhouse.

Therefore, reducing consumption as much as possible and supporting post-disaster reconstruction after the environment has stabilized is the key to his ability to survive this disaster.

However, despite all possible preparations, Chen Xin still hopes that all his preparations will not be used, and sincerely hopes that all countries can resolve this crisis.

After all, who wants to hide in a hole in the ground and nibble on mushrooms?