Lin Yue glanced at the sun that was still hanging high in the sky, and suddenly felt that it was like a world away.

At this moment, the ancient gate of that special secret realm was already pitch black, and there were countless sounds of rustling made by unknown creatures, and it completely entered the night.

But it's still daytime on this side of the other world, and it's only before three o'clock in the afternoon.

This is the so-called "time difference" of the special secret realm, and the previous time on the island was the same, this side is daytime, and there is night.

On the wasteland, the heat is still terrifying, and the scorching heat of the sun has made those plants that were originally growing luxuriant almost sunburned, lifeless.

The sultry air enveloped them all the time, and it was also a stark contrast to the cool secret realm.

"I can understand now that there will be people going to the secret realm to escape the heat before the disaster comes, and it's too uncomfortable outside here."

Lin Yue felt that there might be a large number of people in the secret realm or in the underground ruins now, but there were only a few in this other world.

Perhaps many people come up with a way to avoid disasters should be to rest in the secret realm or underground ruins these days, and then wait until the disaster arrives to be invited out by the system or still nest in the underground ruins.

What else is the way...... There's not much they can do to fight this kind of ghost disaster.

Digging a basement might be a good option, provided they can get out later and it's cool and ventilated enough.

However, this is all predicated on their ability to secure everything on the ground of the evacuation village, including but not limited to the entire shelter of the evacuation village, to preserve enough food and water, and to have the confidence that they will survive the disaster.

What will happen in three days, no one knows.

But Lin Yue is planning well.

Let's get the main refuge to make it pure alloy first!

Under the sun, Lin Yue soon came to the gate of the refuge, he opened the alloy door and walked in, Xiaobai also followed him in, and Lin Yue walked to the warehouse without stopping.

This time, it was very rewarding.

The various resources collected back and forth several times are more than they were collected together in the secret realm before.

He looked up at the asphalt and all sorts of other things in the warehouse, and he piled a large number of axes from the storage space on top of it in another empty corner of the warehouse.

Dozens of pieces of extremely thick glass, large and small, as well as some car parts and other alloys that had been collected before, soon filled the whole pile.

With this storage space of 824 cubic meters, Lin Yue has no taboo to go out of the secret realm, and now he dares to take anything, and he wants to take everything.

So much harvest this time is also his trophy.

"Xiaobai, let's avoid the refuge first, cool and cool, and let's go out again later." Lin Yue said, pushing open the door of the shelter, and Xiao Bai, who had been hiding in the shade and fanning his wings all the time, also got in.

Sitting on the sofa, the little six sons also gathered around, it seems that because of the excessive heat outside, these little Xiaoice lizards are extremely uncomfortable, so they have not gone out.

However, it was quiet outside, and there were neither lizardmen nor beggars, but there was really no need to go out.

As for the special secret realm ancient gate he had been to just now, it should not exist tomorrow, and this thing would generally only exist for two days.

Yesterday day, today day, tomorrow this thing will change location to another secret realm, or disappear completely.

At least after the system is updated, it seems that this is the setting, ordinary secret ancient gates will always exist, and special secret ancient doors will appear randomly, just like the stone gates of underground ruins.

After Lin Yue gave Xiaobai some food, he sat on the comfortable sofa and opened the system panel.

The Main Vault is about to be upgraded.

He didn't want to go to the secret realm to hide before the catastrophe struck, and he didn't want to escape this disaster in the underground ruins.

This time the disaster, he was not afraid of the extreme heat, and the air conditioner was holding on, so he didn't have to worry too much about the temperature at all.

Even if the air conditioner breaks, he can replace it with a new one as quickly as possible, and in this room, 17 degrees Celsius is the constant temperature. It could even be said that if he could, he could get every shelter he built to the current temperature.

Tough to deal with are fire tornadoes and giant hailstones.

Especially with giant hailstones, the question of how big this thing will be.

If it is beyond imagination, with the material and thickness of his current shelter, I am afraid that he can't help but bombard indiscriminately—the hail will last for a few minutes to more than ten minutes, and if a huge hailstone falls from the sky at an extremely high speed, it is estimated that all the stone walls of his current shelter will be destroyed.

He could even imagine the shelter in ruins.

This is not alarmist, the first disaster is corrosive snow, and the second is an earthquake, but it also forces survivors to come out of the shelter to face the crazy mutated creatures in the night.

