The mechanical exoskeletons, flying motorcycles, and other products that could improve people's chances of survival in the apocalypse did not suddenly appear after the end of the world; they already existed before it.
The research and development philosophy of Country Z has always been to produce one generation, reserve one generation, research one generation, and pre-research one generation.
When people were using a product on a large scale in their lives, the second generation of that product might have already been successfully researched, the third generation might have been under research, and the direction for the fourth generation might have already been considered.
Before the apocalypse, these high-tech products either did not have the capability for mass production or the conditions for their application were not mature, which is why they were not pushed to the market.
However, in the apocalypse, there was no market large enough to purchase these high-tech products.
Moreover, with humanity on the brink of extinction, there was no point in holding reserves, and even the products under research had to be accelerated, with the sooner the results, the better.
Safety of application was disregarded as long as it could serve to combat natural disasters.
Therefore, these products that originally lay in laboratories all came out at once and were placed on the shelves.
It was not that human technology suddenly leaped forward after the apocalypse.
In addition to these reserved, researched, and pre-researched high-tech products, there were also some materials that were already used in special fields before the apocalypse or were extremely scarce.
At this time, no effort was spared to keep them, and they were all brought out, designed into new products adapted to the extreme weather of the apocalypse, and sold.
However, the price of each of these items was so exorbitant that most people could not afford it.
Take, for example, the all-in-one electric thermal cold-proof suit Tang Li bought. Its outer layer was coated with aerospace-grade aerogel, and its embedded temperature control device was also very advanced.
Not only was its cold-proof effect better than the extreme cold-proof suit the boss wore that day, but its heating capability was also stronger than the series of electric heating products the boss wore.
The electric heating device embedded in the clothes could heat key human body parts such as hands, feet, ears, knees, waist, shoulders, and neck, and could also automatically adjust the heating level based on external and human body temperature.
It was also more convenient to wear, requiring only one battery.
The only drawback was that thick clothing could not be worn underneath, as it would affect heat conduction and lead to inaccurate readings of human body temperature.
At 500 points, it was nothing to Tang Li, but for most ordinary people, it was quite expensive, equivalent to 1-3 months' salary.
It was fortunate that Tang Guo and Tang Li were similar in size.
After Tang Li bought this all-in-one electric thermal cold-proof suit, she could put it into her space and replicate two more, one for herself and one for Tang Guo.
If their body sizes were too different, and Tang Guo could not wear it, Tang Li would definitely not have been willing to spend 500 points to buy such an expensive cold-proof suit.
After drying her hair, Tang Guo went to boil water again.
Although there was a carbon heater in the living room, the quilt would still be quite cold.
With appliances like electric blankets unusable, they could only boil water to fill hot water bottles and put them in the quilt to keep warm.
After Tang Guo left, Tang Li put the power bank, hair dryer, and 5 electromagnetic pulse shielding devices back into her space.
Although Tang Guo already knew Tang Li had a space, Tang Li had never used it in front of her.
Tang Guo was also very cooperative; whenever Tang Li needed to put things away or take them out of her space, she would step aside.
Tang Li never admitted to having a space, and Tang Guo never brought it up again.
The two of them, without a word, operated in perfect, unspoken harmony with the space.
Tang Li was silently telling Tang Guo: Do not reveal this secret to a third person. Once a third person knows about the existence of the space, then this space will "cease to exist."
Tang Guo also understood that the secret of the space could not be known by others, so she acted as if the space truly did not exist and lived her life as usual.
After the hot water bottles were filled, they each returned to their rooms to sleep.
After the power outage, not only did the world fall into darkness, but even mobile phones, computers, and televisions were all rendered useless, with no entertainment life at all.
Now that the weather was so cold, everyone chose to go to bed early.
However, not long after Tang Li fell asleep, she heard a commotion outside. A moment later, she felt someone approach her bedside.