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And the structure of this underground shelter is no different from an ordinary house, it has everything it should have.

Except the bathroom is independent, other kitchens, study rooms, living rooms, bedrooms, all have no independent compartments, all are open, but divided into regional plates.

This design, in terms of engineering, greatly saves the disposable space.

According to Yin Yanyan, she seemed to have experienced a battle after she came down, and all the bottles and jars were smashed.

Except for those alloy tables, chairs and beds, the rest are all smashed, and the things that can be used can be counted on one hand.

Compared with Su Heng, Yin Yanyan did not find anything and materials that could improve the level of science and technology from the remains of advanced human civilization.

However, Su Heng was the next dungeon. She picked up a high-level shelter for nothing, which was already very good.

This shelter is built in the mountains. As long as there is no earthquake, tsunami and other disasters that can destroy the mountain, Yin Yanyan is absolutely safe to live here.

"By the way, Brother Xiao Su, why did you and Sister Yan go to Wuqu Bay?"

Su Heng briefly explained the purpose of his coming here.

"Is that the saltpeter mine?"

Su Heng nodded: "Well... I told you before that there will be a very dangerous alien beast near the mine."

"If you want to mine, you have to kill that alien beast first."

Yin Yanyan looked at the two people who were dirty and covered with dirt and dust, and it was obvious that they had experienced a fierce battle.

"Ah, is it that Brother Xiao Su reminded me not to pick up saltpeter beasts?"

"I saw it once!"

Yin Yanyan excitedly provided information to Su Heng.

"How much do you know about it?" Su Heng asked.

If Yin Yanyan had met it and could know what kind of beast it was, Su Heng would be able to find its weaknesses and shortcomings from the monster illustration, and use this to formulate a battle plan.

In the mountains and forests, the one-horned silverback, the burst arrow, the Glock 17, the C-18 assault rifle on the big blue hand, and the big gray grenade were all fired.

Although a newly acquired Ak-47 can shoot 100 rounds of bullets, Su Heng is not sure whether it can cause substantial damage to this high-star alien beast.

If there is another beast with rough skin, thick skin and extremely high sensitivity like today, then the mission to explore the mineral veins this time is likely to fail.

"I don't know much, but I have seen it."

"Its facial features are very similar to people's, and its eyes are so small that it is almost invisible."

"Most of the time, I run on all fours and stand still like a human being."

"The skin is black and white to the extreme, and the body is thin and weak, but it runs very fast. I feel that it runs faster than a cheetah."

Su Heng was a little puzzled.

Su Heng seems to have seen this kind of creature described by Yin Yanyan...

"Is the back of its head particularly long?"

"Yes, yes! Its head is like an upside-down dolphin, extending all the way to the back, which is particularly terrifying!" Yin Yanyan affirmed.

Su Heng was startled, and he glanced at Yan Wan subconsciously.

Both of their faces became extremely ugly.

Because the creature that Yin Yanyan described to guard the saltpeter mine is not an alien beast, but an alien!

This creature is extremely brutal and highly resistant to electricity.

Knowing that passing through the electromagnetic fence will cause damage at the level of dismemberment, but still can't help the killing and bloodthirsty instinct hidden in the DNA.

This is a creature that is even more terrifying than an alien beast.

Su Heng would rather fight another 5-star alien beast than face this creature.

In the darkness of the night, Su Heng dealt with them.

Relying on the protection of the electromagnetic fence, Su Heng did not suffer any losses.

But in the wild, things are quite different.

This time, Su Heng was the attacker.

"How do you generate electricity here? This thing should not be some kind of renewable clean energy. It seems to be electricity."

"Maybe we can contact Dr. Li and make some electromagnetic weapons?"

Yan Wan put forward her idea.

"No, it's definitely too late."

Su Heng shook his head and denied it.

Dr. Li did not have this kind of technology in his hands, and even if he did, the time would be too late.

"There are nearly 100m2 of solar panels on the top of the mountain, which can supply electricity here."

"But the only electrical facility in the room is this overhead light..."

"If you need electricity, I can take you up to get electricity."

"100m2 solar absorber panel?"

"According to this power generation, it is more than enough to supply a shelter!"

Yan Wan simply calculated an account.

Calculate the power supply according to the standard solar panel, which can supply 1200 degrees per day.

This daily power generation is enough to supply even a small factory.

