Soaking in potassium permanganate solution for 24 hours can remove residual toxic substances from the crystal nuclei.
The post-apocalyptic survival beginner's guide features prominent annotations in bold.
The crystal core purification method, which countless guinea pigs failed to crack in the previous life, is actually so simple.
Potassium permanganate tablets cost only a few dollars per box and are a common disinfectant. They can also be used as water purifiers when necessary.
However, in the previous life, the professionals and equipment capable of producing chemical drugs were monopolized by major bases, and ordinary people could not buy them even if they had money.
Fortunately, having learned a lesson from water pollution in his previous life, Lu Sheng stockpiled a large quantity of goods at low prices, never expecting that they would be of such use in this regard.
Although the system gave them an essence extraction machine for checking in, they still needed to give Sun Tiantian and the others a reasonable explanation.
Lu Sheng took out a bottle of potassium permanganate disinfectant tablets from his spatial storage, poured hot water into a washbasin, and threw one tablet in.
The water in the basin quickly turned purplish-red. Lu Sheng put all the crystal cores into the water, and immediately a trace of murky black substance seeped out of the surface.
A faint, almost imperceptible stench of decay rose from above the washbasin.
Lu Sheng pinched his nose and found another basin to cover it, which blocked the stench.
All the collective property was disinfected with potassium permanganate. Lu Sheng casually grabbed a few extra loot crystal cores from the remaining space and threw them into the essence extraction machine.
Squeak, squeak.
After pressing the start button, a few crisp crushing sounds were heard, and a small stream of clear liquid flowed out of the machine.
Lu Sheng collected the contents in a cup; the five primary crystal cores filled approximately 100ml.
I touched it with the tip of my tongue; it was icy cold and a little sweet, like rock sugar water.
"I hope this won't spray out after I drink it..." Lu Sheng stared at the sweet liquid in the glass.
Forget it, I'll just ignore it.
He tilted his head back and chugged it down in one gulp.
The sweet water slid down my throat, bringing a refreshing and soothing sensation to my lungs.
Lu Sheng felt all the fatigue in his body vanish, as if a continuous stream of energy was being injected into his blood.
I tried releasing my supernatural power.
Sizzle!
The giant ball of electricity formed from the fingertips startled Zhuangzhuang, who tucked his tail between his legs and shrank behind the sofa.
Previously, Lu Sheng would accumulate energy for a few seconds before releasing his electric abilities, and he would experience a brief period of fatigue after releasing them.
But now, after drinking a cup of sweet water, my back doesn't ache and my legs don't hurt anymore. I can easily generate 100,000 volts with a simple squeeze.
You would have to eat at least 10 wild Pikachu to get this level of electric-type boost.
Lu Sheng silently placed the essence extractor in the safest and most conspicuous spot in the space, and from now on, whether she was drinking soup or eating meat, she would rely on it.
After carefully storing the remaining crystal cores in the space, Lu Sheng picked up Zhuangzhuang and climbed onto the bed.
One cup a day is just right; taking too much at once can easily cause a nosebleed.
...
The next morning, Lu Sheng prepared breakfast and brought it to room 402.
Braised beef noodles, with chewy and springy noodles and a fragrant and sticky topping.
While Sun Tiantian and Xiao Yu were eating noodles in silence, he poured the purified high-grade enhancement serum into Sun Tiantian's juice.
There was also a book on ability conversion dropped by killing a small alien, and another piece of chocolate, which he secretly put into Xiao Yu's hot milk.
Before they had even finished their meal, the effects of the medication kicked in on both of them.
Sun Tiantian was the first to return to the bedroom. Xiao Yu forced herself to finish washing the dishes and then collapsed onto the sofa and fell asleep.
Lu Sheng held Zhuangzhuang and waited anxiously all morning before the two of them finally woke up.
Fortunately, Sun Tiantian awakened her frost ability, and Xiao Yu also awakened her water ability under the effect of the ability conversion book.
Lu Sheng: "..."
This world truly belongs to those obsessed with love.
After the apocalypse, strength-type and speed-type abilities will have some advantages in the early stages, but as more crystal cores are acquired, elemental and nature-type abilities will become powerful late-game classes as their ability levels increase.
Frost-type abilities are considered a very strong branch of elemental abilities, and they are even more powerful in watery environments, where they can unleash 200% of their strength.
Sun Tiantian and Xiao Yu are like conjoined twins, one icy and the other aquatic, perfectly complementing each other.
There's another hidden benefit: after awakening their ice-type abilities, individuals with these abilities have a much higher tolerance for low temperatures than ordinary people. At least during this period of extreme cold, Sun Tiantian will have an easier time.
"Will we no longer lack water to drink?"
Xiao Yu manipulated the small water ball in her palm, having a great time playing with Zhuangzhuang.
Zhuangzhuang tore the water ball apart with one paw, getting water all over its head, and meowed and whimpered at Lu Sheng.
“Using superpowers requires a certain level of proficiency, so let’s store some water first.” Lu Sheng put on gloves and a hat. “While the snow upstairs is still clean, let’s store some water first.”
The three of them brought all the large basins from the dormitory and wrapped them up tightly.
Two or three groups of people were already filling snow to store water on the top floor, and Jiang Lan was among them.
Fortunately, temperatures in Beijing can drop to minus ten degrees Celsius in winter, so most boarding students have at least two winter coats.
The snow on the roof was white and fluffy; if you put it in a basin and brought it inside to cool for a while, it would turn into clean water.
Lu Sheng and his two companions were shoveling snow with large basins when suddenly a heart-wrenching cry came from downstairs, sending chills down their spines.
"It looks like Bai Shuangshuang and the others..." Sun Tiantian peeked down.
A used Beijing Jeep was parked downstairs, and Su Zicheng and Li Xiang were lifting people out of the back seat.
"Oh, isn't this the most beautiful girl in the department? You've gotten so tired in just a few days." Xiao Yu still remembered Bai Shuangshuang's previous instigation of people to cause trouble, and she said sarcastically.
One of the girls carried out was Bai Shuangshuang, and the other looked familiar but whose name I couldn't recall. Both were disheveled, their hair was messy, and they were crying and wailing as soon as they got out of the car.
Bai Shuangshuang already had a leg injury, which made her walk with a limp. Now her posture looks even worse, and she looks like she's about to fall after taking only a few steps.
The other one wasn't much better off; he staggered into the building, leaving a trail of red dots on the floor behind him.
Su Zicheng and Li Xiang chatted obsequiously with the man in the driver's seat, and after a while, they threw several bags of rice bricks out of the car window.
"You've already paid homage to the helm?" Xiao Yu was completely puzzled.
In the end, it was Jiang Lan who helped the three of them resolve their doubts.
"Su Zicheng and Li Xiang somehow got involved with a gangster outside the school who collects protection money. In the last two days, they've already sent several girls from the building away."
“Those guys are all beasts, they played with the girls to death.” Jiang Lan’s expression was complicated as she silently tightened her collar. “The two who came back yesterday were covered in blood. I heard that when they went to the toilet, the sink was full of blood.”
"They make these beasts play for hours to get two bags of rice bricks, and then Su Zicheng and Li Xiang have to take 30% of it."
Lu Sheng sneered, never expecting Su Zicheng to be so clever, actually becoming a madam in the apocalypse.
"Is that the guy in the car the boss?" Sun Tiantian asked, pointing to the short, stout young man in the Beijing Jeep.
“Yes, it’s him.” Jiang Lan nodded.
Sun Tiantian's eyes widened in surprise, "Ah? He's just..."
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