However, even if the ventilation duct upgrade is completed, the air in the shelter is still full of smoke and various harmful gases, so after Chen Xin completed the upgrade of the ventilation duct in the system, he hurriedly wanted to open the forced ventilation function added after the upgrade to ventilate the air in the shelter.

It's just that he found the switch for forced ventilation and pressed it twice but nothing happened.

Chen Xin was stunned for a moment, and hurriedly checked it around, only then did he realize that the function of forced ventilation needs to be electrified.

Fortunately, the ventilation system of the upgraded system has been directly connected to the power distribution room, and Chen Xin needs to be wiring or plugging in, he only needs to turn on the line control switch from the power distribution room to start forced ventilation.

After tossing for a long time, he finally heard the sound of the fan running and the wind brought by the high-speed flow of air from the ventilation duct, and Chen Xin was relieved.

However, the power of the battery is limited after all, Chen Xin was worried about the lack of power and filled the generator with oil, and after starting the generator to ensure power supply, the whole person collapsed on the sofa in the living room.

After smoking for more than half an hour, Chen Xin felt that it was almost over, took off the gas mask on his face and smelled it, and felt that he couldn't smell the smoke anymore, so he went to turn off the forced ventilation.

Although the function of forced ventilation saved Chen Xin's life this time, this function does not need to be turned on all the time, and it is not only very noisy when it is turned on, but also consumes electricity.

If it is not necessary, it is more resource-efficient to close it.

With the forced ventilation turned off, Chen Xin returned to the sofa in the living room, and at this time he let go of the worries and panics caused by what had just happened, and his mind began to work to think about the problem.

This incident sounded the alarm for Chen Xin, his seemingly safe shelter actually had loopholes, if he didn't have a system to upgrade the ventilation system this time, then he would probably have been suffocated.

Even if he didn't wake up in time, then he would probably have suffocated in his sleep.

Therefore, if Chen Xin wants to live well, he must improve his vigilance, and at the same time, he must make good use of the system to upgrade the shelter as much as possible, so that the shelter can better protect him and provide him with survival guarantees.

This incident also confirmed that if Chen Xin didn't have to, all survival points would be invested in upgrading the shelter instead of other dispensable item upgrades, and he would have to reserve a survival point at any time in case of emergency.

It's like this time, if Chen Xinxing doesn't happen to have enough survival points, then even if the system can upgrade the ventilation system, he doesn't have enough survival points to do this, then in the end, he may still suffocate because of the excessive harmful gases in the air and the insufficient oxygen content.

Chen Xin is now able to earn 10 survival points per day, and the reason why he was able to save up 100 survival points in two days that could be used to upgrade the ventilation system was because he obtained an achievement when the system first settled survival points.

"Owning a Vault rewards 100 survival points"

Through this achievement, Chen Xin also understood that this system also has a way to obtain survival points through achievements.

However, Chen Xin is still confused about what things can be achieved, and he has not studied them in depth, so at present, he mainly relies on the 10 points settled every day to accumulate survival points.

Of course, with the upgrading of the shelter, Chen Xin's living conditions are getting better and better, and there will be more and more survival points that can be settled every day.

Therefore, Chen Xin is still confident in his future, even if the world falls into the end, as long as he works hard to live, with the help of the system, he will definitely live better and better.

With this belief, Chen Xin cheered up again.

Although he had choked on the smell of smoke and harmful gases before, the effects of harmful gases on his body were gradually subsiding with oxygen provided by an oxygen cylinder, and his mind was much clearer.

Chen Xin, who had recovered, thought seriously, the condition for the system to increase the survival points settled every day was to improve his living conditions, so what things in the shelter could be regarded as improving his living conditions?

Chen Xin took out the notebook he was carrying, which recorded some things that Chen Xin had summarized two days ago.

He flipped through the records on it, looked at the items he had listed on it, thought about it, took out the pen in his notebook, turned to a clean page, and relisted a new table on it, and the first thing he wrote down was medical treatment.

This incident reminded Chen Xin that the first priority of survival is to ensure his own survival, so perfect medical facilities can undoubtedly greatly improve his survival chances.

Not to mention anything else, in the current environment of lack of medical treatment, it is impossible for Chen Xin to leave the shelter to see a doctor even if he has any illness, and he only has some commonly used medicines in reserve, and it is good to say that he has a cold and fever, in case it is an uncommon disease, then he can really close his eyes and wait for death, or simply give himself a knife.

Therefore, a complete set of medical facilities is what Chen Xin inevitably needs, and it is best to have a special medical room or simply a medical cabin that can be cured if his head is blown up in science fiction works.

Fortunately, there is a system, Chen Xin believes that this is not difficult to complete, and all that is needed is nothing more than a survival point.

But after thinking about it carefully, Chen Xin added food in front of the medical article.

Eating is the first rigid need that happens to everyone every day, and no one dares to say that they don't need to eat.

This is the same for Chen Xin, who also needs to eat.

Although he had enough food to store in the shelter, it would eventually run out, so he opened a planting greenhouse, which he had spent the first two days sorting out and sowing the first seeds.

Maybe it's time for you to upgrade your greenhouse next?

Chen Xin listed this as the first option for the next upgrade, but it was not the first option for him to upgrade the shelter.

Because before upgrading the planting greenhouse, Chen Xin had to think about how to keep the greenhouse running.

If you want to upgrade the greenhouse, he must first consider upgrading the power system to ensure the power required for the operation of the greenhouse.

However, thinking of the greenhouse, Chen Xin still decided to go to the greenhouse to have a look, and he didn't know if the seeds he had sown before had sprouted.

Chen Xin is very concerned about this, after all, it is related to whether he can eat fresh vegetables and whether he can still have something to eat after eating the reserved food.