A few people looked at the wall that should have been a gap in the panic, but no matter how they searched, they didn't find anything.

The walls are smooth as mirrors, without any gaps.

"Don't worry, be patient, this door may have another mechanism, let's try more!" Zhang Xiaohu said, so everyone used various methods, including the push and pull just now, and the side pull had no effect.

"me, I'm tired, boy, give me some water to drink!" After some searching, Yan Dacang's tired mouth was dry, and he said to Zhao Zixuan.

After King Peter was injured, the backpack he was responsible for was also changed to Zhao Zixuan's body, which was full of their food and water.

"Not good! Our supplies are still out there! Zhao Zixuan suddenly thought, when he entered the cave just now, he felt that the backpack behind him was too heavy, so he put it at the entrance of the cave.

"Quick! Hurry up and find the exit! Chenyi panicked. They are now trapped in this chamber, and most of their supplies are still outside, and the difficulties are very serious.

After more than an hour, the crowd collapsed to the ground, and they tried all the means they could think of, but the door was as if it didn't exist, and there was no trace of it.

"It's all my fault! It's all my fault! Zhao Zixuan slapped his head reproachfully.

"Can't blame you! Our biggest problem is being trapped here, and even if we have provisions, it's just two more days! Zhang Xiaohu comforted.

"But with provisions, we can support it for a long time, maybe we can figure out a way." Zhao Zixuan still feels that it is his responsibility.

"Boys, don't say any more boring words. You have a good brain, you have to think more about how to find the door, and think less about anything else! Yan Cannon took out two bear paws wrapped in charcoal dust from his backpack, apparently preparing to make a fire to eat it.

Li Yichen didn't say a word, his eyes closed as if he was thinking about something, and the goddess Chenyi was also thinking like her, and the movements of the two people were completely identical.

After Zhang Xiaohu observed this, he quietly moved to Li Yichen's side and covered her behind him, so that others would not notice the extraordinary similarity between the two people.

Standing in front of Li Yichen, looking at the girl with closed eyes, Zhang Xiaohu could finally take a good look at this smart and strong elementary school girl, he found that after nearly a month of running around, his originally beautiful and delicate face had lost a lot of weight at the moment, and his originally fair skin was also full of oil.

Zhang Xiaohu suddenly found a pair of big black eyes, looking at him in a flash, he quickly moved his head away, and said embarrassedly: "Yichen, what were you thinking just now?" Isn't there a good way for you to think of it? ”

Li Yichen said with a smile: "Hehe! Senior, you really can't lie, your eyes roll as soon as you lie. ”

Chen Yi also opened his eyes at this time, looked at the two people facing each other not far away, snorted lightly, walked in front of Zhang Xiaohu, and said, "You come with me, I have thought of a solution." She took Zhang Xiaohu to the secret room where the machine was placed before, and skillfully operated the machine, and soon, the virtual image resurfaced, and she heard the shouts of Zhao Zixuan and Yan Dacang suddenly coming from outside, "Door!" The door appeared! ”

Zhang Xiaohu was surprised: "How did you think that the door would have a connection with this image." ”

Chen Yi pulled Zhang Xiaohu and left, and said coldly: "Let's go out and talk about it, after a while, the image will be played, and the door should disappear again." She walked faster, and the wound on Zhang Xiaohu's back also hurt.

Zhang Xiaohu said angrily: "You obviously thought that you would go out in a while, why did you let me in!" ”

Chen Yi said coldly: "It's nothing! I just don't want you to be with her, it's annoying to watch! ”

Zhang Xiaohu was speechless for a moment, he had never heard that people would be jealous with him, but this time he felt it firsthand.

The two of them had just returned to the dark cave passage from inside the door when the door behind them had already disappeared.

After coming out, everyone ate some food, and Chen Yicai explained to everyone that she first assumed that the door would disappear, and she must have received some kind of instruction, but her group did not do anything to trigger the mechanism, only operated the machine by herself to play the video, so she suspected that the problem was in that video, which should attract everyone's attention through the image, and the command from the rear quietly closed the door and trapped all the entrants in it. No matter who designed this room, it shows that he has a vicious heart.

Everyone fled from danger again, and did not want to waste time, after all, there was not enough time left for them, and several people kept moving along the passage in the cave, and soon, the surrounding environment changed, and instead of being all monotonous granite, there were many irregularly shaped quartz veins, which were oily and shiny, and under the illumination of the light, they emitted milky white fluorescence.

