On the side, the two people except Xu Xin were already sweating profusely.
"Hmm... It's so hot. Let's cool down the tree house." Li Wenxi said, wiping the sweat from his forehead.
"Ah..." Xu Xin suddenly remembered that the current temperature in the room was not something they could endure for a long time.
The temperature in the room is 45 or 46 degrees. No normal person can stand it.
At this time, the blue saltpeter in the basin has completely precipitated and turned into powder.
As long as more water is added, the surrounding temperature can be lowered.
Looking at the blue powder, Xu Xin suddenly had an idea.
Before, he had been using blue-grade saltpeter. In his tree house, the blue-grade saltpeter used for cooling was consumed very slowly. So far, no piece of blue-grade saltpeter had been completely consumed, and no piece had even shrunk significantly. Therefore, this was the first time he saw the powder precipitated after the blue-grade saltpeter was dissolved.
If it's this powder...
Compared to stone-like saltpeter, would this powder dissolve instantly, absorb a large amount of heat, and cause a crazy drop in temperature
It's really possible.
… Let’s not use this for now, it might be useful in the future.
Xu Xin put away the basin, took out another basin of water, and threw two pieces of saltpeter into it.
The temperature around began to drop slowly.
At this time, the man who had taken a pill and was now peeling a blue-level orange had almost recovered and was looking at Li Wenxi.
"Wenxi, how do you feel today..." She looked at Li Wenxi and felt something was wrong. Some thoughts in her mind even made her blush.
"Ah? Ah... Hehe!" Li Wenxi laughed, "How about me today? Do I make people want to get close to me?"
"Yeah, a little bit indeed." Li Yajun nodded honestly.
"Hehe, because I have..." Li Wenxi explained to her.
"How can it be like this?" Li Yajun was very surprised.
"Okay, let's talk about these things later. Has anything happened around here during this period of time?" Xu Xin asked Li Yajun.
Li Yajun shook her head and said, "Nothing happened. I didn't fall asleep until about 2 a.m. last night. Before that, nothing really happened. But..."
Li Yajun looked at the basin, a hint of doubt flashing in her eyes.
"What's wrong?" Li Wenxi asked.
"Well... I came here around ten o'clock last night, and chose your bedroom, a small room, and used two pieces of blue saltpeter to cool it down. It wasn't until around two in the morning that the two pieces of blue saltpeter were used up."
As she spoke, Li Yajun took out a basin of slightly turbid water from her backpack. This was water in which saltpeter had been dissolved.
"Oh?" Xu Xin understood what she meant. "In other words, these two pieces of blue saltpeter were working from 10 o'clock last night to 2 o'clock in the middle of the night. They lasted for four hours?"
"You've been holding on for so long. I thought you had to change it every two hours." Li Wenxi was a little surprised.
Qi Xuefei told her that in order to maintain the temperature in her culture room, she needed to change the temperature every two hours.
However, that is because Qi Xuefei's culture room is very large, and even when the temperature reaches 60 degrees at noon, it only needs to be changed every two hours.
For this small bedroom of more than ten square meters, changing it once every four hours is indeed sufficient at night.
"Yes." Li Yajun stuffed a slice of orange into her mouth, chewed it, and thought, a little puzzled, "Now, it's not even six in the morning yet? It's less than four hours before I go to bed? Moreover, in order to avoid problems due to too little saltpeter, I put three pieces of blue saltpeter in the water, but..."
After hearing this, Xu Xin finally understood what was wrong.
The time for saltpeter consumption doesn't match.
From ten o'clock to two o'clock in the middle of the night, two pieces of blue saltpeter kept the temperature of the room constant for four hours.
When he first sent a voice message to Li Wenxi's tree house, it was just a little after five o'clock.
By that time, Li Yajun was already unable to wake up and could not get through to the voice call.
From two o'clock in the middle of the night to five o'clock in the morning, it's only three hours.
Besides, it wouldn't be possible that Li Yajun would get heatstroke and be unable to wake up as soon as the room temperature became warmer, right
This will take some time to settle.
In other words, the three pieces of blue-grade saltpeter used later were almost completely consumed in just two hours.
… Why
Li Wenxi also reacted at this time: "Huh? This time is indeed wrong... But, I was saying, Yajun is such a careful person, how could he get into trouble because of something like this."
She put her arm around Li Yajun's shoulders and said, "I wrongly blamed you!"
Li Yajun shook her head: "It's really my fault. I didn't think it through. If you hadn't come here, I'm afraid I would really..."
But she also had some doubts.
Why
She clearly put one more piece in.
"Could it be because the saltpeter is of different sizes and the saltpeter age is different?" Li Wenxi speculated.