"Sister Yan, you are right."

"On the top of the mountain, there are about six such shelters."

"But those air valves are dead, and this shelter is the only one that can be opened."

Su Heng suddenly had an idea in his mind.

"Xiao Yin, you just said that you had a face-to-face encounter with that alien beast. Did it find you or see you?"

Yin Yanyan thought for a while, and replied, "We had one look at each other."

"I found it lingering at the foot of the mountain that day, so I hid and watched."

"Originally it was walking on all fours, but in an instant, it slowly stood up and looked straight at me, so scared that I quickly hid in the shelter."

"The next day, after I came out, I found that it was still standing underneath and didn't even move!"

"However, it didn't take long for it to leave Wuqu Mountain and return to the forest over there."

This is a little strange.

There are many doubts in Yin Yanyan's words.

A creature like an alien, since he discovered Yin Yanyan's target, he didn't go up the mountain to tear her to pieces, but stood there all night?

Su Heng was puzzled.

Even if you are not afraid of the high-intensity current of the electromagnetic fence, why not go up the mountain?

Her words just confirmed what Su Heng had just thought.

"It's observing." Su Heng said calmly.

The two looked at each other, not knowing what Su Heng was talking about.

observe?

"There are things on this mountain that it is afraid of. It wants to go up the mountain, but it is afraid of certain things on the mountain, so it has been observing."

Su Heng's idea is not without reason.

There are at least three kinds of creatures in the apocalypse.

One is the original alien beast that existed in the first place.

One is human.

The other is alien creatures.

According to the available evidence, humans have been dropped once a few years or even decades ago.

It's just that the last time it was cast were Blue Star humans from other parallel worlds.

Like humans, they have a long civilization and more advanced technology.

If Su Heng's analysis is correct, there are still many undiscovered "relics of sages" in the doomsday world.

These human sages, with advanced technology, have survived longer than them.

If they can use their technology, they should be able to fight against alien beasts and aliens.

"Xiao Yin, take us to see, maybe I can open other shelters."

"now?"

"Now."

Yan Wan had absolutely no idea what Su Heng was thinking.

She had a lot of doubts about Yin Yanyan's words.

These doubts made her unable to fully trust Yin Yanyan.

From the first time she saw Yin Yanyan, she felt something was wrong.

Where can someone dress up so cleanly in the last days?

One bite of "Sister Yan" and "Brother Xiao Su" made Yan Wan feel an inexplicable panic.

She doesn't feel safe here, instead she is worried everywhere.

In the final analysis, it was Yan Wan's subjective conjecture that she did not trust Yin Yanyan.

It's just that Yin Yanyan is too enthusiastic.

It may be that Yan Wan's psychology has some small problems, which makes her too sensitive.

However, the heart of defense is indispensable.

On the way up the mountain, Yan Wan held the soil shotgun tightly, ready to pull the trigger at any time to deal with emergencies.

After walking out of the cave, the sky was completely dark, and Su Heng and others had to light torches.

"Xiao Yin, if you rarely go down the mountain, how will you get the supplies?" Yan Wan began to test her side-by-side.

"Ah, this..."

Yin Yanyan glanced at Su Heng secretly.

Yan Wan and Brother Xiao Su seem to be in a relationship now.

The two stand together very well, especially in terms of temperament.

If she tells the truth, will it cause some unnecessary misunderstandings?

Yin Yanyan didn't know how to answer for a while.

It seems that no matter how you answer it, it is not quite right.

"She is my little assistant and helps me manage the 'business' of the exchange. I will pay her a salary every day, enough to support her life."

Seeing Su Heng helping him out of the siege, Yin Yanyan secretly breathed a sigh of relief.

Su Heng said this, in fact, there is another layer of meaning.

That is, I knew her earlier than I knew you, so I don't have to doubt it anymore.

Seeing Su Heng's end, Yan Wan stopped asking questions.

In order to make Yan Wan look good, Yin Yanyan also added: "Sister Yan, there are actually two pieces of standard disaster-resistant soil left on the top of the mountain, which is completely enough for me to be self-sufficient."

Su Heng was a little surprised.

"Do you still have disaster-resistant soil?"

Su Heng's disaster-resistant soil was provided by an outsider.

"Ok…"

"how many?"

"About 100m2, but most of them were destroyed by alien beasts flying in the sky. I searched for a long time before I found 2m2 that could be planted normally."

