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When it was almost two o'clock, Lin Chuan was woken up again.

"There's movement outside." Zeng Yu whispered.

He couldn't hear anything through the thick protective door, but after taking the stethoscope, Lin Chuan heard the sound of the rolling shutter door behind the door being slammed.

Zeng Yu looked at him nervously.

"It's okay, they can't get in." He comforted them.

As soon as the words fell, I only heard a "bang", which seemed to be a rolling shutter door breaking open, and then the protective door outside sounded "bang".

It's late at night and most people are asleep, but there are also many who can't sleep because they don't adapt to the environment.

The soft sound in the still night made them all sit up in shock.

A child began to cry, and the continuous "whoop" sound was like raindrops hitting the roof, almost in one sound.

"They can't get in." Lin Chuan said loudly. "There's a protective door outside!"

He saw that the faces of the people around him were pale, and everyone knew what the outcome would be after the loss of these gates.

Almost everyone was awake, but no one spoke except for the faint cry, their eyes fixed on the door nearest to them, listening to the faint crash of death's footsteps.

Half an hour later, nothing had changed, and people finally relaxed and fell asleep again.

Some people habitually want to smoke, but when they looked at Lin Chuan, who was leaning against the door with a gun on his back, he dispelled his thoughts.

"Brother Lin, how did you say they found us? We've all been hiding in such a secluded place. Zeng Yu asked.

"I should have heard the motor and the fan, or I could have smelled the smell we left behind." Lin Chuan guessed. "There must have been a lot of traces left by so many of us coming in and out of here during the day."

"It must be the smell." Zeng Yu said. "How can there be so many people untie their hands, I'm almost dizzy."

There was a small toilet in the fortification, but the excrement of more than 2,000 people was unimaginable, and they had to flush it with precious water every two hours, otherwise the smell would be unbearable.

Lin Chuan smiled and didn't talk, he really didn't want to discuss this aspect, but fortunately, Zeng Yu himself quickly changed the topic.

"What if they don't leave tomorrow?" He asked suddenly.

"How is that possible?" Jiang Ming said on the side.

"It's hard to say." Zeng Yu seemed to be energetic and continued. "They hide underground during the day, but we're underground now! What if they treat the passage outside as a nest and don't leave? ”

"Don't talk nonsense!" Lin Chuan pushed him with his arm, his last voice was uncontrollable, and some people heard his words and showed panicked expressions.

Zeng Yu also realized that he was almost spreading despair, and quickly shut his mouth.

But his question really crossed everyone's hearts, so that they were no longer in the mood to chat.

The light bulb suddenly turned on, Lin Chuan felt a little strange, he saw that the mechanic named Wang Qinian was waiting for the toilet next to him, so he walked over.

"The output power of the motor is fixed, and the bulb turns bright, indicating that the voltage has increased." After listening to his questions, Wang Qinian explained.

"Voltage rises?" The little physics knowledge in Lin Chuan University had long been returned to the teacher, and he was just alert to any abnormality. "Under what circumstances will the voltage suddenly rise? Is the motor faulty? "His first instinct was for everyone's safety." Do we have a spare motor? ”

Wang Qinian shook his head with a pale face.

"An increase in voltage means that less energy is being consumed." His eyes widened, as if he had thought of something very terrifying.

Lin Chuan looked around, the TV had been turned off, and now the only place to use electricity was lights and ventilation equipment.

Ventilation equipment?!

He turned his head to look at Wang Qinian and pointed to the ventilation duct, who nodded slowly.

"There are six ventilation ducts, but we don't know which one is the problem right now." Wang Qinian said profusely sweating. In order to prevent panic, they only called Zhang Guohui and Ma Guoming over.

"If it's just one pipeline, it shouldn't make a difference to us, right?" Ma Guoming asked. He looked at the six large fans on the wall, all of them were spinning slowly, and he couldn't see what was wrong. The damaged fan must be at the outlet of the ventilation duct.

"This place is not designed to shelter so many people, and you can feel that the air is already very turbid, and if there is another problem with the ventilation duct, people who are in poor health may go into shock due to lack of oxygen!" Chen Jian was pulled over, as a student at the medical university, he is currently the most authoritative medical expert in civil air defense fortifications.

"If that's the case, that's fine, I'm worried about the consequences of being stricter." Lin Chuan said in a low voice. Wang Qinian said that during the day, they had checked every fan very carefully and maintained it, and it made no sense that it would break down in just a few hours. Unless something crawls in from that end and jams the fan. ”

"Where are the exits? What does it look like? Zhang Guohui instantly understood the strict nature of the problem.

