Yang Dan, Zhao Feiying, and Fluttershy, of course, will have no problem, and they pass through the security check and enter the waiting hall.

Once inside, you will need to use your ID card to get your evacuation number and enter the underground shelter in an orderly manner.

There are soldiers in the halls and in the shelter to maintain order, and anyone who dares to cause unrest will be arrested red-handed or even expelled from the shelter.

In the face of soldiers armed with high-tech weapons, people are very honest and consciously go to the queue to receive numbers and wait for the elevator.

Yang Shan hugged Fluttershy and looked at the luggage, Zhao Feiying took her ID card to get the number, and after ten minutes, she came back with a little disappointment.

"What's wrong?" Yang Shan Zou asked with a frown.

"I only got the two lowest numbers, and since we are not Fluttershy's immediate family, her relatives are unknown, and I don't know if her relatives have contributed points, so we can only give her the top number." Zhao Feiying shook his head and said.

"What then?" Yang Dan's eyes showed hatred again.

"There's no way, staying at the top is basically equivalent to death, and the probability of living is less than 10%, so I can only take her to the bottom with me and let her be in the same sleep cabin as me." Zhao Feiying said helplessly.

"Can the hibernation pod sleep two people at the same time?" Yang Shan was puzzled.

"At the bottom is the advanced hibernation pod, as long as you can squeeze in, it doesn't matter how many people sleep. Fluttershy is still young, so it's not a big problem to share the hibernation pod with me. Zhao Feiying nodded.

Yang Shan nodded with a cold expression and didn't say anything more.

They stopped complaining, sat down in a place where no one was around, and waited for the announcement to call them to take the elevator.

The structure of the underground shelter was previously known to Yang Shan from the Internet.

The underground shelter has five floors, with the lowest floor being 50 kilometers below and another floor every 10 kilometers ascending, and the overall shape of the underground shelter is an inverted pyramid.

According to the impact of the earth hitting the sun, the probability of survival of the lowest level is about 50%, and the probability of survival is reduced by 10% for each rising layer, and the survival index of the top layer is less than 10%.

There are 100,000 dormant pods on the lowest level of the vault, 1 million dormant pods on the fourth level, 5 million dormant pods on the third level, 10 million dormant pods on the second level, and 50 million on the top level.

After entering the hibernation chamber, as long as the underground shelter is not completely shattered and the dormant chamber is not destroyed, they can safely live for 10 to 15 years, waiting for follow-up rescue.

With the multi-layered shock-proof, pressure-proof, and heat-resistant structure of the underground shelter, it is impossible to shatter unless it is unlucky enough to explode.

So the dead are certain, and the living will definitely be there, depending on whose luck is good and whose luck is bad.

After waiting for an hour, it was finally Yang Dan's turn to take the elevator.

He and Zhao Feiying don't talk nonsense, and take Fluttershy and her suitcase to the corresponding elevator for inspection, and then enter the elevator.

The Soldier doesn't stop them from carrying Fluttershy and her suitcase, and the Soldier knows that the bottom is the advanced hibernation pod, and that one or two more babies are not a problem at all, so there is no need to be so ruthless.

After all, the greater the number of layers, the greater their contribution or the contribution of their relatives, and for the meritorious heroes and their families, the soldiers give enough respect and limited freedom.

With the contributions of Yang Qiguo and Zhao Feiying, it is not surprising that they got two excellent seats.

The elevator starts, falls rapidly, and lasts for 1 hour before slowly stopping.

When I got out of the elevator, I was already 50 kilometers underground.

Each floor of the shelter is divided into a lobby area and a dormant area.

The hall area is free to move around, just keep it relatively quiet, and the soldiers will not embarrass everyone.

The dormant area is more rigorous, and once inside, you must enter the hibernation chamber to sleep, and you must not linger at all.

The lobby area has resting supplies such as seats, while the sleeping area has only a fixed sleeping pod, which is densely packed and looks quite spectacular overall.

Exiting the elevator requires a check, and after checking that your identity is correct, you can enter the lobby area.

Yang Dan and the others entered the hall area smoothly, but they did not go to sleep immediately, but rested in a seat where no one was around, and accompanied each other for this last little moment.

Because once they go into hibernation, even if they survive, it will take years to be rescued, so it is necessary to spend time with each other and dispel the worries in their hearts.

There are no canteens in the underground shelters, and no food is distributed, so those who don't bring food can only go to sleep to avoid starvation.

Yang Dan brought a lot of nutrient solution, which was not a problem to support ten days and half a month, so they were not in a hurry to sleep.

Zhao Feiying gently placed Fluttershy on the wooden table, teasing her twice, then picked up the storage box, took out a pitch-black round cake-shaped jade and a small carving knife, and gently carved it.

"Mom, what are you doing?" Yang asks suspiciously, teasing Fluttershy with her fingers.

"We're going to go into hibernation, and I'd like to carve a jade pendant for you, so that if we are unfortunate enough to be separated, you and Fluttershy will be able to recognize each other one day." Zhao Feiying smiled.

"We'll be fine, we'll be rescued together." Yang Shan said firmly.

"That's the best, didn't I plan for the worst?" Zhao Feiying said.

"It seems to make sense, I'll record it too." Yang Shan nodded, took out a small notebook from the storage box, and wrote a diary seriously.

"Well, write a diary and give it to Fluttershy, your brother can be considered to have put some thought into it." Zhao Feiying praised.

"Who is going to write to her? I keep it for myself, so as not to have a bad brain after sleeping for a long time, and forget your mother, and I am not afraid of a bad brain if I have a notebook. ”

"Hehehe, it's all right, it's all right!"

"I'll go, she's still sensible, I said I wouldn't give her a notebook, she waved her hand at me, and murdered me?"

"Don't underestimate Die'er, she's very smart, just as smart as you were when you were a child."

“……”

It has to be said that a fun family needs new vitality.

The addition of Fluttershy makes Yang Dan much more active, chatting with her mother without feeling impatient at all, a bit of a competition for favor, afraid that her mother will only care about her little sister and ignore him.

However, Fluttershy seems to like him very much, and always wants to grab his fingers to nibble, and sometimes she will cry unreasonably.

In this way, although the activity space is only a little large, they have a very happy and relaxed life these days, and they don't have to think too much about survival.

Thirteen days later, they didn't linger in the hall anymore and applied to go into hibernation together, as they had run out of nutrient solutions and couldn't wait any longer.

The nutrient supply channel of the advanced hibernation chamber is connected to the gaseous nutrient supply equipment from the underground, so there are no wiring pipes in the dormant area, only one cabin, plus the corresponding huge cabin.

Accompanied by the staff, Yang Dan and the three of them successfully entered the corresponding sleeping cabin.

Yang Dan didn't take off the battle suit, just put it away and wore it as an armor vest.

It was the only relic his father left behind, and he would never throw it away with him.

…………