2 square.

Actually a lot.

Under such conditions, there is land to live.

Not to mention 2 square meters, that is 1 square meter. Harvest every 3 or 4 days. If you eat vegetarian every day, you will not starve to death.

"Arrived!"

After walking for about ten minutes, the group came to the middle of the mountain and found the second cave on the mountain.

The height and width of this cave are similar to the bottom layer, and it is easy to see that it is from the same group of people.

After walking a distance, Su Heng saw the underground manhole cover.

"Brother Xiao Su, under normal circumstances, as long as you press this thing, the electromagnetic pressure of the safety door can be released, and it will pop up by itself, but look..."

Yin Yanyan tried the button several times in a row, but the security door didn't respond.

Su Heng illuminated with a torch.

This underground security door, like the one he had seen in the dungeon, was very hard and sturdy.

If the device is damaged, it is difficult to open by external force.

When the bullet is fired, it may rebound and injure yourself.

It's even more impossible to blow up with a grenade. This thing is very solid. I'm afraid that the cave will collapse first if the door is not blown open.

Su Heng didn't want to be buried alive.

"Simple."

"It looks like there is a problem with the sensing device that connects the door to the device. It just needs to be repaired."

"Can you repair it?" Yan Wan also looked at the device in detail.

For concealment, the device is made very small.

Even if you are proficient in the working principle of the device, you can rashly start without a monocular magnifying glass.

"Brother Xiao Su, you are amazing, did you graduate from MIT?"

Su Heng smiled wryly and shook his head.

"You misunderstood, I won't fix it."

"Then how to open it?"

Su Heng snapped his fingers and called Xiao Hei over.

Xiao Hei first scanned it with its own sensor, and then the robotic arm was converted into a very small and mini screwdriver.

It took less than 5 seconds to get started, and it was fixed.

"Can you really fix it?"

Su Heng tried to press the switch.

"Sigh~"

The electromagnetic pressure of the safety door begins to release little by little.

With a "da~" sound, the security door bounced open.

A cyan light was released from the crack of the door.

"Brother Xiao Su, shouldn't there be people living here..."

Yin Yanyan was a little worried, a flash of fear flashed on her face.

"probably not."

"Even if there were people living in it, they would have died long ago."

"It's been so many years."

The bodies of those human sages are roughly the same as human beings, but there are still some differences.

They are generally tall, but Su Heng doesn't think they can live for a hundred or two hundred years, and the average lifespan is at most eighty or ninety years old.

The security door was completely opened, and three people and a tiger surrounded them to observe the situation below.

Just like what Su Heng imagined, it was empty.

The structure of the room is exactly the same as the shelter Yin Yanyan currently lives in, but it seems to have a higher sense of technology and retains many items from that time.

When Su Heng was about to go down, Yan Wan stopped him.

"Wait. UU reading www.uukanshu.com"

Yan Wan threw the torch in her hand.

Seeing that the torch was burning normally and was not extinguished due to lack of oxygen, he was relieved to let Su Heng go down.

"You go first, I'll be the last." Yan Wan shook the earthen shotgun in her handshake again.

The defenses in her heart have not been completely lifted.

"Lolo, stay on top, it's tiring to hold you up and down."

After Su Heng finished his instructions, the three of them went down the ladder to the shelter.

There is no one in this sanctuary, there is no trace of fighting, but there are traces of normal life.

The folds of the quilt on the bed, the sundries in front of the sofa, a book and a few pages of manuscripts that were not closed on the desk.

"Where did the people here go?"

"what!!"

Hearing Yin Yanyan's exclamation, Su Heng and Yan Wan hurried to the bathroom to check the situation.

Two people in protective suits and helmets collapsed in the bathroom.

The walls, floors, and glass were all bloodstains that had long since solidified.

Lifting their helmets, the two had already turned into two skeletons.

"What exactly happened here?"

Yan Wan didn't understand, why would she hide in the shelter and kill each other?

If it is said that the sanctuary where Yin Yanyan lives now is an irreconcilable difference, is it the same for these two people?

What is it that can deter the violent and bloodthirsty alien creatures and dare not go up the mountain?

The remaining shelters built in the mountains were explored one after another, but no clues were found.

In the end, when the three of them approached the top of the mountain, the highest and last underground shelter, the mystery was revealed.