The chopping board finally stopped falling and began to slowly move forward. The surroundings were as dead as a cemetery.

This chopping board cabinet is about a little more than one meter, and the sea water is about half the height. Sang Yu and I both changed our skills to support the crossbar when we climbed, so we could breathe by ourselves.
Sang Yu and I tied some wood together with a bed and a table to make a simple raft. It was more than half a day before we reached the end of the big crack. Thanks to the help of five ghosts, we wouldn’t have arrived in a day or two.
When the Five Ghosts have a rest, we also eat again and have a rest-diving in deep water is both a question of temperature and depth. Sang Yu suggested that we’d better eat before we go, or the temperature of the water will drop quickly. When we insist on it for dozens of minutes,
Now I know what she said is correct. Although most of my body is curled up in the gap between the sea water and the top of the cabinet, I still feel cold and weak.
It only took ten minutes.
It is estimated that we must stay in the water for more than 30 minutes, which is less than half!
There will be no heating in it, and we can’t afford to consume too much gas.
"Well, it’s almost time." I feel that the carbon dioxide content in my breath is a little high. "I’m ready to start the first step." Sodium peroxide can absorb carbon dioxide and release oxygen, and it can also be released by water reaction. I chose a compromise. First, I poured sodium peroxide into a container to absorb carbon dioxide, which can reduce the carbon dioxide content and produce oxygen. After a certain time, when the sodium peroxide on the back surface is reacted to prevent it from further reaction, we will add water to it and the water will react to produce oxygen.
This device is an iron box that binds us and is fixed by our iron wire in all directions.
The process went smoothly, and the oxygen content in the cupboard increased. Sang Yu and I also put snacks, and I didn’t know what. Suddenly I had nothing to talk about. "Sang Yu, how deep do you think we are now?"
"Estimated not too deep? The world record of human oxygen naked diving is 15 meters, and the aerobic capacity is 35 meters. At most, we are about 200 meters. "Sang Yu dialect is particularly dull in this coffin box." The deepest tunnel under the sea is only about 200 meters. We should have no problem. "
Just as I was talking, I suddenly felt that there seemed to be two clicks on the counter of the chopping board-the agreed code!
Before we set out, we studied the tunnel for the last time. The tunnel has a U-shaped structure with a small amplitude, just like the width of the bottom of the dish is half the size of a football field, and the narrow place has six or seven squares, which is exactly the deepest part at the bottom of the U-shaped.
So we agreed that when we arrived here, we would call the five ghosts to knock on the face twice a time, which means that we should be prepared. It’s not that we are too cautious, but it’s too difficult. If I were in his situation, I would never want to leave my life in the hands of others.
The greater the diving depth, the greater the pressure. The gas in it will naturally be compressed, and the feeling of chest tightness and discomfort will become more and more obvious. I dare not dawdle. Soon I scooped up some water and poured it into the iron box. With the decomposition of sodium peroxide, the oxygen gradually increased. "Er, why didn’t the water level drop?"
Sang Yu said, I also felt that with this chopping board, the precipitation level is getting higher and higher, which is not right!
It stands to reason that we have promoted the chemical reaction of sodium peroxide water, and the amount of oxygen increases, and the pressure inside increases. How can the water level not drop?
"Isn’t it enough? Uh, why don’t I add some water?" This sentence is purely my guess. The chemistry class in junior high school is a little bit of material. How do you know what is going on with so much sodium peroxide and water?
I poured the water in and heard a grunt inside, and the water surface really showed a downward trend.
"Hey, don’t say that you really want to make me excited." Not only has the water level dropped, but it seems to be getting warmer … "I meant to tell Sang Yu that it’s not so cold. Suddenly I saw some light.
This light just appeared from the middle box, and then suddenly it started to burn.
It suddenly occurred to me that the reaction of sodium peroxide and water is an exothermic process. I didn’t pay attention before reading it. Who knew that such a large amount of drugs could cause direct combustion?
Oxygen promoted the combustion, but fortunately, the oxygen content in it was not high. If it was high, it would be strange not to explode directly.
The fire was immediately discovered by Sang Yu in front.
"It’s burning," she cried. "Put out the fire with water quickly. This woke up my spoon and I scooped up the water. It suddenly occurred to me that I couldn’t add it!
The more water you add, the more intense the reaction will be.
This is a fucking contradiction
"If you can’t add water, it will get more and more prosperous." I tried to reach out that spoon and beat it. Although I know it’s not big, it’s better than nothing, right?
I hit one and the wire broke!
As soon as the whole tin box is tilted, the sodium peroxide in it burns like porridge in a pot and falls into the water.
Isn’t this fucking tragic?
(er, the vice-president set up a group and asked me to help publicize the questions about metaphysics, Taoism, geomantic omen, Yin and Yang, ghosts, etc. After that, I answered the questions about it. Because it was very cold in the group, only a dozen people were talking about it. Please join the group if you support me. Don’t wave. Thank you, Vice-president! Group number 261225642)
Section ninety-six Weird disorder
Before we could respond, the fire went out and suddenly it was dark again.
Now that sodium peroxide is gone, we have just reached the bottom of this U-shape … it’s too long!
We understood the meaning in an instant.
"How … what should I do?" There is panic in sang Yu’s voice, which may be an illusion. I feel very crying.
"Let’s talk about it." I gritted my teeth. "Let’s see when we can hold on." Then I quickly estimated that there were still ten minutes to go, and now I don’t think I can hold on.
The oxygen is a little suspended here … I am very responsible for judging that we can’t make it!
"What shall I do?" Sang Yu was desperate to start turning around and shaking the cabinet from side to side, which made me feel like I was about to turn over. "Don’t move, I will yell," If you turn over, we will die. "
Sang Yu was frightened by me and stopped turning around, but the sense of force made her start sobbing. "Woo …" Although the sound was small, it was more harsh to me, and I couldn’t say how uncomfortable it was-a girl accompanied me to solve this nine-Eritrea, and she lost her life!
Sang Yu tried to suppress her crying, but that sniffle sounded obvious to me.
The sharp facial features became a knife at this time and severely cut my conscience.