Li Yajun shook her head: "No, although the blue-grade saltpeter does have different sizes, the difference is very small and can be basically ignored. Besides, didn't I put an extra piece in there?"
"Then... if you put one more piece in, the dissolving speed will be about the same, it will just make the temperature lower, right?" Li Wenxi argued.
"Even if that's the case, the difference won't be that big." Xu Xin shook his head and denied the idea.
"Hmm... Indeed, the difference is too big..."
"... My idea is that during the time you were asleep, there was a period of continuous high temperature, so even though you put an extra piece of saltpeter, it was consumed early." Xu Xin speculated.
This was the most reasonable explanation he could think of.
High temperature will accelerate the consumption of saltpeter, which has been proven by comparing Qi Xuefei's cultivation room.
"This..." Li Yajun fell into thought.
"It was hot again last night?" Li Wenxi was a little surprised, but then nodded, "That should be the case. Otherwise, if Yajun was so careful, this wouldn't have happened. This kind of weather is too troublesome..."
Normally, the lowest temperature of the day is before sunrise.
In other words, from the time Li Yajun fell asleep at two o'clock in the middle of the night to the time of sunrise, the temperature should have been dropping continuously.
According to common sense, there should be no problem with the three pieces of blue-grade saltpeter she prepared.
However, there are too many things in this world that go against common sense.
They were indeed on guard against things that might happen at night, but including Xu Xin, they all felt that even if there was danger at night, it would only be something like an invasion by mutant creatures.
But I didn’t expect that it might be a high temperature late at night!
No one expected the high temperature at night!
"This possibility is the greatest." Li Yajun also agreed with this view. "Under high temperature conditions, saltpeter will be consumed too quickly, but... why does the temperature soar in the middle of the night when there is no sunlight?"
She was still very confused.
"There are so many whys in this world." Li Wenxi felt that it was useless to think about this kind of thing. "Then why do you think the temperature was minus 20 to 30 degrees Celsius the day before and soared to 40 to 50 degrees Celsius the next day?"
"This..." Li Yajun was speechless.
Indeed, it is really difficult to speak reason in this world.
"… But there were signs." Xu Xin shook his head. "Even in this world, things won't change for no reason. The temperature is too high now, obviously because of the sunlight. I don't think the people who brought us here can control the stars or the intensity of the sunlight, so if we have to explain it, it's probably because there's something wrong with the atmosphere of this planet."
The atmosphere is a planet's life-protecting umbrella that absorbs and retains heat, preventing a planet's temperature from being too high or too low.
This is also the reason why the temperature difference between day and night in places with high altitudes and relatively thin air is much greater than that in places with low altitudes.
Moreover, the sunlight in high altitude areas will be particularly strong, and the skin of people from high altitude areas will usually be darker.
Therefore, the problem now is most likely that something has happened to the atmosphere, causing some problems, which is why today's sunlight is so strong and the daytime temperature is very high.
Although it is quite outrageous, at least it can be done. After all, haven't humans on Earth created several large holes in the ozone layer
But... what happened at night
Did the temperature at night really rise suddenly
Not only did it not decrease, but it actually increased
hateful…
His tree house has a constant temperature system. As long as the windows are not opened, it will not be affected by the temperature outside. This made the survivors living in his tree house, including himself, unaware of anything last night.
They just felt like they were having a normal night.
But... if the temperature suddenly soared again last night as he guessed, then the tree house without a constant temperature system would probably have problems like Li Yajun's.
If those people were able to survive, someone must know something.
But now the channel systems are blocked, and he can't get any information from the regional channels or the world channels.
The people around him all live in tree houses with constant temperature.
Even Ji Chaoyang, who paid close attention to environmental changes every night, did not notice anything last night.
Xu Xin narrowed his eyes slightly.
What happened last night must be clarified.
This abnormal phenomenon at night might be the breaking point of this hot summer!
Moreover, they don’t have any other direction to work towards now. After the hot summer, the mysterious voice has not appeared once since then.
"I'm going to the tree house area of other people. What are you going to do? Will you come with me, or..."
"You go first. I'll stay here with Yajun to rest for a while." Li Wenxi said, "Besides, I have to go to the smelting room to take a look. Please come back to pick us up when you're done."
"Let's go to the smelting room now. Isn't it hot?"
"I have to go even if it's hot, but the smelting room is very hot anyway, I'm used to it."
After coming out of Li Wenxi's tree house, Xu Xin directly activated the portal and first arrived at Wen Guixin's place.
Coincidentally, Wen Guixin just swung down from the tree house.
