"Didi...... Didi ......" The mobile phone that had set the time rang on time, waking up Chen Xin, who was still asleep.

Reaching out and grabbing the phone, glancing at the time on it, Chen Xin put the phone back on the bedside table, and after yawning, he rubbed his face and sat up from the bed.

Picking up the clothes that were placed at the head of the bed, and just putting a shirt on his body, Chen Xin suddenly felt a cool air passing from the clothes to him.

Stimulated by this coldness, Chen Xin hurriedly retracted the quilt.

After wrapping in the quilt and warming up the clothes on his body with the residual heat in the quilt, Chen Xin poked his head out of the quilt and thought about what was going on today, it would become so cold.

It's not like it used to be, if it suddenly gets up so cold in the morning before the disaster, it is probably a cold snap, and it is not uncommon for the temperature to drop by more than ten degrees in one night in autumn and winter.

And the warmth effect of ordinary houses in the south is just like that, the outside world is cooled by more than ten degrees, and the house will drop at least three or five degrees or more without heating, and it is normal to get cold in the morning.

But now that it's the end of the world, Chen Xin lives in a shelter with good warmth, so it stands to reason that it shouldn't be so cold.

Could it be that there is a problem with the warmth of the ventilation system? This thought crossed Chen Xin's mind, but quickly dispelled it.

Although he feels cold now, it is only because he is not wearing many clothes, and he has just crawled out of the warm quilt and put on clothes that are relatively low in temperature, in fact, the temperature is not so cold that people can not accept it, at least there are a few degrees.

If there is a problem with the insulation of the ventilation pipes, causing cold air from the outside to pour in directly, the temperature will be at least below zero.

In that case, what Chen Xin felt was not cold but ice.

And he only covered a camel hair quilt last night, although the warmth effect is good, it is not enough to resist the zero temperature with a quilt.

Faced with this strange situation, Chen Xin didn't think about it anymore, and quickly put on the clothes next to him one by one, and crawled out of the bed.

After getting dressed, although Chen Xin felt that his body was still numb and cold because the temperature before the clothes was a little low, it was not to the extent that he couldn't stand it.

Especially after Chen Xin turned out the sweater and cotton pants that had been in the closet and put them on, he didn't feel cold.

Previously, because of the thermal insulation capacity of the shelter, even if the outside temperature fell below zero, there were still more than ten degrees in the shelter, as long as he wore a thicker coat and had to work usually, Chen Xin did not feel cold.

But today's sudden drop in temperature caught him off guard.

Before the disaster, Chen Xin might have been touching his phone to read the weather forecast before he got out of the bed, but now he can only go to look at the thermometer hanging on the wall of the living room after brushing his teeth and washing his face.

"Seven degrees? The temperature dropped by six degrees overnight, isn't it so scary? Chen Xin looked at the temperature on the thermometer, which had fallen to single digits, and couldn't help but feel surprised.

I am in the shelter, not to mention the surrounding reinforced concrete walls and the insulation measures made inside, even the ground temperature brought by the soil mountain more than 200 meters high above my head will not make the temperature of the shelter drop so much overnight!

Chen Xin was so strange that he couldn't even eat breakfast, so he left the living room and went to the public space, intending to check the ventilation system.

However, looking at the ventilation system that was still working well, and the cool breeze that blew out of the ventilation system with an obvious coolness, Chen Xin couldn't help but touch his face, he already understood what was going on.

Chen Xin didn't think much about it, it wasn't a problem with the ventilation system, nor was there anything wrong with the insulation of the shelter, unless he upgraded the ventilation system again or upgraded the shelter as a whole, this problem couldn't be solved.

After returning to the bedroom and turning out a temperature gun, after checking that it was still usable, Chen Xinyou touched a large tool hammer from the workbench, and then came to the maintenance room to change into protective clothing, and after putting on a protective mask, he took a flashlight and climbed into the small bunker where the communication antenna was placed through the passage in the corridor.

As soon as the door was opened, a cold wind came over the surface, instantly causing a layer of ice flowers to form on Chen Xin's protective mask.

Looking at the ice flower on the protective mask in front of him, Chen Xin reached out and touched it, and when he saw that he couldn't erase it, he didn't care about it anymore, anyway, it didn't affect his vision much.

Turning on the flashlight, Chen Xin glanced inside the small bunker, and sure enough, as he expected, a layer of ice had formed near the vent, and the gap between the small bunker and the outside world was covered with a thick layer of ice, almost pasting the entire gap.

Carrying the hammer to the edge of the gap, Chen Xin raised his hand and knocked it hard.

Fortunately, the ice is not very thick, although it is quite strong, but it can still be broken after a few knocks.

And as Chen Xin smashed the ice that sealed the gap, more cold wind poured in.

Chen Xin raised the thermometer gun in his hand and pointed towards the gap where the cold wind was pouring into the small bunker, showing that the temperature was -34 °C.

"Not really, right? Didn't you have minus 4 degrees yesterday? Thirty degrees in one night? Chen Xin couldn't believe it, this cooling was really terrifying, a bit similar to the horror of entering the ice age in the movie "The Day After Tomorrow".

However, if it really cools down by 30 degrees overnight, it is indeed similar to the effect shown in "The Day After Tomorrow", after all, the ice age is 8-12 °C lower than the normal temperature before the disaster, and it is not so exaggerated as it is now.

It's just that Chen Xin couldn't help but worry about another problem.

Before the disaster, the climate of the blue star was actually somewhat abnormal, and scientists said that because the environment was destroyed, and the solar activity cycle entered a minimum, the heat on the blue star weakened, and the blue star was about to enter a Xiaoice period.

It's just that this has always been just a statement, and the Xiaoice period that scientists are talking about has never arrived, although scientists predict that the time is within thirty years.

But now in the case of Blue Star, it is very likely that it will directly enter the ice age, or it is already an ice age.

If we enter the Ice Age, then it is expected that the long night of extreme cold for a hundred years may be stretched for a longer time.

Human beings are creatures that need a warm environment to survive, and although we have extended our range of activities to cold areas through buildings, clothing, heating and other means, this does not mean that human beings can survive for a long time in the face of low temperatures of tens of degrees below zero.

Even for polar expeditions, it is difficult to be outdoors for a long time, and most of the time they stay in the research station.