Upgrade! Stone Shelter!

Pulling the crafting page to the bottom, Su Mo clicked with his mind, and the list of materials popped up.

[Hunting Compound Crossbow: Wood 0/8, Iron Block 0/8, Copper Block 0/4, Nylon 0/2, Composite Nylon 0/1]
[Matching Arrows 5: Wood 0/2, Iron Block 0/1]

After unlocking the blueprint for the compound crossbow, the blueprint for the matching arrows came with it, so Su Mo didn't need to acquire it again.

"The iron block is easy to handle."

"Now I'm just short of nylon and composite nylon, and copper blocks."

"I wonder if anyone has nylon on hand. Copper blocks should be relatively easier to get."

While thinking, he called Oreo back, and Su Mo walked back to the Shelter.

When exploring the game panel, it's easy to overlook the surrounding environment, so Su Mo usually browses the trading market inside the Shelter.

Before, when checking out the items for trade, Su Mo had seen many strange little things.

Searching now, he indeed found traces of copper blocks on the trading panel.

Currently, the price of a copper block is marked at 100ml of water, while nylon is nowhere to be found.

"These people are asking for too high a price."

Su Mo browsed around and suddenly discovered that there were only two people selling copper blocks. The newly listed copper blocks were taken away by these two before he could buy them.

These players, similar to game merchants, hoard resources that are still scarce and raise prices on the spot.

"It's more cost-effective to collect them myself and exchange them for materials with Psionic Water."

Su Mo pondered for a moment and posted several sets of trading methods.

[Seller: Su Mo]
[Trade Item: 50ml Psionic Water]
[Demand: 1 Copper Block]
[Stock: 200ml]
[Trade Item: 100ml Psionic Water]
[Demand: Nylon *2]
[Stock: 200ml]
[Trade Item: 200ml Psionic Water]
[Demand: Composite Nylon]
[Stock: 200ml Psionic Water]

The Acid Rain that is coming tomorrow, in the eyes of most people, is not a disaster, but a "supply".

Since morning, the purchasing power of water has been declining.

Not only for exchanging materials, but even for exchanging for the same amount of food, it's greatly discounted.

But fortunately, the purchasing power of Psionic Water remains strong.

The materials acquired can just make up the material requirements for manufacturing the Hunting Compound Crossbow.

The copper block exchange was completed in less than half a minute after it was posted, with four units being traded.

"Big shot, where did you dig up the Psionic Water? Don't worry, we'll split the profits 19 if we dig it up."

"Su God, I still have copper blocks, please take mine, I haven't had water for a day."

"Sir, I have nylon, but the price isn't enough, it needs to be raised!"

"..."

Messages poured in one after another.

This was the Nth time Su Mo had put Psionic Water up for sale, so almost everyone guessed that he had a fixed gold mine, with a continuous source of water.

Most people who bought Psionic Water didn't just use it for quenching their thirst.

They are mostly stored as reserve strategic medical supplies. In case of injuries, Psionic Water might be able to save a life.

On the World Channel and Area Channel, a large group of people started chatting, discussing the two types of nylon Su Mo needed.

After the previous probing, Su Mo learned that nylon was not a scarce commodity, but some people were unwilling to sell, hoping for a price increase.

Seeing the increasing number of private messages, Su Mo set up keywords for the Hunting Compound Crossbow nylon and ignored them.

There are no immediate fatal threats, so there is no need for the Hunting Compound Crossbow for emergency use. Perhaps some people will sell it at a lower price in the evening.

After sorting by price, Su Mo received another 50 units of stone, making up for the loss of repairing the aqueduct.

After slowly taking out all the construction resources and piling them up in the Shelter, Su Mo felt excited.

Living in a Wooden Shelter is okay in the early stages, but as time goes by, the wood will inevitably suffer rigidity loss one day, which is really not very safe.

Now that he has enough conditions to upgrade to a Stone Shelter, Su Mo didn't hesitate and started upgrading manually.

The first thing to upgrade was the Shelter Door, which is also the first line of defense in the wasteland.