"It's all in the green belt on the side of the road, and in order to prevent rain, they are all downward-facing U-shaped structures, and the diameter of the pipes is about 60 centimeters." Wang Qinian was about to cry in a hurry. "Originally, there was an anti-rat net, but after we looked at it during the day, we thought there was no problem."

"Anti-rat nets?" Zhang Guohui couldn't wait to pinch him to death. "Didn't I tell you to have to plug up all the holes?"

"But we have to rely on it to ventilate, and we can't block it!" Wang Qinian said with a sad face. "I thought the blades were spinning fast all the time and they couldn't have come in from there."

"If something goes wrong, it's all your responsibility!" Zhang Guohui lowered his voice and shouted.

Suddenly there was a strange noise from the motor, and after a few moments the light bulb became brighter.

"Oops!" That's what I thought in my heart.

"Is there a rodent net in the pipe?" Lin Chuan still holds on to a glimmer of hope.

"Probably not." Wang Qinian shook his head in despair. "The pipes are too long, and there are fans at both ends, so I didn't look closely."

"We've all been killed by you!" Zhang Guohui said angrily.

"Don't talk about this, we have to find a way now, and when all the fans stop, these two thousand people won't survive." Lin Chuan interrupted them.

"Unless we can open the door and get out." Zhang Guohui said angrily. "It's only half past three, and the rats are still bumping outside."

Everyone frowned, Lin Chuan recalled last night's experience, and suddenly had an idea. "Do we have a steel frame? Or is it an iron frame? He asked.

"Yes, in order to put more things, I moved it down." Ma Guoming replied. "What's the use?"

"These rats are huge, and these doors are very thick, so we can put a shelf behind the door against the door and open the door a crack." Lin Chuan replied. "As long as there is a slit in the door on both sides, convection can be formed."

"No way!" Zhang Guohui flatly refused. "It's too dangerous, if there's a mistake...... No, it's absolutely not going to work! He shook his head and said.

"Last night, Li Mingfeng and I just relied on two people to resist a door, and they didn't rush in all night, it doesn't make sense that now there are so many people." Lin Chuan said. "It's not that dangerous."

"Even two cracks can't let in much air." Zhang Guohui is still opposed. "It's not worth the risk."

"I build yì vote." Seeing that he couldn't convince him, Lin Chuan proposed another Jianyì.

"No way!" Zhang Guohui was a little anxious. In addition to him and Ma Guoming, Wang Qinian will vote against here, and there are five people on Lin Chuan's side. "It's not fair to vote like that!"

"What then?" Lin Chuan asked. "The air quality is getting worse and worse, and if it drags on, there will be problems soon!"

"I agree with Lin Chuan's plan." Wang Qinian said suddenly.

"Do you know what you're talking about?" Zhang Guohui was angry all of a sudden. "You caused this, and you're embarrassed to talk nonsense?"

"Lao Zhang, don't get excited!" Ma Guoming came out to play the round, and the survivors around him had already heard their quarrel.

"They're going to open the door!"

"Crazy? It's all monsters out there! ”

"I heard that the exhaust fan is broken!"

"Nima, I see who dares! Lao Tzu doesn't believe it! ”

"You can't do this, you're going to kill everyone!"

The people were furious all at once, and soon the others were also woken up, and there was a chaotic sound in the civil air defense fortifications.

Lin Chuan and Wang Qinian explained the reason loudly, but it didn't help at all in such an environment.

"It's all that kid in a military uniform!" Suddenly, someone said loudly, Lin Chuan was looking for the source of the sound, but saw that the gang he warned in the first half of the night was fueling the crowd and inciting everyone's feelings.

"He's the one who broke the fan! Let him be responsible! "They pushed the crowd in this direction, and many people didn't understand what was going on, so they followed the majority.

"Calm down! Calm down, everyone! Don't mess around! Lin Chuan shouted with all his strength, but he looked so pale and powerless in the chaos.

"Da da da", in the chaos, suddenly a gunshot sounded.

Bullets ricocheted off the wall and then splattered in a pool of blood in the crowd.

Lin Chuan turned his head, and Zeng Yu looked at him dumbfounded, his muzzle was diagonally pointed at the ceiling, still smoking green smoke.

"I ...... I just want to calm them down. He said in a panic.

"Murder!!" Someone screamed hysterically.