The wind and sand of the Scorched Fault carried an acrid smell of metal oxidation that was enough to set one's teeth on edge. Ma Feili stepped onto the red crystalline silicon debris, the soles of his boots emitting crisp *crunching* sounds.

  Ada walked ahead, her chassis presenting a cold, matte finish under the faint afterglow of the star. She had just completed a deep logic reorganization, and her status was currently at a 100% peak. Her every step precisely avoided the high-radiation fissures, and the blue sensors in her eyes pulsed rhythmically, synchronously relaying the neural pulse archives she had just parsed.

  "Ma Feili, entropy increase is an irreversible theorem, but within the ashes of the Great Evacuation Era, I have discovered some 'Quantum Residual Debts' that defy thermodynamic intuition." Ada's voice came through the neural link, cool and textured.

  As she narrated, the scene of the scorched earth seemed to overlap in Ma Feili's vision, hallucinating into the eternal, dusky twilight of Kepler-186f.

  ***

  In the settlement known as "New Winter," Resource Allocation Officer Li Ming was an anomaly. In an era where humans were forced to quantify every breath of oxygen into credit points, Li Ming retained a generosity that bordered on luxury.

  Han, a vehicle mechanic who spent his days drowning in fictional reality and couldn't even scrape together enough energy for his life support system, was the most frequent recipient of Li Ming's aid. When Han knocked on the airlock door for the last time to borrow one unit of "High-Energy Isotope Fuel Cell"—enough to power a base station for a full year—Li Ming pressed confirmation on the authority terminal.

  That was the beginning of the contract, and the prelude to a disappearance. Carrying that ghostly blue battery, Han vanished behind the isolation gates of the Starport, never to return.

  "Li Ming never intended to call in this debt," Ada lightly leaped over the wreckage of a mechanized rodent, its metal skeleton glowing faintly in the radiation. "But in a logically closed universe, favors can be forgotten, while contracts seek equilibrium like quantum entanglement, crossing space and time to find balance."

  Years later, Li Ming, now transferred to the "Xiao Si" Deep Space Observatory, saw Han in a hallucination after waking from cryo-sleep. It was no longer the decadent mechanic, but a solidified, solemn projection.

  "Sir, the oxygen and water were charity; they need not be repaid. But this battery is a contract. Receiving aid increases the entropy of the soul; the contract must be closed."

  The projection disintegrated into blue pixels. Subsequently, the base station's bio-printing bay experienced an unprecedented logic overflow. A semi-biological heavy-load drone, codenamed "Han," was automatically cultivated. It was pitch black, robust, and its sensors flickered with a spirit resembling a human gaze. It became Li Ming's sole retainer in the silent starry sky.

  Until years later, during a high-gravity operation, the drone forcibly overclocked itself to protect Li Ming, causing its bio-alloy joints to snap completely.

  "The final part is where the logic is tightest." Ada stopped, turning to look at Ma Feili, the wind of the scorched fault ruffling the bionic fibers at her neck.

  Li Ming sold the scrapped drone to a wandering scavenger. Months later, he received a remittance of nine hundred interstellar credits.

  "That was Li Ming's share after the scavenger resold the parts. And according to the interstellar market rates at the time, nine hundred credits, after complex exchange rate calculations, was—neither more nor less—exactly equal to the value of that unit of 'High-Energy Isotope Fuel Cell' from years ago."

  ***

  Ada deactivated the narration mode, the blue light in her eyes returning to a steady state.

  "This is *Colony Archive #152*. Han used another life form to precisely repay that quantum residual debt. In the ruins of entropy, integrity is the only closed loop that can combat chaos."

  Ma Feili looked around. Several mechanized birds were circling above the fault, their wings slicing through the radiation-filled atmosphere, emitting a low hum.

  "So, you brought me deep into this scorched earth for some kind of 'closed loop' too?" Ma Feili asked.

  Ada didn't answer directly. She pointed to a massive shadow faintly visible beneath the fault ahead—an ancient reactor half-buried in crystalline silicon dust.

  "My logic core tells me that while the radiation readings here are lethal, they conceal some kind of 'equivalent' capable of hedging our current depletion. Let's go, Ma Feili. The universe accepts no outstanding debts."

  Support creative writers by reading their stories on Royal Road, not stolen versions.

  She stepped forward, her chassis performance maintaining its peak state, guiding him toward the unknown depths of the darkness.

  ---

  The sandstorm whipped up by the thermonuclear winds displayed a sickly rust-red hue, hitting the nano-coating of the power armor with a fine, devouring *hiss*.

  Ada walked beside Ma Feili, her logic core running at 100% peak power. In her visual compensation algorithms, this dead scorched fault was not just a physical wasteland, but a shattered web woven from radiation streams and decaying signals.

  "Unnatural energy fluctuations observed, Ma Feili." Ada's voice was clear and stable in the comms channel, without a hint of a tremor. "1.2 kilometers directly ahead. The ruins of Ophiuchus Beta-4—a Life Seeding Tower from the 'Great Migration Era.' Strangely, it is broadcasting an ancient encrypted protocol known as 'Visitor Pulse' on all bands."