[Shelter Door]

Effect: Slightly anti-theft, slightly anti-radiation

Upgrade direction 1: Increase the thickness of the Wooden Door, increase the solid properties of the wood, slightly fireproof and waterproof (10)

Upgrade direction 2: Change the material, upgrade the Wooden Door to a Stone Door, greatly increase durability and other properties (5)

Evaluation: You don't want to live in the apocalypse with a Wooden Door, do you?

Clicking on upgrade direction two, the stone on the ground was scanned by a green light, and ten units of stone were melted, turning into stone water attached to the Wooden Door.

After a short wait, the original Wooden Door disappeared, replaced by a simple Stone Door.

Pushing open the stone bolt and pulling the wooden Stone Door handle, Su Mo was pleasantly surprised again after slowly pushing open the Stone Door.

The thickness of the Stone Door was a full 20cm. Such thickness would be difficult to penetrate even with bullets. As long as he closed the door inside, no matter how many people were outside, they would not be able to break in.

Of course, the premise is that these people don't have explosives. The workmanship outside the Stone Door is very rough. The system also paid attention to concealment during the upgrade. Although it still looks out of place in the wilderness, at least ordinary creatures will only regard it as a rough rock.

After closing the door and returning to the base, Su Mo began to upgrade one by one.

With each scan of the green light, the original wooden floor would undergo earth-shaking changes, turning into a light gray stone floor.

After upgrading the foundation, Su Mo began to upgrade the load-bearing structure and ceiling again.

As the last piece of wood changed color, the Shelter was completely renewed.

First of all, the internal environment.

There was no longer a damp feeling, and the dirt on the Wooden Boards from days of activity also disappeared.

At this time, the ground was clean and uniform, entirely composed of light gray. Because it was polished extremely smooth and flat, at first glance, it looked a bit like gray tiles were pasted on it.

The original potholes were also filled under the upgrade of the system.

The color of the stones on the walls was a slightly simple dark brown, with occasional stone patterns, making the Shelter less dull.

The ceiling above the head adopted the same color as the walls, making it more integrated.

"Not bad."

Su Mo looked around inside and out, and then opened the Shelter overview in the game panel.

[Personal Shelter]

Description: A Shelter made entirely of stone, extremely strong, with good safety, and has unique effects in isolating moisture and keeping warm.

Space: 100㎡ (height 4.2m)

Integrity: 100% Facilities: Iron Stove, bed, Large Vegetable Culture Medium, Youneng Well Water Extractor, dining table. Introduction: People have to pay for their youth, but you have to build a house for your youth.

"This is the greatness of human civilization!"

Su Mo sighed with admiration. The biggest advantage of a Shelter made entirely of stone is not anything else, but two words - safety!

The safety that everyone in the apocalypse is desperately pursuing has now been built by Su Mo in just four days.

Walking around, touching here and looking there, looking at the brand-new Shelter, Su Mo couldn't help but feel happy.

"It's a shame, if only we had electricity. Living in this stone house isn't as comfortable as reinforced concrete. I'd install a bathroom when the time comes, no, a bathtub. Watch a movie, drink some red wine..."

Looking at the ceiling, Su Mo sat on the steps, lost in thought.

Since coming to this world, every time the environment inside the Shelter got closer to Earth, Su Mo's mood became more and more complicated.

From nothing to something, from the Stone Age to the Electrical Age, humanity took more than five thousand years.

And a person's lifespan is only a few decades at most. In this precarious doomsday, will there really be a day when electricity is restored?

Clenching his fist, Su Mo threw the gloom in his heart to the back of his mind.

Now is not the time to sigh. He hasn't even walked three kilometers into the nearby wilderness, let alone the future!

After taking stock of his supplies, the reserve of Psionic Water, not counting the 400ml listed on the trading market, had returned to about 2.5L.

Leaving 1L of water as a backup, Su Mo began the last wave of shopping before the disaster.

(ps: Is anyone reading? It's so quiet!)

New week, please give some favorites, recommendations, and rewards to boost the rankings, thank you readers.