It's late at night.

The fire passed through the gaps in the hay in front of the grass cave, filling the hay nest with hay nests, like in a dream.

Gu Yu did not sleep heavily. He was always worried that the little girls who were watching the night could not help but distract themselves and always enveloped each of them with infrasound waves.

Xiao Man'er woke up from her sleep. Her movements were very light. She quietly picked up an old thick bamboo tube sealed with hay, swept her eyes over Guyu and Tangtang, slowly squatted up, and put the bamboo tube underneath.

Then she held her breath and began to soothe the pressure on her bladder.

She dared not breathe because she could not control the sound, which would make her feel ashamed. However, this embarrassment was inevitable. After all, no one of them dared to go out of the grass nest to defecate. The low temperature would make all liquids freeze quickly.

It took her nearly a minute before she sealed the bamboo tube again, lay down again, turned around and hugged Guyu's waist tightly, and put her body on Guyu's back as little as possible.

It's more convenient to defecate.

Guyu taught them to line up dry and thin branches, directly discharge them on wooden sticks, and then throw them into the bonfire together with the dry branches, without wasting any fuel that provides heat.

Feces are also a good burning substance.

As for cleaning, it is to always heat a bamboo tube filled with water in the grass nest.

Under such conditions, humans can no longer maintain civilization.

In this way, civilization is just a supplementary product when resources reach a certain amount. The more abundant resources, the more developed the civilization will be until it finally takes the lead.

However, when the survival resources and environment are scarce or even desperate, civilization will collapse in an instant, leaving only the most primitive desire for survival for living.

The temperature is still falling, but the speed is slower. Only those who wake up after sleeping in the quilt for several hours can clearly feel that today is colder than yesterday.

After all, Guyu is not a complete plan. For example, he has misunderstood one thing this time, that is water.

According to his previous inertial thinking in the real world, he naturally thought that sudden cooling would bring heavy snow, but he ignored that the reason why the outside world would cause heavy snow due to the cooling is because there is heating flow in other places, and there is no here.

This incense burner landscape space has an overall reduction in entropy and no asymmetric temperature, so except for the beginning of the day when it snowed a little thin snow, there was no more snow here.

On the third day, they had consumed all the water originally stored and the frost and snow next to the tree house.

There is still a lot of thin snow in the distance, but no one dares to go down to make the snow back, that is asking for death.

There are still four bamboo tubes left in the monkey wine, which is the gift Gu Yu originally promised the three girls.

Faced with life and death, the three girls were not confused about these, but Gu Yu knew very well that this little monkey was not enough for them to survive, and they had to find a new source of water.

Therefore, on the third night, Guyu required that everyone's urine should not be wasted, and that it must be kept in the crude supervisor and not discarded.

The three girls knew in their hearts that urine would be the water for their lives to survive. Although they felt disgusting when they thought of it, no one complained.

What moved them was that Guyu would not allow the four-tube monkey wine to be opened until now, as if he was determined to leave it to the three girls as a gift.

But what surprised them was that Tangtang was thirsty before going to bed and wanted to use the bamboo tube that placed his urine to boil ginger roots to remove the smell and quench his thirst, but was stopped by Grain Rain.

"Tangtang, urine can only help you when you are extremely dehydrated, but it cannot be used as a long-term hydration, which will kill you."

Then, he put a frozen wild vegetable into Tangtang's mouth.

Tangtang suddenly felt a soreness in her mouth, and she brewed a lot of saliva, and her thirst felt much easier.

The three girls each had one in their mouths, and they were amazed, but they didn't recognize that this was the most common sour grass in the rural mountains and forests.

In the past, children in rural areas took a snack, but later they met fewer and fewer people. The most important thing was that scientific discovery was that sour sauce contains toxins. Although it is not fatal, eating it for a long time will cause great harm to the body.

Xiao Man'er, holding herbs in her mouth, looked at the dark sky outside worriedly and said:

"But, if we don't drink urine, what will we do next?"

This is the concern among the three girls.

Guyu comforted them with a smile:

"I will watch tonight, and I will not watch tomorrow. Believe me, when you wake up, we must have enough fresh water, clean fresh water."

The three girls were skeptical.

Guyu's expression was extremely confident, which made them feel inexplicably that Guyu could do this.

But the cruel reality is in front of them, which makes them suspect that Guyu is just comforting them.

Tangtang worried:

"Guyu, we are fine, how many days can we last. Don't go downstairs to make snow. The current temperature, even the steel knife can be frozen and crispy when leaving the bonfire tree house. No flesh and blood can live for ten seconds at such a low temperature. Please don't be stupid."

The three girls expressed their concerns one after another. They would rather drink urine than take risks.

Gu Yu was actually very moved. He could feel the sincerity of the three girls without any false concern.

So he smiled and hugged the girl one by one and threw it into the grass hole, saying:

"Sleep well, I'm not that stupid, we will all go back alive."

Pueraria root was quantitatively distributed by Grain Rain to ensure that several people could not starve to death. Under such conditions, the cold made people extremely tired. The three girls crawled into the grass hole, hugged each other naked to keep warm, and soon fell asleep.

Guyu Infrasound checked the heartbeats and breathings of several people, and confirmed that they were asleep. Then they approached the bonfire, opened their backpacks, and took out a heavy, purple-green thing.

He pulled out his dagger, opened his urinal, and stood close to the bonfire to prevent it from freezing, and then threw the purple-green object in his hand into the urine.

In just a moment, the purple-green thing began to expand and grow, protruding out long vines, curved, but quickly drilled out of the urinal.

The fruit of a beautiful woman begins to form at the end of the vine.

Guyu grabbed the mixture of Huo Ai and the mud ball on his body with one hand and the dagger in the other.

He said in a deep voice to the thing:

"Ruomu, absorb water and grow by yourself, don't think about it, otherwise I will cut off you and burn you to ashes."

Ruomu's eyes were filled with fear, and when it turned to look at the cold world in the distance, there was a hint of sadness in his eyes.

Guyu couldn't understand Ruomu's screams, but from that sad look, Guyu could guess something.

That is, Ruomu has experienced such a cold world.

Of course, this is only possible.
Chapter completed!