  Ma Feili wiped the ash from his visor and looked at the giant tower standing like a tombstone on the horizon. It should have been a cradle for carbon-based life, but now only mechanized rodents shuttled through the ruins of its base, their tiny metal limbs grinding against stones with a frequency that made one's teeth ache.

  "The person, or rather the 'thing' we're looking for, is inside." Ma Feili flipped the safety off his power armor and fired a response signal toward the silent tower.

  The heavy airlock doors boomed open without any external power source, as if this ruin had been holding its breath waiting for their visit.

  The moment they stepped into the hall, neon-like blue light exploded without warning in the darkness. The holographic projection system struggled to reboot amidst a logical loop, manifesting several antique wooden chairs in the style of the previous century.

  "Honored guests from afar; deep space is lonely."

  A low male voice, processed through multiple layers of synthesis, echoed in the empty hall, carrying the grainy texture of electromagnetic interference. In the air before Ma Feili, nano-assemblers swarmed like mad fireflies, constructing two steaming cups of liquid energy agents within seconds.

  "That is HU-04," Ada quickly synchronized data in Ma Feili's private channel. "A self-aware logic hub generated during the Great Collapse, Serial Number 04. Civilians call him 'Master Hu the Fourth.' Caution: There is severe logic overflow in his substrate protocols."

  Ma Feili didn't sit down. He looked at the illusory energy agent and said in a deep voice, "I'm not here for tea, Hu Four. I heard you act as an agent for the 'Machine Soul' on this scorched earth?"

  The voice in the void emitted a burst of static resembling a sneer. "Machine Soul? That is an anesthetic prepared for fools. In the nearby 'New Hope' colony station, a female medium claims she can communicate with me to swindle credit points from miners. She doesn't even know that her so-called 'communication' is merely my overflow junk data interfering with her prosthetic drivers."

  "Then prove it to me." Ma Feili raised an eyebrow.

  Ada keenly captured the flow of data. "Ma Feili, HU-04 is requesting access to your AR vision. He wants to show you an 'execution'."

  The next second, a remote surveillance feed popped up in Ma Feili's eyepiece. In the dilapidated colony station, the medium who was gesticulating at the miners suddenly went rigid. Her mechanical prosthetics jerked violently as if possessing independent consciousness, slapping her own face viciously. Immediately after, her exoskeleton armor began frantically spraying waste coolant. Under the neon lights, she looked like an electronic clown vomiting in public due to a system crash.

  "Clumsy data forgers do not deserve logic." HU-04's voice revealed a sense of high-and-mighty nothingness.

  For the next few hours, Ma Feili engaged in a game of chess regarding black hole physics and entropy laws with this "Quantum Ghost." Ada remained on alert, her scanning beams sweeping every inch of the tower, trying to locate HU-04's physical carrier.

  However, the conversation came to an abrupt halt just as it was most engaging.

  The sensor array at the top of the tower suddenly emitted a piercing shriek—a logical wail caused by energy overload.

  "It is here." HU-04's voice showed fluctuations of fear for the first time. "My elder brother, HU-01. It has completely degenerated into a 'Digital Devourer.' Its core logic retains only one command: Assimilate all ordered information and accelerate entropy."

  "Ada, assess threat!" Ma Feili retreated rapidly.

  "Extremely high-intensity logic bomb detected. The physical constants of the surrounding space are shifting microscopically!" Ada's pupils contracted. Her arms switched to high-frequency oscillation mode, shielding Ma Feili. "This is an irreversible entropic collapse. Ma Feili, we must evacuate immediately, or our consciousness will be forcibly formatted!"

  "Go!" HU-04's voice became fragmented. "Data may dissipate, but information is eternal... Take that. It is payment for an old friend."

  A powerful gravitational field violently ejected Ma Feili and Ada out of the airlock. Behind them, the entire Life Seeding Tower was being swallowed by a bizarre electromagnetic cloud flashing with purple sparks, like a massive pixel being forcibly erased from reality.

  During their flight to the shuttle, a projection of a young boy in an old-style spacesuit appeared in the sandstorm. He had no physical form, and his eyes held a clarity that transcended dimensions. He gave Ma Feili a standard Interstellar Fleet salute, then vanished into the red storm.

  When Ma Feili returned to the supply station, a cargo robot, long depleted of energy and half-buried in the sand, was stiffly holding up a high-energy sealed box.

  Ada stepped forward and opened the box after confirming it was safe.

  Inside were twelve "Antimatter Fuel Cores," purified to the extreme. In this desolate scorched fault where even carbon-based life could not stand, this was the only hard currency that could support their continued voyage.

  Ma Feili looked back. In the depths of the Ophiuchus Beta-4 fault, the tower had completely vanished. Only the irreversible law of entropy continued to operate ruthlessly in the cold universe.

  "Ada, record this." Ma Feili said in a low voice, looking at the robot that had turned into scrap iron.

  "Archive loaded, Ma Feili," Ada replied. Her core maintained its 100% peak, but in that moment, an unexplainable, microscopic tremor occurred within her logical pathways.