After a brief pause, Yang Shan threw the iron box on the bed with a little boredom and continued to pack up other survival supplies.

It wasn't until he had packed everything he needed to take that he opened the iron box on the bed, took out the high-end suit inside, and carefully studied it to familiarize himself with it.

Its appearance is a cuirass, Iron Man believes everyone has seen it, it has not been activated, just like Iron Man's breastplate, and after it is activated, it is also shaped like Iron Man's mecha, but it is far less powerful than Iron Man's mecha, and it may not even reach 1% of people's strength.

Even if the function of this thermostat is far from the ideal perfect state, it is no longer a problem to resist the general harsh environment, and it is a 'space suit', a suit that allows people to work in space.

Thermostatic suits are generally divided into three forms: the first form is a decades-old spacesuit with a glass cover on its head; The second form is popular in recent years, most of the whole body is a spacesuit, the head, hands and feet, knee pads and belts, these parts are all light steel mechas, and the defense is far better than the first form; The third form is a full-body mecha, a kind of thermostatic combat suit, which only the wealthy can afford, and is usually worn by soldiers who travel on military missions.

Of course, there are only three forms of thermostatic suits, but there are more than a dozen levels of functional strength and weakness.

It would be a big mistake to think that the two have the same function and strength just by looking at the same form of the suit, so the thermostatic suit is also called 'pretending to be a pig and eating the skin of a tiger'.

However, nowadays human beings are united, and there is basically no life-and-death struggle, so this term is not widely used.

I got a little familiar with the 'Cosmic Suit' in my hand, put it on and tried it on, played for more than an hour, and felt almost the same, before I took it off and put it back in the iron box, ready to take a bath and sleep.

Although there is no day and night in the dungeon, human beings cannot lack sleep every day, otherwise they will easily go into shock from overwork.

……

In the early morning of the next day, two hours before the departure of the convoy to the Beiheng underground shelter, Yang Dan and Zhao Feiying had breakfast before putting on thermostatic suits, bringing smart storage boxes, and walking towards the exit of the dungeon.

Zhao Feiying's thermostatic suit is the third form of mecha, and of course she doesn't have the money to buy this expensive suit, which is the reward she has received for making great contributions to the country before.

You know, when she was young, she was an excellent female soldier, and she had countless travel tasks, and she could complete them perfectly every time.

"Hehehe, after wearing this suit, the whole person is much more handsome." While walking, looking at Yang Dan, Zhao Feiying nodded with satisfaction.

Mecha thermostatic suits, helmets can be freely retracted, when there is no danger, you feel bored, you can put the helmet down, just like Yang Dan and Zhao Feiying now, there is no helmet to cover the head.

"Well, you've become much younger and more beautiful since you put on your suit." Yang Shan spoke very honestly.

"Not bad, yes, I've learned to praise the beauty of women, and there is hope for getting off the list!" Zhao Feiying joked.

"I'm telling the truth, Mom, you're a big beauty." Yang Shan didn't show much emotion.

Zhao Feiying smiled and shook her head: "Mom is old." ”

Yang Shan didn't say anything more and walked seriously.

Passing through the streets and alleys, the surrounding area is sparsely populated, messy, and full of garbage, and a dead silence is gradually spreading, and it is completely impossible to see that this underground city was originally an active city of hundreds of thousands of people.

When I came to the exit security checkpoint, there were only a few soldiers and soldiers, and there were also very few people entering and leaving.

If it was a few months ago, entering and exiting the dungeon would have to go through strict inspections, scanned by various instruments, and it would have been completely fine before entering and exiting.

But now there is no need, as long as you are wearing a thermostatic suit, you will not go out and die in vain, the security check will be released, and you don't need to check anything at all.

Seeing that the two of them had thermostatic battle suits, they casually scanned whether the battle suits were in good condition, and after there was no problem, the soldiers let them go and let the two enter the elevator.

"Remember to put on your helmet before you go out, don't get frostbitten, and good luck to you." The soldier was not bad, and kindly reminded Yang Dan and the two.

Of course, Yang Dan and the others would not be stupid enough to go out without a helmet, and when the elevator was activated, they let the helmet rise and seal their heads.

There were several other people sitting on the elevator together, all of whom were wearing first-form battle suits, so Yang Dan and them stood out among them.

However, everyone did not have too much intersection, and their expressions were seriously prepared to face the harsh environment, and there was no nonsense.

Yang Dan was a little nervous, after all, this was the first time he had left the dungeon, and because of his weak body before, Zhao Feiying resolutely did not let him go out, and he was not even allowed to participate in the internship class, so the surface world was a stranger to him, and there was a little expectation.

The dungeon is located 10,000 meters underground, and it takes half an hour to reach the surface at the speed of the elevator at a speed of 20 kilometers per hour.

Half an hour of waiting passed quickly.

When the elevator stopped, the door opened, and a cold wind howled, rushing into the elevator, feeling like a typhoon of eight degrees.

"Come out, hurry, hurry up and get in the car, don't grind!" Before Yang Dan could be stunned for long, a group of soldiers outside the elevator, one of whom connected to their conversation signal and urged them loudly.

The thermostats are fully sealed and soundproofed, and if you want to talk to each other, you need to connect each other's data information.

Under normal circumstances, the dialogue signal of the thermostat is open by default, and anyone can connect without deliberately turning it off, so it is normal for soldiers to be able to talk to the people.

Urged by the captain of the soldiers, the people in the elevator walked out one after another, and Yang Dan was also pulled out by Zhao Feiying and walked towards the nearest large loading truck in front.

With the assistance of the soldiers, the crowd quickly entered the loading cart at a rapid pace.

At this time, in the car, in addition to the main and co-driver and a team of five soldiers, there were dozens of ordinary people, waiting to move to the Beiheng underground shelter.

The underground city where they are located is the Beijing Underground City, and there are a total of 8 shelters in Huaxia, which are built under the three mountains and five mountains, and the Beiheng Underground Shelter is the closest one to the Beijing Underground City, which is fifty kilometers below the land of Beiheng Mountain.

After getting on the bus, the soldiers didn't care about them so much, as long as they didn't mess up, the soldiers didn't bother to pay attention to them.

Since the inside of the car is at a constant temperature, everyone takes off their hoods after getting into the car and does not get stuffy in the hoods anymore.

Zhao Feiying took Yang Dan to find a place where no one was to sit down, and after leaving the dungeon, she looked particularly heroic and chic, and the momentum of a heroine among women was full.

The loading truck has 80 seats, and 75 people are now seated, so we have to wait until it is full.

Yang Dan looked around, observing the loading truck and other refugees.

Although he has never seen a real intelligent loader, let alone sat on it, he is still familiar with their structural theories and some basic cognitions.

…………