What other people's lives are like doesn't have much to do with Chen Xin, what he needs to worry about now is his own life.

The original plan to upgrade the shelter was also affected by this incident, and Chen Xin's original plan to collect supplies through Li Yulong's trading market was temporarily shattered when the trading market and plantation were suspended, and the special police team's material trading was no longer able to do so in the short term.

After all, the project of the trading market has been suspended, and the SWAT team has to devote the police force to the investigation of this incident, and the material transaction with Chen Xin can only be maintained in the exchange of basic living materials.

As a result, Chen Xin's original shelter upgrade plan could not be continued in the short term.

Although after the ground source heat pump unit on the SWAT team's side was running smoothly, the survival points had been settled, so that Chen Xin's survival point reserves on hand were close to five figures, and the survival points obtained every day also exceeded one hundred, as long as he accumulated for a period of time, it was enough to use survival points to upgrade the shelter, but Chen Xin still didn't want to upgrade in this way.

On the one hand, the overhead is too high, and on the other hand, a single upgrade solution cannot meet the needs of the old one.

When the survival points on the SWAT team's side were settled, Chen Xin also found that according to the rules set by the system, the upper limit of survival points he could obtain at a time in a single shelter or settlement was 5,000 points, and the upper limit of daily survival points obtained at one time was 50 points.

This obviously limited Chen Xin's idea of quickly obtaining a large number of survival points in a short period of time, and then using them to directly upgrade the shelter.

It may be possible to choose an upgrade plan to upgrade first, and then make subsequent adjustments, but if possible, Chen Xin still hopes to be able to upgrade the entire shelter in one go.

Therefore, because of the shortage of materials, Chen Xin could only temporarily shelve his shelter upgrade plan and focus on other things.

For example, the upgrading of your own car.

In the past few days, he has been frequently in and out of the city because he has to deliver food to Qin Lan, and under the increase in demand for cars, Chen Xin also has more requirements for his cars, so upgrading the vehicles has become his current priority.

However, this was not a big deal, after all, the vehicle modification was at the top of his list of priorities, but now it was just a matter of moving the entire Vault upgrade back to make it the highest priority.

Previously, Chen Xin had upgraded the wheels in order to go out, improving the ability of the tires to cope with snow roads.

But this is only the most basic upgrade, and it does not make a radical change in the performance of the vehicle.

Although it is enough in the current situation, Chen Xin wants more.

Previously, the tyres were modified to make the regular snow tires more grippy, and the chassis height and suspension were adjusted, but if you want to continue to improve performance and ride comfort, you have to upgrade a lot more.

For example, the structure of the chassis.

Now Chen Xin's car is still a wheeled chassis, which has the advantages of low fuel consumption, light weight and good maneuverability, but the traffic capacity is worse than that of the tracked chassis.

Although the tracked chassis is more bulky and has higher fuel consumption, it has a stronger carrying capacity and can tow heavier bodies.

And the driving force of the crawler chassis is larger, and the grounding specific pressure is also smaller, so the off-road performance and stability are good, the climbing ability is large, and it is more suitable for the passage in the complex road conditions of the ups and downs in the wild.

Especially when driving on snow, the wheeled chassis is prone to tire sinking into the snow, while the track does not have such a problem, and the track with a larger ground contact area can make the vehicle ride on the snow surface fairly smoothly without causing the wheels to get stuck in the snow.

Therefore, for Chen Xin, he hopes to replace the chassis of the SUV in front of him with a crawler type and upgrade it from an SUV to an ATV all-terrain vehicle.

However, the crawler chassis has many benefits, but the problem of energy consumption is a key point that Chen Xin can not avoid, after all, there is no high-horsepower engine with the tracked chassis to move forward, and high-horsepower also means high fuel consumption.

"So going around and around, you still have to get on nuclear power!" Chen Xin looked at the design sketches he had drawn on the computer, and felt that he still had to give his car nuclear power.

Because he calculated, only nuclear power can meet his needs, after all, if he really changes to a tracked chassis, the consumption of fuel is also very amazing.

As for nuclear power, this is not a high-tech, although many people talk about nuclear discoloration, directly associate nuclear with radiation, and always feel that this thing is very dangerous, but I have to say that in fact, with the current level of science and technology of human beings, nuclear energy can already be used cleanly and efficiently.

The continuity and stability of this thing is also very reliable, and the nuclear-powered lighthouses built in the pre-Sovia era are still in operation today, but the equipment has been undermaintained for a long time and has been aging to cause radiation leaks.

Therefore, in history, the group of Mao Zi who were undecided to use nuclear bombs not only created a four-track monster like a nuclear-powered tank, but also used nuclear bombs to repair reservoirs and block oil field fires.

And it is not complicated to put nuclear power on the vehicle, only a radioisotope thermoelectric generator is required.

The principle of this kind of thing is to use the rays with heat energy released by radioactive materials during the decay process to convert heat energy into electrical energy in thermoelectric elements.

The radioactive material is very stable in the decay process, and the energy released is not affected by the temperature, chemical reaction, pressure and electromagnetic field in the external environment.

Another feature is the long metamorphosis time, which determines the long-term use of nuclear batteries.

Of course, Chen Xin doesn't have a nuclear battery in his hands, and he doesn't have a place to buy this thing, but having a system means that he can upgrade it himself.

To make a nuclear battery, a long half-life isotope would be made into a charge, then wrapped in a thermoelectric element and, to be safe, coated with a layer of lead to prevent radiation leakage.

But the system upgrade is not so troublesome, Chen Xin only needs to prepare a long half-life isotope material, thermoelectric elements and lead, to be able to upgrade the car battery on his SUV to a nuclear battery.

Of course, without these things, there is nothing wrong with leveling up directly with survival points.

After carefully considering the pros and cons, Chen Xin decided to upgrade a nuclear battery directly with the survival point first, and then consider the matter of getting isotope materials.

After all, isotopes are controlled materials in the Yan Country, and they are not as easy to get as thermoelectric components and lead, so he will definitely not be able to get them directly.

But if there is a nuclear battery as a sample, saying that he can make a nuclear battery, Chen Xin feels that there is still some hope to get some isotope materials.

Thinking of this, Chen Xin picked up the wrench and screwdriver from the workbench, and decided to remove the car battery on his car first and upgrade it to a nuclear battery.

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