How long has it been since the third acid rain flood? The flood of acid rain can be rectified, and the larger hail is not too much.

Lin Yue didn't want to simply wait and see, waiting for the roof to be smashed before sighing how big the hailstorm was outside, his decision now was to put a layer of high-level insurance on his shelter.

After opening the system panel, he immediately clicked on the Vault screen.

【Upgraded Shelter Material】

Lin Yue saw this option.

[Upgrade the exterior walls and internal structure of the evacuation shelter to stainless steel, do you want to confirm it?] Stainless steel 700 units required】

That's a lot to ask for.

Lin Yue glanced at the storage space, there were 598 units of stainless steel, and then went down to the warehouse in the basement, and included the 102 units of stainless steel in the remaining stainless steel into the storage space.

While these can be used to build greenhouses, the most important thing at the moment is the stability of the shelter.

This was a very important question, and he didn't want his comfortable home, which he had built so hard, to be in ashes and ruins under the hail, under the ravages of the fire tornado.

And even if he had the materials for the glass greenhouse now, he would have to wait for the disaster to end before he could start building.

"Confirm the upgrade."

[Confirm that the exterior wall and internal structure of the upgraded shelter are stainless steel, and the evacuation shelter is being upgraded......]

A gentle white glow enveloped almost everything in front of him.

【15%、49%、87%…… End of Upgrade]

The voice of the system sounded again, and Lin Yue also saw it......

“emmmm…… Nothing has changed from the outside? ”

The walls are still the same color, and the style has not changed.

Lin Yue walked to the wall and knocked on it, and then carefully observed that the outermost layer was still stone, and it was ......

"This is the second and fourth wall? Upgraded to the 37 Wall, right? Boy. ”

The thickness of the wall that divides the room is much thicker than the second and fourth walls in the past, and Lin Yue also knows that this should basically be just a layer of rock on the outside, and a precious stainless steel alloy wrapped inside!

He walked near the door, and found that the walls had grown thicker, even thicker than before!

"Good fellow, four-two walls, huh?"

He took out the box ruler in the toolbox and measured it, and found that the thickness of the outer wall of the shelter was really much thicker, reaching forty centimeters!

This thickness ...... Scary belongs to yes.

Even if the hailstones falling from the sky are the size of a small watermelon, there is no problem.

There are two layers of extremely thick rock on the outside, and stainless steel alloy on the inside, and if you want to consider lightning protection, you can also make some articles on the outer layer.

Not to mention anything else, if there is another first disaster, there will not be much impact in it.

In fact, even if this main vault really can't withstand the disaster, he still has a more ultimate insurance - the alloy shelter that was established before.

If there really is a meteorite falling to the ground or something, it is estimated that it can be carried over.

"Now, it seems that hail is not afraid, and the fire tornado is fine as long as I don't put flammable materials or the like outside."

Lin Yue thought about it, there were actually some flammable materials in his hand.

Sulfur, saltpeter, and a little bit of diesel depot.

There are a lot of miscellaneous things piled up outside, and I have to find a way to put them away when the time comes.

Flammable and explosive materials such as diesel and sulfur saltpeter have to be put in storage space as much as possible, or put them deeper underground, these things have to be done, little by little, and as quickly as possible.

There are no lizardmen and beggars to cause trouble today, so so far, his entry and exit from the secret realm has been relatively smooth and efficient.

"Xiaobai, I shouldn't be able to go to the saltpeter mine today, you bring some food over later, and then when you come back, let's go to the secret realm again."

"Quack." Xiaobai nodded, and found that the master had taken out the parachute that had fallen from the sky before, and put a large pile of food in the thick cloth and tied it up properly.

Xiao Bai walked out of the shelter, held this big bag of heavy food in his arm, and quickly took off to the saltpeter mine, while Lin Yue came to several warehouses in the basement.

It's almost all covered with stacked treasure chests, and there's not much room to put your feet on.

Not only that, but in the corridors and in the various rooms, treasure chests also occupy most of the space.

"It's piled up." Lin Yue couldn't help but shake his head.

Although the ability of this 100% explosion treasure chest is powerful, to be honest, it also brings some inconvenience.

As long as you don't spend your time opening treasure chests, over time, treasure chests will become more and more numerous and denser.

