The system prompted:

“Do you wish to consume the other incinerators and wastewater processors and perform a comprehensive reinforcement on the selected incinerator and wastewater processor?”

“Cost: 400 survival points.”

“Yes.”

As the progress bar on the light panel filled, the three incinerators and two wastewater processors in front of Chen Yun vanished in an instant. In their place a single, silver gray metal rectangular prism appeared, measuring two meters wide, two meters high, and four meters long.

The front of the prism featured a one meter square funnel shaped feed chute. Inside the funnel were tightly interlocking, heavy shredding blades. Directly beneath the feed opening, a discharge slot led to the furnace’s combustion chamber, connected to the chute by a belt roughly one meter wide.

When waste was dropped into the funnel, the shredding blades reduced it to small pieces, which the belt then carried into the rectangular combustion chamber.

At the rear upper side of the machine, two thick exhaust pipes extended outward, pointing straight toward the ceiling of the waste processing chamber.

On the left side of the prism a handle opened a half meter deep compartment labeled “Ash Collection Bin.” All ash produced by the incineration process is gathered there. A Fuel Tank handle sits on the right side. A bundle of cables and pipes protrudes from the back, linking to the wall mounted power and water connections.

A short distance away, a massive silver white cylindrical unit towers over the water treatment area—larger than the filtration equipment there. It stands a little over three meters tall and about five meters in diameter. Its left hand inlet connects to seven wall pipes, while the right hand outlet links to the remaining three.

Domestic wastewater flows in through the inlet, is purified, then exits through the outlet to irrigate the farm and supply other non drinking uses such as toilet flushing.

The system’s light panel flashed:

“Incinerator (Advanced):

  Maximum chamber temperature 3,000 °C

  Processing capacity 2 t/h

  Combustion efficiency 95 %

  Exhaust purification 99 %.”

“Wastewater Treatment Tank (Advanced):

  Acceptable pH range 3–12…”

Chen Yun examined the specifications. Every metric matched or exceeded professional equipment. “The numbers look impressive,” he muttered. “I don’t understand all the details, but if the system built it, it must be top tier.”

He turned to the doorway of the waste chamber, where a one meter by seventy odd centimeter LCD panel was embedded in the wall— the control console for the incinerator and wastewater unit. After a quick study, he left the waste area and headed to the open space at the foot of the stairs on the ground floor, which he used as the basement’s living room.

Standing in the center of the basement lounge, Chen Yun surveyed the surroundings. He was about to reinforce the final module of his base: the air circulation system.

“Hope I have enough points,” he whispered.

With a gesture, two wall mounted air conditioners, a free standing unit, two steel ingots, and a handful of miscellaneous components—activated carbon molecular sieve filters, gas sensor modules, and the like—materialized on the floor.

He summoned the light panel, tapped [Reinforce], and mentally intoned, “Special direction reinforcement: base air circulation.”

The system prompted:

“Consume the current air conditioners and related materials to perform a targeted reinforcement on the base?”

“Reinforcement direction: Air circulation system.”

“Cost: 250 survival points.”

“That’s perfect.”

“Yes.”

The familiar progress bar filled, then the material vanished. On the dark gray walls, floor, and ceiling, several thick red light conduits materialized, criss crossing each other.

Chen Yun walked around the basement, tracing the red lines. At each entrance to a zone, a one foot long control panel glowed on the wall. Near the entrance to the lounge, opposite the distribution box, a one meter tall ash gray metal door appeared.

From that door the thickest red conduit sprang outward, then branched into finer red streams, which in turn split again, forming a network of red light spots that marked exhaust or outlet vents. The finer red lines eventually merged back into a conduit as thick as the original one, extending back to the ash gray metal door.

As the red light dimmed, a network of yellow light illuminated, thinner than the red but following the same pattern: emanating from the metal door, branching, converging, and “returning.”

After sketching the layout in his mind, the red and yellow lights faded, leaving only subtle grille vents and control panels embedded in the dark gray walls.

The system’s description clarified the design:

The red lines are the main ventilation ducts, directly linked to the outside.

The yellow lines form an internal circulation network that never opens to the exterior; it recirculates air within the base.

In hazardous external conditions—or when the base must be sealed—the system can switch to internal circulation mode.

At the heart of both systems, behind the ash gray metal door, sits an upgraded fresh air exchange unit and an air purification module. Their filters can be replaced by spending additional points.

Chen Yun dispersed the light panel, looked up at the ceiling vents, and felt a faint breeze stirring within the basement. He exhaled a long, relieved sigh and returned to the surface house.

The above ground dwelling had also been updated. Every room now featured a grille vent on the ceiling and a smaller control panel by the doorway. Lounging on the sofa, Chen Yun stared at the deep gray walls and whispered:

“Shelter side, food, water, power… I lack nothing now.”

A cold, synthetic chime rang in his mind:

“Detected: Host’s chosen survival base has been preliminarily constructed.”

“Task ‘Foundations of Survival’ – Phase 1 activated.”

“Evaluating current base…”

“Evaluation complete.”

“Phase 1 rating: B (Robust and safe; equipment largely complete; no obvious flaws).”

“Reward: 3,000 survival points.”

He paused, then thought aloud:

“Only a B rating, while my supply stockpiling task earned an A. There must be some flaws still lingering in my base. Still, 3,000 points is more than the A rated reward. I wonder how many points an A or S rated base would grant… I’ll have to keep improving and aim for an S next time.”

After a moment, his attention shifted to the other reward the system had issued:

“Survival Item Reward: Basic drone (standard model) × 2.”

Two identical silver gray drones hovered silently in the system space, ready for the next round of upgrades.