Wasteland Survivalist: A Scientific Guide to Post-Apocalyptic Survival

Gu Lang pushed open several doors and turned a few corners before a narrow space appeared in front of him.

"Where is this?" Li Zheng asked curiously, turning on his flashlight.

"The visitor corridor is specially set up by the company to facilitate customer visits. During factory production, personnel access to the workshop is restricted. Without this, customers would have to enter the cleanroom. They would have to go through a process, such as putting on cleanroom suits, shoe covers, hand sanitizing, and air showering, which is very cumbersome and time-consuming."

"With this device, customers can closely observe the entire production process, from raw material intake, unpacking, manufacturing, packaging to warehousing, satisfying the leaders' desire to tour while saving them time."

"How do you even know this?" Li Zheng couldn't help but smile.

"Find a factory, work there for a few days and you'll see. By the way, this corridor is multi-functional. It serves as a fire emergency exit, and also as a passageway for people and goods. There are many small rooms along the way that can be used to hide gas cylinders."

As they spoke, the two arrived at a door in the corridor.

Gu Lang opened the sliding door, unloaded the first batch of gas cylinders, and carried them inside.

"Look, this place is even more perfect than I imagined. The overall structure is a figure-eight-shaped circular corridor with corners at regular intervals. We just need to let people in, and by the time they see their unconscious teammates in front, it will be too late."

Li Zheng smiled and gave a thumbs up.

After pinpointing the location of the trap, the two checked the time and sped up their work of moving the gas cylinders.

Then Gu Lang brought over a gas hose and a ladder, inserting one end into the gas cylinder's outlet and connecting the other end to the ceiling through a ventilation duct.

Li Zheng then used plastic sheets and quick-drying sealant to completely seal all the fresh air inlets and smoke exhaust outlets leading to the outside.

Next, they tested the airtightness of the corridor.

After closing all the doors, a plastic sheet was set on fire at the emergency exit.

Under the flashlight beam, visible smoke slowly billowed out without dissipating quickly, indicating that the airtightness of the area had achieved the desired effect.

After completing the preparations, the two exhausted people sat down on the floor of the production workshop to rest.

"If I were to act as bait, wouldn't I suffocate inside too?" Li Zheng started asking questions as soon as he had a moment to himself.

"Have you ever been to the Qinghai-Tibet Plateau?" Gu Lang asked in return.

"I've never been there. I went straight to the Navy after graduating from flight school."

"If you've ever been to a high-altitude area, you'll see portable oxygen respirators on the bus, one for each person. Look for them at the nearby hospital later; they're quite common, and pregnant women and the elderly use them."

Gu Lang got up and walked outside, with Li Zheng following behind.

The two sneaked into a hospital, which was still the familiar hell of flesh and blood.

Carefully avoiding various "people's fragments," after some searching.

In the end, Gu Lang found four portable oxygen cylinders in a well-preserved ambulance.

Li Zheng also gained something; he found a four-in-one gas detector that could detect oxygen concentration.

Gu Lang glanced at his watch; the hour hand pointed to 4 a.m.

After all that work, the anticipated danger did not materialize immediately, and the surroundings remained deathly silent.

The two decided to ditch their bulky and cumbersome disguises and travel light.

Then they immediately started the ambulance and quietly drove it back to the pharmaceutical factory.

Seeing that no berserkers had noticed, they simply started up the electric forklifts in the loading and unloading area.

Heavy equipment boxes and shelves were moved to the main entrances of the factory, roughly blocking off all areas except for the visitor corridor.

They then brought in all the trucks in the factory area and parked them haphazardly on the road, blocking other entrances and exits of the factory area.

"Alright, now all that's left is to lure the berserker into the trap." Gu Lang clapped his hands.

He rehearsed every step of the plan one last time, carefully considering the details.

After confirming that everything was correct, the two took out their watches and checked the time.

After changing back into combat uniforms and organizing their weapons and armor, the operation officially began.

Gu Lang climbed into the ambulance and drove it swaggeringly toward the area where, in his memory, the berserkers had gathered the most densely yesterday.

As the vehicle approached the building, he abruptly pushed a switch on the control panel.

"Waaaaah—waaaaah—"

The blue rotating warning lights on the roof pierced the darkness, and the piercing siren suddenly blared.

The echoes reverberated over this quiet urban area, filled with a sense of provocation.

The effect was immediate, breaking the deathly silence in an instant.

Mad screams echoed from inside and outside the building, followed by a flurry of twisted figures pouring out of the doors and windows.

"Bang!" A bullet whistled towards the ambulance, sparks flying from the rear of the vehicle.

Gu Lang immediately slammed on the gas pedal, and the ambulance engine roared as it sped toward the pharmaceutical factory.

To ensure the group of berserkers wouldn't lose him, he kept honking his horn, making a "beep beep beep" sound to maximize his taunt value.

This wasn't his first time being a "train king," and he was quite adept at it.

Sure enough, this series of actions thoroughly enraged the lurking enemy.

More and more rabids emerged from the ruins from all directions, converging behind his car into a deadly torrent that relentlessly pursued him.

As the ambulance rushed into the factory gate, Li Zheng, who had been secretly preparing, immediately appeared.

He rushed to the entrance and struggled to pull up the prepared retractable fence.

He then returned to cover, using the fence and forklift as cover, raised his automatic rifle, and began firing at the onrushing berserker vanguard.

The goal is to create as much disruption as possible to buy valuable time for Gulang.

Gu Lang rushed into the visitor corridor like a gust of wind, speeding along the pre-set route.

Open the valves of all the nitrogen cylinders pre-installed along the route one by one, and then lock the room door.

"laugh--"

"laugh--"

"laugh--"

High-purity nitrogen gas was released from 120 steel cylinders, producing a low and continuous hissing sound.

On the other side, Li Zheng had successfully launched an ambush.

Seeing that he could no longer stop the increasingly dense onslaught of the berserkers, he checked the time and picked up the portable oxygen tank he had prepared, as planned.

He put the mask on his face, took a deep breath, and quickly turned and rushed into the visitor corridor.

The two successfully met up in the central hub area of ​​the figure-eight corridor.

"The concentration is sufficient!" Gu Lang shook the four-in-one gas detector in his hand.

The entrance to the visitor corridor has two doors: a heavy fire door and an airtight door with a rubber sealing strip.

Both doors are equipped with automatic door closers; they will close automatically if pushed open without being deliberately blocked.

Even if the other side holds back two doors, the nitrogen won't dissipate so quickly due to poor ventilation.

The further the other party went in, the higher the concentration of nitrogen became, and the faster they collapsed.

Gu Lang and Li Zheng stayed in the central area of ​​the visitor corridor, each guarding a direction with their guns.

With his back against the cold wall, he awaited death, whether from his enemy or himself.