"Now that Xiaobai hasn't come back, let's focus on opening the treasure chest. Little Liuzi, the red line, the two of you take the other friends to the window to guard, and I will turn on the air conditioner for you to ensure comfort. ”

Lin Yue filled the storage space with copper treasure chests and returned to the living room on the first floor to order the Xiaoice lizards.

It's boring to open a treasure chest, but you still have to pay full attention, and it's really dangerous if the lizardman or something messes with it.

The Xiaoice lizards obeyed the order and immediately went to the window, and Lin Yue also spread copper treasure chests all over the living room.

There are more than a thousand copper chests alone, good fellows.

"Well, whatever you say, you have to open it...... By the way, and the wooden treasure chest? Lin Yue remembered the wooden treasure chest that had been broken out by stepping on some small insects before, and frowned.

Before Xiaobai came back, he had to be busy.

"So, let's start with the Copper Chest!"

[You have obtained the area map X1, drinking water 4L pack x1 ......]

Lin Yue turned into a ruthless treasure chest opening machine, and he barely had the slightest intention of looking back.

Copper treasure chests don't open anything good, that's the case for him.

These copper treasure chests that other survivors dream of, for Lin Yue, who has already lived extremely rich, with enough food and water to live for five years, and supplies piled up in shelters and warehouses, the copper treasure chests are just touching the edge of a "chicken rib".

Now Lin Yue did sigh, fortunately, this treasure chest still has the function that the treasure chest will disappear after opening it, otherwise he would have to work a little more, and keep using high-precision research workbenches to disassemble the treasure chest.

As time passed, Lin Yue also unknowingly opened five or six hundred treasure chests.

He took a sip of iced tea, went straight to the basement, and put all the remaining copper chests and wooden chests into the storage space, and then began to continue unpacking.

Feelings were constantly being impacted and numb, and the remaining copper treasure chest in Lin Yue's hand was getting less and less.

Luckily, there were quite a few pieces of the regional map in the chest, otherwise he would have had to make a few trips to the warehouse to put the excess supplies away.

Finally, after opening the last wooden treasure chest, he finally breathed a sigh of relief.

"Finally...... It's over. ”

Lin Yue couldn't count the more than a thousand treasure chests, and he felt that what he had to do next time was to open the treasure chests as soon as he got them, without giving him a chance.

Opening the system panel, Lin Yue saw nearly five hundred more fragments of the regional map, and even had already put together nearly three-quarters of the area of this huge map, and thanks to this, he was also able to get a glimpse of the overall appearance of this huge wasteland where there were many refuge villages.

"It turns out that the wasteland is still divided in half by a mountain range...... And, it seems like I've been exploring quite a bit. Lin Yue looked at the plains, hills, and mountains marked on it, and even there were some things that looked like "rivers" and "lakes" in them.

He expanded the map and found that they were rivers and lakes.

This is probably what was left over from the last thunderstorm hurricane, or it could have been after the second catastrophic earthquake.

Lin Yue drank a few sips of iced tea, looked at it carefully, and found that there were really some markings for the refuge villages near the river.

It seems that it is true that there is a part of the population that does not lack water, and it is quite non-water.

The premise is that the water is drinkable.

Lin Yue continued to look and found a new feature.

Overall Scaling.

He tried to zoom the map as a whole, and soon noticed that the interface of the map for the entire area had changed.

The map of the entire wasteland suddenly shrunk to a small area, becoming a small dot in a much larger map.

It was also at this moment that he suddenly saw that there was a large area of "ocean" in the northeast and southwest directions of the periphery of the entire huge map, which was almost completely shrouded in black fog!

However, further on the outer side of this huge body of water, there is a circle of land, and on the edge of the ocean to the northeast, there seem to be several peninsula-shaped landmasses.

Not only that, but he saw an incomprehensible truth!

"The shape of this sea...... Wait, why is the shape of this sea so familiar? ”

Lin Yue looked at the shape of the ocean in the northeast corner, and felt more and more as if he had seen it somewhere.

In particular, the two peninsulas that protruded, one of which was in the shape of a boot, and there were two small islands next to it......

"Wait, this place...... What if you look at it the other way around? ”

Lin Yue turned the entire map over, looked at the boot-shaped peninsula covered in black mist, and suddenly woke up!

"No, it can't be!! What the hell is going on? Lin Yue couldn't help but exclaim!

Now in front of him, a completely insoluble question arises!