She looked anxious at this moment. When she saw Xu Xin, she was immediately startled and looked alert: "Who are you?"
Xu Xin was now completely wrapped up, with only her eyes showing, so she naturally couldn't tell who it was.
"It's me, Xu Xin!" Seeing that she was ready to draw her weapon, Xu Xin quickly explained.
"Xu Xin?" Wen Guixin recognized his voice and was a little surprised. "Why are you dressed like this? Are you planning to rob someone? But you came at the right time. Something happened here! Just... come to my tree house first. It's too hot outside!"
Arriving at her tree house, she began to briefly describe what had happened that morning.
It turned out that someone in her tree house had gotten up early, walked to the window and looked at the rising sun outside.
The result is predictable.
The man's scream woke up most of the people in other rooms. Then someone got up in the morning as usual and looked out the window. It happened to be the sunny side, and he got injured again.
There were even injured people shouting: "Outside...! The sun...!"
Then someone looked outside out of curiosity: "What happened to the sun...ah!"
By the time everyone had almost figured out the situation, six people's eyes had been hurt by the sunlight.
The person with the most serious condition had blood coming out of his eyes even when he closed them.
Wen Guixin heard the screams and ran over to find out what happened, then gave them pills for treatment.
After handling the situation, she immediately tried to contact other people, but found that she couldn't contact anyone.
Their tree houses are not as close to each other as Xu Xin's. The tree houses on their side are far apart.
The distance is too far, and we can’t get in touch directly!
So Wen Guixin asked these people to stay in the tree house obediently and not look outside, and then he hurried down to try whether the teleportation array could be used.
As a result, I just saw Xu Xin teleporting over.
Xu Xin nodded.
This was basically consistent with what he had imagined.
With no contact with the outside world, someone has to use trial and error to figure out the current situation.
The price Wen Guixin paid was not small, but fortunately there were pills that could recover from her injuries.
This is the case with many people, if there is only one person...
Then you can only try and error yourself.
The other survivors in this world are probably in dire straits and wailing...
"It's like this..." Xu Xin also briefly explained the current situation to her.
"Today's sunshine is actually..." Wen Guixin murmured to herself.
"So, you'd better not go out." Xu Xin pointed to the place outside the shadow of the tree canopy where the sun shines, "Otherwise, your skin will probably be sunburned immediately."
"No wonder you wrapped yourself up like this." Wen Guixin understood the situation and sighed, "You really have it hard. It must be hot to wear this. I was ridiculously hot just a few seconds after I went out. You wrapped yourself up so tightly..."
"I have a random increase in high temperature resistance today, so I'm not hot." He explained briefly.
"Random amplification? Well, your thing is really convenient." Wen Guixin was not very interested in random amplification. After all, it had nothing to do with her. "I understand the situation. I didn't notice anything last night. I'll go ask those people if they found anything unusual last night."
She went downstairs and came back up soon.
"How is it?" Xu Xin asked.
Wen Guixin shook her head: "They all slept well last night, and no one noticed anything unusual."
That's normal.
Without Wen Guixin's permission, these people could not go down from the tree house.
It's so hot today, even if they wake up, they won't have the leisure to open the window.
So even if there was a high temperature last night, these people would not have noticed it.
Just like the survivors living in Xu Xin and Ji Chaoyang’s tree house, they found nothing.
After saying goodbye to Wen Guixin, Xu Xin immediately rushed to the next tree house.
Qin Yunlong and Qin Yunhu are currently staying in Zhao Xiaochuan and Wang Lei's tree houses respectively, so he quickly ran around the two tree houses and understood the situation.
The situation is basically the same. The chaos experienced by both tree houses has now stabilized.
Unfortunately, the same situation occurred on their side and no one noticed anything unusual last night.
"You must be mistaken, aren't you, Brother Xin?" Wang Lei scratched his head and asked, "Why is it so hot at night? There's not even any sunlight."
Xu Xin frowned.
…At present, only the situation on Li Yajun’s side can indicate that something abnormal happened last night.
"Anyway, don't go out today. Just stay in the tree house."
"I understand, Brother Xin. I was just thinking of taking a break." Wang Lei agreed, "It's just that I can't contact the outside world, so I feel a little restless."
It’s as if the cell phone has no signal and no internet, and anyone would be panicked.
He returned to Li Wenxi's tree house, picked up the two of them, and returned to his own tree house again.
Then he contacted Ji Chaoyang and told him the current situation.
“… I don’t know about the abnormality at night, but it is indeed a big suspicion. We will know tonight what happened at night.”
Xu Xin thought so too.
I won’t sleep tonight.
Tonight, he wants to see if there will be any abnormalities.