The cough tore from Pei Xingjiao’s lungs, a raw, grating sound that clawed at her throat. It was a familiar symphony in the Yancang Valley, played by every unfortunate soul condemned to this industrial tomb. The air itself was a living thing, thick and viscous, tasting of iron and sulfur, coating the inside of her mouth with a fine grit. Dawn broke not with light, but with a thicker shroud of orange-tinged smog, burning her eyes even through their narrowed slits. Around her, the hovel of packed mud and warped timber groaned under the collective misery. Figures stirred, each movement punctuated by hacking coughs. Old Auntie Maizhi, once a renowned calligrapher for the Imperial Archives, now trembled constantly, her hands refusing to obey. Her daughter, little Juyan, no older than twelve, plucked aimlessly at the thin blanket, her eyes vacant, a faint tremor running through her small frame. Their plight was universally attributed to the ‘Crimson Veil Curse,’ the vengeful spirits of the earth angered by the constant digging for cinnabar ore. Xingjiao knew better. The tremors, the cognitive degradation, the widespread respiratory distress, the tell-tale discoloration of the skin—a faint, almost imperceptible grey sheen—it was all textbook. Acute mercury poisoning, chronic exposure. The Jiuli Empire’s grand delusion of divine cultivation through alchemical pills was nothing more than slow, agonizing self-annihilation. Her own bloodline, the disgraced Pei clan, had suffered the same fate for generations, though their banishment to this hellhole accelerated the process. She pushed herself up, her muscles protesting. Her own lungs burned, a constant, dull ache that reminded her of the chemical spill that had ended her previous life. A quick calculation: her current body, weakened and barely recovered from a childhood of malnutrition, had perhaps a few months, at most a year, without intervention. She needed a solution, not just for herself, but for her control group. The Pei clan members, as she coldly categorized them, would serve perfectly. Her eyes scanned the hovel’s damp floor, then the desolate landscape outside. Charred remnants of wood from a collapsed smelting kiln, and the greyish-white fragments of calcified bone, likely from a labor beast, littered the ground. Crude, but effective. She began to gather them, ignoring the bewildered stares of her kinsfolk. “We need fire,” she rasped, her voice thin but firm. “Hot enough to turn this to ash. For the air, for the water.” Elder Pei Sulan, a man whose once-sharp mind was now a cloudy swamp, frowned. “What madness is this, Xingjiao? The curse… it cannot be burned away.” “It can be filtered,” she corrected, already arranging the bone fragments. “This valley holds death in every breath. If we don’t clean it, we become its offering.” She supervised the digging of a crude pit, then carefully arranged the salvaged materials. Hours later, through the stifling smog and the intermittent coughs, a new, acrid smell joined the cacophony – the pyrolysis of bone and wood, yielding dense, porous charcoal. She would grind it, pack it into woven grass sacks, and use it to filter their drinking water and fashion rudimentary respirators. A primitive but crucial first step. Just as the first batch of charcoal cooled, a blaring horn ripped through the haze. Three lumbering figures emerged from the smog, their heavy leather coats and iron cudgels marking them as the Overseers of the Crimson Pit. At their head was Foreman Dagang, a man whose face was a map of old scars and permanent scowl. “Listen, worms!” his voice boomed, cutting through the general coughing. “The Imperial Edict has arrived! The Emperor’s own apothecaries demand a new elixir. For that, we need more cinnabar. Your quota has doubled! Fail, and the pits will claim more than your breath!” A collective gasp, quickly smothered by renewed coughing, rippled through the laborers. Doubled. That was a death sentence, even by Yancang’s standards. Dagang grinned, a cruel flash of yellow teeth, clearly enjoying their despair. Before he could continue his tirade, another, more insistent horn sounded. This one was deeper, resonating with a terrifying authority that silenced even the pit drivers. A phalanx of black-clad sentries, their armor gleaming dully through the smog, marched into view, flanking a palanquin draped in dark silk. At its front strode a man whose presence seemed to suck the very air from the valley. Gongsun Tielin, the Imperial Viceroy, known across the realm as the ‘Demon-Possessed.’ Even Dagang stiffened, his swagger evaporating. Gongsun Tielin dismounted from the palanquin with a jerky, erratic lurch. His eyes, sunken and bloodshot, darted ceaselessly, scanning the landscape, his escort, the terrified laborers. His lips were thin, pulled back in a perpetual sneer, revealing gums that were an unnatural, bruised black. A sudden, spasming tremor seized his left arm, shaking his entire frame. Without a word, his hand shot out, grabbing the foreman by the collar. “You… you’re hiding something,” Gongsun hissed, his voice a low, guttural growl, utterly devoid of reason. “Traitors. All of you.” With a single, brutal twist, the foreman's neck snapped. The dead man crumpled into the mud. No one moved. No one dared. The magistrate's paranoia was legendary, his rages sudden and fatal. Xingjiao watched, her mind working furiously. The blackened gums, the severe tremors, the extreme paranoia, the sudden manic outbursts, the cognitive disinhibition. Not a demon. Late-stage heavy metal neurotoxicity. The highest echelons of the Jiuli Empire were rotting from the inside, their grand pursuit of immortality a horrific suicide pact. This man was merely one of the most advanced cases. Gongsun Tielin’s eyes, wild and unfocused, swept over the assembly, landing for a terrifying moment on Xingjiao. She met his gaze, not with fear, but with the detached interest of a biologist observing a particularly fascinating specimen. Her heart did not race. Her hands did not tremble. Here was her opening: the dynasty's most feared official, suffering from a perfectly treatable, albeit advanced, condition. He began to babble, incoherently accusing his own retinue of poisoning him, his body wracked with another spasm that sent him stumbling. He clawed at his throat, his face contorting in a paroxysm of pure, unadulterated madness, before collapsing to the ground in a fit of manic convulsions. The armored soldiers stood frozen, feet rooted to the mud, too terrified to approach their lord. But Xingjiao saw only a patient. Her first, and most crucial, patient. As the dust settled and the commander twitched on the ground, she bypassed the cowering soldiers with calm, measured steps. She knelt beside Gongsun Tielin, the thick smog swirling around her, and in a voice clear and steady amidst the terrified silence, offered, “Esteemed Viceroy, perhaps what you need is not a guard, but a proper spiritual cleansing.”

The Smog and the Specimen