Five days later.

Zhao Chen's survival point successfully exceeded 2000.

Then.

The 100-square-metre animal breeding room has been added to the new members.

Moreover, Zhao Chen built a hot spring before.

The entire hot spring pool is in a state of mist all the time.

After staying in it for a long time, it is inevitable that I will be a little bored.

As more and more living buildings were built, the sewage and exhaust air in the entire shelter gradually became a little overloaded.

Although distressed survival point.

But it is also extremely important to improve the quality of life.

"The system inquires about the upgrade conditions of the sewage system. "

【Sewage system】

[Upgrade Condition: Survival Point 800]

[Upgrade effect: Primary sewage system, can discharge all sewage in the shelter]

[Upgrade raw material: PVC pipe ......]

[Attributes can be attached, and a certain survival point can be consumed according to the effect.] 】

【Upgrade?】

No doubt.

Since Zhao Chen has already asked, he has this plan.

"Level up!"

White light flashed on the sewage system.

Soon, the raw materials on the ground disappeared.

Looking at the brand-new sewage system, Zhao Chen quickly showed a smile.

Another project is complete.

Now he still has 1558 points of survival.

Since there are still many survival points, Zhao Chen directly rushed to the top.

"Inquire about the exhaust system upgrade conditions. "

【......】353

[Upgrade Condition: Survival Point 800]

......

"Level up!"

As Zhao Chen spoke, another burst of white light flashed in front of him.

His survival point also dropped to 758 in an instant.

But after the exhaust system changed.

It was obvious that the air throughout the Vault was much better than before.

These 800 survival points are totally worth the money.

Really.

On the premise of ensuring safety, it is also necessary to change one's living environment.

I didn't think it before.

But after the upgrade, a comparison.

You know, before, he suffered.

After Zhao Chen did all this, Qiao Qian and Ying Mengyao soon found that the shelter was a little different from before.

It's just that this kind of thing happens all the time.

The two of them had long been accustomed to it, and they didn't ask too much.

After breakfast, Qiao Qian plunged into the training room again.

I didn't go out during this time, and I didn't meet any enemies.

This soldier king is probably in a panic now.

Today's personal training rooms are only the most basic and can only accommodate one person at a time.

Zhao Chen began to ponder whether to upgrade the personal training room again.

Seeing that there are only more than 700 survival points left, (ajch) still wants to use it on the fortifications first.

In the end, he managed to control his impulses.

After all, there are only three people in the shelter now, which is enough.

Judging by the current level of calamity, his steel refuge can fully withstand it.

But there's no guarantee of what will happen next.

So the most important thing for him now is to upgrade the shelter in time.

In this way, no matter what happens in the future, you can respond as soon as possible.

【Adventure Quests Refreshed】

Zhao Chen is struggling with how to improve his survival point.

I heard the news.

The eyes lit up.

It is now known that the best way to improve your survival point is through daily quests, adventure quests, and the elimination of radioactive creatures.

Daily quests get fewer survival points.

Although there are many survival points to be gained by exterminating radiation creatures, it is a process of luck.

No one can guarantee that they will encounter a lone radiation biota when they go out.

Most importantly.

After a wave of manipulation by the big boss behind the scenes last time, the surrounding radiation creatures have almost been cleaned up. (If you read a violent novel, go to Feilu Novel Network!)

The last time Zhao Chen used himself as bait, he got more than 2,000 survival points.

That's only one adventure left.

Zhao Chen immediately opened the adventure mission information.

[Adventure Mission: Find Core Upgrade Materials.] 】

[Requirements: If you want to upgrade the Steel Vault, you must have enough core upgrade materials, please find them on your own.] 】

[Reward: Get 30 survival points for every ton you find!Submachine gun crafting blueprint!]

Zhao Chen couldn't help frowning when he saw this adventurous mission.

This time the adventure quest looks good.

After all, he wanted to upgrade the steel shelter, and he had to have enough tungsten steel.

Now it is a good thing that there is both tungsten steel and can earn a survival point.

But the tungsten steel from the steel factory has basically been traded by him.

If you want to look for it again, you have to go somewhere else.

If you leave the steel shelter and appear in the outside world, the natural crisis will follow accordingly.

After all, in addition to the glacial weather outside, waves of radiation life are also a problem.

But.

Zhao Chen quickly gritted his teeth.

Wealth and danger are sought!

In addition to finding tungsten steel can increase survival points, destroying radioactive creatures can also increase survival points.

Wouldn't that be a two-pronged approach?

In this way, the survival point will definitely grow quickly.

Even if you can't upgrade the Vault level for a while.

But I can strengthen the external fortifications and the strike fortifications again.

It is undoubtedly an improvement in the safety of the entire shelter.

Be sure to have everything ready before you go out, though.

Armed RVs, submachine guns, double-barreled shotguns are essential.

Food must be featboarded.

Even if you are outside, you can't treat yourself badly.

Infrastructure No. 1 and Infrastructure No. 2 should also be brought.

If you find tungsten steel, you have to rely on the two of them to carry it.

Naturally, drones too.

You can keep track of your surroundings at all times.

Something is not right and immediately retreat.

Of course, before that, we must have an understanding of where tungsten steel may appear.

You can avoid taking a lot of wrongful paths.

Zhao Chen directly opened the exchange and found the steel manufacturer.

Whisper in the dream: "Ask you something." "

Almost at the same time that Zhao Chen had just sent the news, the steel manufacturer had already replied.

At this time, he was holding his mobile phone with excitement on his face.

It's rare for the big guy to take the initiative to find him once.

Still need his help.

It must be done beautifully.

Definitely leave a strong mark in the heart of the big guy.

Let him have good things in the future and think of him at the first time.

Iron and steel manufacturer: "Big man, you can say anything, as long as I can do it!"

Through the screen, it seems that you can see the excitement of the steel factory.

Zhao Chen was helpless and hurriedly replied.

The whisper in the dream: "It's not a big deal, it's just to ask you, do you know where there is tungsten steel in Hangcheng." "

Steel manufacturer: "Wait, big guy, I'll check." "

It didn't take long, and the reply from the steel mill came quickly.

There are not many manufacturers of tungsten steel in Hangzhou.

Steel mills are already the largest.

As for the others, they have been lost one after another.

In the end, the steel factory could only report a few addresses to Zhao Chen.

Iron and steel manufacturer: "Big man, I'm really sorry, you finally looked for me once, but I haven't done it yet." "

The whisper in the dream: "It's okay, feel free to contact me when there is news about this in the future, and I will consider you first if there is a transaction." "

When the steel manufacturers saw the news, their eyes lit up.

He does so much, not for this.

The exam is over in the past few days!

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