But their attempts all failed.

Without a code, no one in the underground shelter will be able to open the iron door!

In this sense, the underground shelter is an invisible prison, and if the energy is exhausted or something else happens, the humans inside can only wait for death.

Of course, there may be other situations, after all, it is also mentioned in Asimov's section that people in underground shelters can go out, after all, some of the controllers of underground shelters keep the password.

In any case, Wang Dashu now needs to open the iron door in order to leave the prison and continue to explore the location of the robot production base.

Reaching out and groping around the iron door, he found that there was a square-shaped slight bulge in the corner of the left wall of the iron door, probably for a long time, and there was a lot of dirt on it, which was difficult for people to find.

Obviously, they are not fools, Wang Dashu easily guessed that this square-shaped bulge should be the key to opening the iron door.

The left hand pressed on the square-shaped bulge, and suddenly exerted force, and the square-shaped bulge was a little stuck in, and then a password was raised from the inside to press the keyboard.

Very simple nine-square grid 1-9 numeric password press keypad.

As I've said before, he doesn't know the password.

But because of the problem of knowledge, he knew how to test this kind of numeric password.

Grab a handful of ash and sprinkle it on the password press the keypad and blow it gently.

In terms of Wang Dashu's comprehensive blessing to Aolins's attributes, Aolins' eyesight has reached a rather terrifying level.

At a distance of ten meters, he could see even a speck of dust in the dark, not to mention the traces of dust on the keyboard.

The buttons with signs of wear are 1, 2, 3, 5, 6, 9, and this numeric password is only six digits on the keyboard.

There are very few combinations of passwords.

Therefore, Wang Dashu only tested it forty-one times, and then he heard the sound of machinery behind the iron door, and then the iron door slowly opened.

Thankfully, the sound of the iron gate opening was so small that it didn't attract a crowd in the neighborhood.

In that case, it will cause him more trouble.

As the iron door opened, a pitch-black passage behind it appeared, followed by a dusty air current.

Wang Dashu stretched out his hand to probe the airflow, and his skin felt a trace of coolness, but there was no tingling or numbness.

This proves that there is not much nuclear radiation in the passage behind the iron gate.

But that doesn't mean those brawny men are spared.

After looking around, Wang Dashu walked into the passage with two strong men.

The one-meter-tall man carries two strong men, which looks very ridiculous.

The passage was pitch black, and with only a glimmer of light coming through the underground shelter, it would be impossible for a normal human to see what was going on in the passage.

But Wang Dashu is different, the perception attribute of up to 50 points makes his vision reach a level that makes normal humans feel frightened!

With just that barely visible glimmer, Wang Dashu was able to see anything in the passage.

The passage was sloping upward, very long, and even a long section behind it, because there was no light, even Wang Dashu could not see clearly.

However, the passage has wind flowing, which means that it leads to the ground.

By feeling the flow of the wind and the slight sound of the wind rubbing against the wall, Wang Dashu was able to establish a three-dimensional scene in his mind.

The passage is straight.

Wang Dashu sped up his movement, and the two strong men seemed to sense the danger and tried to struggle, but they were put on the ground by Wang Dashu and dragged forward.

This undoubtedly made them suffer more, but no matter how much they struggled, they could not break free of Alans's iron tongs.

After walking more than 300 meters, Wang Dashu encountered the second iron door, and the broken ventilation fan next to it was the source of the wind.

In the same way, make the iron door open.

On the rest of the journey, he opened seven iron gates.

After about 2,000 meters, we finally reached the end of the passage.

At the end of the passage is also an iron door.

An iron door that had been blown to pieces, and some scattered sunlight penetrated through the broken part of the iron door, and the dust jumped in the sunlight, like a butterfly in Brownian motion.

I was finally able to see what was going on on the surface.

Wang Dashu was a little excited in his heart.

This is an inexplicable excitement, of course, more from the influence of the doppelganger of Orans.

The difference between Wang Dashu's own subject and the doppelganger is not just like the master and the puppet, it should be more of a soul symbiotic relationship, after the mental connection, Wang Dashu can easily control the doppelganger, but the memory of the doppelganger will also be copied to Wang Dashu without reservation, thus bringing him a series of influences.

The only thing to be thankful for now is that his soul strength and intelligence attributes are high enough that even if there is some impact, it will not affect his mind.

The first thing Wang Dashu did after walking to the front of the passage was to throw the two strong men out.

After the two strong men were thrown out, they were stunned for a moment, and then they got up from the ground, and what happened next made Wang Dashu a little unexpected.

After looking up at the sky, the two strong men turned their eyes straight, and in an instant, they fell unconscious, and their bodies suddenly fell.

What's going on?

Wang Dashu probed the environment on the surface and found that there was no danger.

At least there is not much radiation on the surface anymore, and you can even see the blue sky.

This confirms that this time period has been a long, long time since the global nuclear explosions.

The global nuclear explosion is tantamount to a catastrophe for mankind, but for Blue Star, it is only a moment in a long history.

It will only take a thousand years for the global radioactive contamination to be cleansed by the forces of nature.

And the coma of the two strong men was entirely due to the fact that they had been in an underground shelter all their lives, and had never seen such an empty natural space, which produced a kind of vertigo.

Wang Dashu knew about this kind of vertigo, but in the initial time, the two strong men were in a coma that was too weird, making him think that the outside environment was potentially dangerous, and he didn't think about it in that direction.

The environment can be described as green.

Although the global nuclear explosion has turned most of the surface of the entire Blue Star into ruins, and there are huge craters everywhere, causing countless animals and plants to perish, there will always be some plants and animals that can escape and survive luckily.

And for thousands of years, without human domination and interference, these plants also covered the earth's surface.

This is completely different from Wang Dashu's previous imagination.