With the appearance of quartz veins, a long and narrow huge mountain crack also appeared in front of everyone's eyes, and there was no road ahead, it seemed that this was the deepest part of the mountain.

The air was filled with a strong smell of rotten eggs, and even with a mask, you could smell it clearly, and everyone was sick!

"Lao Zhang! What a taste! So stinks! Zhao Zixuan endured his nausea and tried to put his clothes on his head to block the smell.

"I don't know!" Zhang Xiaohu also didn't know the source of this smell, the air here was still relatively dry, and it shouldn't be the smell of moisture and rot.

"It's the smell of hydrogen sulfide! Everyone is optimistic about their open flames, such a high concentration, a little spark enough to cause a chain explosion! King Peter said to them.

"Hydrogen sulfide! Poison it! Zhao Zixuan confirmed.

"Not only toxic, but also acutely highly toxic, a strong neurotoxin, inhaled in small amounts of high concentrations of hydrogen sulfide can be fatal in a short period of time. Even low concentrations of hydrogen sulfide have an effect on the eyes, respiratory system and central nervous system. After inhalation, you should take a lot of oxygen" King Peter panicked: "I think we should get out of here immediately, it's too dangerous, and you can see it, there's nothing here, our operation has failed this time!" ”

"Poisonous, then hurry up, I don't want to die here!" Yan Cannon picked up his backpack and was about to return the way he came.

"Wait! King Peter, how did this hydrogen sulfide come about? Chenyi asked.

"Biodegradation, microbial sulfate reduction, thermochemical decomposition, sulfate thermochemical reduction, magmatic genesis, are nothing more than these factors. What's the point of discussing this now, let's get out of here! King Peter felt a tingling sensation in his eyes, a foreign body, and a burning sensation in his nose and throat, which he knew was a sign of mild hydrogen sulfide poisoning.

Over there, Li Yichen has already begun to have violent retching and coughing because of his weak body! This is a reflection of hydrogen sulfide poisoning poisoning.

"Chenyi, I agree with King Peter's suggestion, we are tantamount to suicide here!" Zhang Xiaohu looked at Chen Yi and said what he thought.

"Alright, let's retreat to the original passage first." Chenyi himself also felt that his body began to have some reactions, and several people hurriedly ran back to the previous passage and stopped at a distance from this crack.

Several people's reactions were different, only Yichen had a brief coma, which startled everyone, but fortunately, Chen Yi brought a simple oxygen pack, and there was half a bucket of oxygen in it, and Yichen's situation improved after inhaling pure oxygen for a while.

"Looks like it's time for our operation to end!" Zhang Xiaohu sat on the ground, rinsing his eyes with clean water, his eyes were hot, and it seemed that he was also affected by hydrogen sulfide, and he always felt that something was blocked in his throat, and his voice was hoarse when he spoke.

Yan Dacang looked at King Peter and said with a smile: "I didn't expect that it would be of some use to take your kid, if it weren't for you this time, the uncle's hundred and ten catties would be buried here!" ”

"Why is there hydrogen sulfide?" Chenyi muttered to himself on the side.

"What's the matter, Chenyi, is there anything you can't figure out?" Zhang Xiaohu asked back.

"You heard the reasons King Peter say just now, but there is obviously no matching place just now."

Zhang Xiaohu suddenly understood what Chen Yi meant, and he replied: "You mean that those hydrogen sulfide were deliberately left there to harm people!" ”

King Peter said with a wry smile on the side: "Don't think about it so complicated, hydrogen sulfide is very easy to transform into other substances in the state of oxygen, and it is impossible to store it for a long time, there must be something in that place that can continue to produce this gas, I think the most likely is that there is an imperceptible gap nearby, which goes straight to the inside of the volcano, and it can form such a large concentration after a long time of volatilization and accumulation." Luckily, we brought our masks in advance, otherwise we would have been done as soon as we entered. ”

"Could that crack be where we're going?" Chenyi insisted.

"Lady God! You're not conscious, I said that it is possible to directly connect to the inside of the volcano, you want to die, but don't take me with you, even if you want to stay here for the rest of your life, it is better than death! King Peter's face was full of disbelief, things have come to this point, this goddess has to continue, if it is not an abnormal reaction after poisoning, it is really crazy.