Doomsday Bunker Upgrade

"Cough cough cough!" Chen Xin was woken up by choking.

Today is the third day that Chen Xin has entered the shelter. After two days of adaptation and adjustment, Chen Xin feels that he has adapted to the life in the shelter.

It's just that today, for some unknown reason, the entire shelter was filled with the choking smell of smoke, which made Chen Xin wake up directly from his sleep.

While coughing and covering his mouth and nose, Chen Xin got up from the bed and turned on the light in the room.

He put on his clothes shakily, but still felt dizzy, and even his breathing was a little difficult.

Chen Xin knew that it was not because he hadn't woken up yet, but because there was harmful gas in the choking smoke in the air. He inhaled a lot of smoke in his sleep, which affected his breathing.

If he hadn't been choked up and continued to sleep like this, he would most likely have died from hypoxia or poisoning by harmful gases in his sleep.

Chen Xin, who had reacted, hurriedly found a gas mask and an oxygen bottle from the cabinet beside him. After taking a few breaths of oxygen for himself, he put on the gas mask.

After taking a few breaths of oxygen, Chen Xin finally calmed down, and he had time to think about what happened.

There should be no fire in the shelter, because he has never used any open flames at all, and he has even used an induction cooker to boil water for the past two days.

But at this moment, Chen Xin didn't think much, ran to the garage and picked up the small fire extinguisher in the trunk of the car, and then he checked various places of the shelter.

However, what made Chen Xin very strange was that the shelter was not on fire, nor was there any smoke.

Where did the choking smoke in the air come from? These choking gases are obviously the smell that comes after something is burned. To say that nothing has burned, Chen Xin absolutely does not believe it.

However, when Chen Xin started to check again, he finally found that the smoke came in from the ventilation opening of the shelter, and the smell of smoke entered the shelter from the outside.

This discovery made Chen Xin react, it was a fire outside!

In two days, has the fire caused by the meteorite impact finally burned here?

But this discovery made Chen Xin feel extremely helpless, because even if he knew the reason, he couldn't solve the problem.

It was a fire that spread to the whole world, and most of the vegetation would be ignited. Although Chen Xin did not go out, he believed that the mountain where his refuge was located should have already burned, otherwise he would not let him Refuge with such a strong smell of smoke.

Be aware that the ventilation system of the shelter is specially designed to filter smoke and toxic and harmful gases under normal circumstances.

But the current situation... It is clear that the smoke concentration outside has exceeded the limit of the ventilation system to filter and withstand.

Chen Xin suddenly felt helpless and hopeless, is he going to be smoked to death like this?

Although he has prepared gas masks and oxygen cylinders, there is a limit to how long these things can be used.

In such an environment where the smoke is getting thicker and stronger, even if the respirators bought by Chen Xin are of good quality, they can only last for a few hours at most. two hours.

Although according to Chen Xin's estimation, the mountain fire outside will not last for a long time and will be extinguished due to the drop in temperature caused by the sky being obscured by dust clouds, but this time will still last for several days or even more than a week.

Originally, Chen Xin thought that his shelter ventilation system was enough to ensure his survival for such a long time, but now reality has given him a ruthless slap.

The ventilation system that was considered to be able to withstand the attack obviously did not resist the attack of the wildfire. If Chen Xin can't come up with a solution, after the gas mask and oxygen cylinder fail, he is likely to be like those who were smoked to death in the fire. Like people, he was smoked to death in this shelter.

escape? This is obviously not possible.

The smoke has been smoked into the shelter, and it is conceivable that the outside is surrounded by wildfires. Even if Chen Xin opens the door of the shelter and runs out, it will only change from bacon to roast duck on the stove.

And even if he can run out, where can he run to?

This fire is not burning on his mountain, but a super fire all over the world.

At this moment, more than 90% of the vegetation on the entire Blue Star has been ignited by the heat released by the meteorite impact. Flames are burning everywhere on the surface of the Blue Star, and there is nowhere to escape.

There may be no flames at sea, but how does Chen Xin run from the inland to the coast?

Now all the transportation systems have been shut down due to the impact of the meteorite, and the country may still have secret routes, but how could this kind of thing be open to an ordinary person like Chen Xin?

And to be able to use this kind of secret route, Chen Xin also ran a hammer and stayed in the country's secret bunker.

As for official sanctuaries, that is indeed an option.

It's just that there is a core issue here, that is, how should Chen Xin get the closed official shelter to open the door for him under such a fire.

You must know that even Chen Xin’s own shelter door is a solid metal explosion-proof door with a thickness of 12 cm. Let alone knocking with your hand, you may smash it outside with a hammer, and you may not hear it inside, not to mention that for safety, Chen There are also two new doors.

It is conceivable what the gate of the official sanctuary should be like.

So Chen Xin hadn't considered the option of escaping from the very beginning.

If you just don't escape, what should you do to survive?

The ventilation system has now reached its limit. Unless you change to a new and stronger ventilation system, you will end up being smoked to death in this self-built shelter!

and many more! Chen Xin suddenly shuddered, thinking of a key point that he had overlooked.

He could indeed change to a stronger ventilation system because he has it!

Thinking of the system, Chen Xin hurriedly called out the system interface, and then aimed his gaze at the ventilation duct of his shelter.

Sure enough, the ventilation ducts in sight lit up, and an upgrade plan was given.

"Natural ventilation system"

"Upgrade plan 1: upgrade the filter material, improve the air filtration level, increase the forced mechanical ventilation function, and upgrade the required survival points by 100"

"Upgrade plan two: upgrade the pipe material, improve the thermal insulation level, increase the temperature adjustment function, and upgrade the required survival point 100"

Without even thinking about it, Chen Xin chose the first upgrade plan directly.

With his confirmation, the grid-like light appeared again within the realization as when the system was activated for the first time, but this time the light that appeared only covered the ventilation ducts.

Soon, the brilliance dissipated, and the ventilation ducts of the Chenxin Refuge had been completely renewed, and the upgrade was completed.