Lin Yuxuan gritted her teeth and finally nodded: "Be careful."

Xiao Yi turned and went into the passage on the right. The sound of footsteps gradually faded away. Lin Yuxuan pulled her sister and headed towards the warehouse.

The passage became narrower and narrower, and Xiao Yi had to crawl forward. The heating pipe was right above his head, and he could feel the faint vibration coming from the pipe.

Suddenly, an iron fence appeared in front of him. Xiao Yi took out the tools he had taken from the management office and started to pick the lock.

Just then, he heard the scavenger's voice behind him: "There's movement over here!"

Xiao Yi quickened his pace and finally pried open the iron fence before the pursuers arrived. He went in and found himself in a huge machine room.

Dense pipes and valves come into view. This is the heating center of the entire office building.

Xiao Yi quickly found the main valve, but he hesitated. Once the heating was turned off, everyone in the building would be in danger...

"Don't move!" a stern shout came from behind.

Xiao Yi turned slowly and saw a scavenger pointing a gun at him. Under the cold-proof mask, his eyes were cold and ruthless.

"Do you think you can save everyone?" the scavenger sneered. "In this world, the weak are eliminated."

A trace of determination flashed in Xiao Yi's eyes: "You are right, the weak should be eliminated."

He suddenly pressed the remote control in his hand, which was the heating system controller he had brought from the management office. In an instant, all the valves opened simultaneously, and high-temperature steam gushed out.

The scavenger screamed and was burned by the steam. Xiao Yi took the opportunity to pounce on him and snatch his gun.

"But," Xiao Yi said coldly, "how can you be sure that you are a strong one?"

He pulled the trigger and the scavenger fell to the ground. Xiao Yi quickly adjusted the valve and directed all the heating towards the warehouse in Area B.

At the same time, Lin Yuxuan and her sister had already arrived near the warehouse. They were surprised to find that the door of the warehouse was open.

"Something's wrong..." Lin Yuxuan said vigilantly, "Be careful."

They sneaked in and found that the warehouse was full of supplies, but no one was there.

Suddenly, all the lights in the warehouse came on. The boss walked out from the darkness with a few people, a smug smile on his face.

"I knew you would come here," the boss sneered, "you've really walked into a trap."

Lin Yuxuan protected her sister behind her: "What...what did you do to the others?"

"Those trash?" the boss said disdainfully. "Of course we got rid of them. Now, you're the only ones left..."

At that moment, the temperature in the warehouse suddenly rose sharply. The heating pipes began to make crackling sounds, as if they would burst at any moment.

"What's going on?" The boss looked around in panic.

Lin Yuxuan immediately understood Xiao Yi's plan. She pulled her sister back quickly, shouting, "Run! The pipe is going to explode!"

Before the boss and his men could react, the heating pipes burst. High-temperature steam instantly filled the entire warehouse, and screams rang out one after another.

Lin Yuxuan and her sister ran desperately, but were still knocked to the ground by the gust of wind. When they got up, the warehouse was in ruins.

"Sister..." the little girl said tremblingly, "Did we...did we kill someone..."

Lin Yuxuan hugged her sister tightly: "They asked for this..."

At this moment, Xiao Yi's figure appeared in the smoke. His face was tired, but his eyes were still firm.

"It's over," he said, "but..."

Suddenly, a roar was heard in the distance. The three turned around and saw several helicopters flying towards them.

"It's the military!" Lin Yuxuan exclaimed.

Xiao Yi's expression turned serious: "No...that's not the military..."

There were no markings on the helicopter, and a strange symbol was painted on the fuselage - a frozen earth.

"It's the 'Icebreaker' organization," Xiao Yi whispered, "an existence more dangerous than the Scavengers..."

The roar of the helicopter was getting closer and closer, and Xiao Yi quickly pulled Lin Yuxuan and her sister into a shelter.

"What is the Icebreaker?" Lin Yuxuan asked in a low voice.

"An extreme environmentalist organization," Xiao Yi stared at the sky. "They believe this cold wave is the Earth's self-purification, and they want to eliminate all 'sources of pollution'—that is, humans."

The little girl covered her mouth in horror. "Are they...are they going to kill everyone?"

"Not exactly," Xiao Yi shook his head, "They want to build a 'pure' new world where only the chosen ones can survive."

The helicopter began to land, and the wind and snow kicked up by the propellers obscured the view. Xiao Yi noticed that each helicopter was equipped with strange equipment, like some kind of launch device.

"We have to leave here," Xiao Yi whispered, "They will start the 'purification' process soon."

"But the supplies..." Lin Yuxuan looked towards the warehouse unwillingly.

Xiao Yi took out a small detector from his backpack: "I had anticipated that there might be an accident, so I hid some emergency supplies in the warehouse. Now, they are here."

The detector showed that there was a small storage room underground less than fifty meters away from them.

"Follow me," Xiao Yi said, "I know an underground passage."

The three of them moved quietly, using the cover of the building as a cover, and came to a manhole cover. Xiao Yi skillfully pried open the manhole cover and signaled the two sisters to go down first.

The underground passage was pitch black, but Xiao Yi seemed to know it very well. He led the two sisters through many twists and turns and finally arrived in front of an iron gate.

"This is..." Lin Yuxuan looked at the sign on the door in surprise, "Is this the bank's safe?"

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