The first week in Elder Zhu Yan's lower annex was a study in controlled agony.
Lin Feng's new quarters were a small, windowless storeroom adjacent to the main archive. It held a thin pallet, a wash basin, a chamber pot, and a single, flickering spirit-lamp that cast long shadows. It was austere, clean, and a thousand times better than the Stagnant Ravine. It was also a cage.
His body remained a prison. The high-grade analgesic Elder Zhu had given him wore off after a day, leaving him with the deep, grinding pain of a ruined dantian. Meridians that should have been rivers of spiritual energy were now clogged, cracked culverts. Even the simple act of walking to the privy was an ordeal that left him sweating and breathless.
His task, however, was his salvation.
Each morning, a silent servant—a wooden automaton powered by a simple spirit stone—would deliver a tray of bland, spirit-nourishing congee and a stack of jade slips. These were the "failed batch logs" from Elder Zhu's personal refining sessions over the past thirteen months.
The logs were not simple notes. They were immersive spiritual recordings. Placing a slip against his forehead, Lin Feng was plunged into the Elder's own sensory experience: the precise visual of the ingredients, the tactile feedback of the spiritual flames, the subtle shifts in aromatic compounds, and the crushing disappointment as a batch destabilized, often culminating in a minor explosion of wasted resources and spiritual energy.
It was overwhelming. The original Lin Feng's memories provided a basic glossary of terms—Moonlight Grass, Scarlet Ginseng, Three-Yin Water—but the profound alchemical principles were a foreign language. Zhang Wei's modern mind, however, thrived on data. He began to treat each failure not as a mystical misstep, but as a system failure.
He couldn't feel Qi, but he could identify patterns of correlation. Batch #47 failed at the 'coagulation stage' when the ambient humidity in the chamber spiked. Batch #89 showed inconsistent heating in the 'North-West quadrant' of furnace #2, correlating with a faint vibration from a nearby formation that cycled every three hours. He scribbled his observations on scrap parchment with a charcoal stick, creating crude graphs and timelines.
This was where his new system ability, [Passive Scan - Material Analysis], became his lifeline. When his eyes grew blurry from the jade slips, he would focus on the physical components around him.
He picked up a piece of charcoal from his hearth. A faint, transparent overlay appeared in his vision.
[Material: Singed Pine Charcoal.]
[Spiritual Grade: Mortal.]
[Common Uses: Low-grade fuel, filtration medium, pigment.]
[Notable Property: Retains faint wood-attribute essence; inefficient for high-heat processes.]
He focused on the stone of his washbasin.
[Material: Grey Basin-Stone.]
[Spiritual Grade: Mortal.]
[Common Uses: Construction, water containment.]
[Notable Property: Porous; retains residual spiritual signatures of liquids held for long periods.]
It was rudimentary, but it trained his mind to see the world through the system's lens—as a set of components with properties and uses. He started applying it to the descriptions in the logs. When a log mentioned "Granulated Sky-Iron Sand," he now had a flicker of understanding of its conductive and reinforcing properties.
Five days in, the servant automaton delivered a new item with his congee: a small, palm-sized disc of dull, silvery metal.
[Material: Reflective Cold Iron (Crude Alloy).]
[Spiritual Grade: Low-Earth.]
[Common Uses: Qi-dampening, low-grade spiritual shielding.]
[Notable Property: Non-reactive to most elemental Qi; reflects and diffuses concentrated energy flows.]
It was the material he had suggested for the baffle. There was no note. It was a test.
Lin Feng spent the next two days ignoring the logs. He asked the automaton, via clumsy gestures, for a basic toolkit. He was given a set of worn engraving chisels and a mallet. His body screamed in protest at the precise work, but he persisted. Using the system's scan to check the metal's stress points, he painstakingly carved the disc into a curved, fin-like shape, its surface roughened on one side to diffuse, smooth on the other to deflect.
On the eighth day, Elder Zhu Yan entered his storeroom without announcement.
Lin Feng, hunched over his worktable, flinched and tried to stand, but a wave of dizziness forced him back onto his stool. He settled for a bow of his head. "Elder."
She ignored him, her eyes sweeping the room—the neat stacks of jade slips, the chaotic spread of his parchment notes covered in strange, angular symbols and diagrams, and the cold iron baffle, now finished, sitting next to his congee bowl. Her gaze lingered on the notes the longest, a flicker of profound confusion in her usually composed eyes.
"Report," she said, her tone flat.
Lin Feng took a breath. "Of the one hundred and fourteen logged failures in the past thirteen months, sixty-two showed clear environmental correlation. Thirty-seven suggest inconsistent material quality from the Sect's provisioning hall, specifically in batch variations of Crimson Root. The remaining fifteen… this disciple lacks the foundational knowledge to diagnose."
He pushed a specific parchment toward her. It showed a simple wave-form diagram next to a charcoal sketch of Furnace #2. "This one is the most pressing. Furnace #2 has a resonant vibration that aligns with the Sect's central defensive formation pulse. It's causing a microscopic fluctuation in heat every third hour. It's small, but it's enough to destabilize the final 'Spirit-Locking' stage in high-purity elixirs."
Elder Zhu picked up the parchment. She studied it for a long, silent minute. The symbols meant nothing to her, but the correlation was noted in clear, logical script next to timestamps from the logs. The evidence was irrefutable.
"These markings," she finally said, tapping the wave-form. "What is this?"
"It is a way of… picturing a pattern," Lin Feng said carefully. "A vibration. A cycle. It helps to see it, not just feel it."
She looked from the parchment to his face, then to the cold iron baffle. "And this?"
"A prototype. For the third vent, as discussed. The rough side faces the incoming flame to break it into turbulent streams. The smooth side directs the flow evenly. It should… it should shear the heat as hypothesized."
She picked up the baffle. Her spiritual sense washed over it, and Lin Feng felt a tingling in the air. She gave a minute nod. "Crude. But the intent is sound." She set it down. "The vibration in Furnace #2. How would you address it?"
This was another leap. He had identified the problem. The solution… "Isolate the furnace's foundation," he said, thinking of vibration dampeners. "Use a mat of… of a soft, energy-absorbing material. Spirit-Silkworm padding, perhaps. Or re-time the critical refinements to avoid the third-hour pulse entirely."
Elder Zhu placed the parchment back on the table. She looked at him, not as a piece of refuse, not as a puzzle, but as a… tool. A strange, broken, but unexpectedly precise tool.
"You have no spiritual sense," she stated. "You cannot feel the Qi flows you describe. Yet you deduce them from secondary effects. This is not talent. This is… a peculiar form of madness." A pause. "A useful madness."
She gestured to the servant automaton, which had been standing motionless in the corner. "From today, you will be given a basic body-strengthening broth with your meals. It will not heal your dantian, but it will fortify your flesh and blood so you do not collapse from a stiff breeze. You will continue your review. You will also begin cataloging the material samples in the lower vault. I want your 'observations' on their physical properties. In writing."
It was a promotion. From a passive observer to an active assistant. A vault cataloger was a position of minor, but real, trust.
[Target: Zhu Yan - Interest Level: 18%.]
[Stage 2 (Construction) Sub-Objective Updated:]
[Secure a permanent role: ACHIEVED (Vault Aide).]
[New Sub-Objective: Demonstrate Consistent Value. Increase Trust Metric.]
"This disciple is grateful for the Elder's instruction," Lin Feng said, the formulaic words feeling more genuine than they ever had.
"Do not be grateful," she said, turning to leave. "Be useful. The baffle will be tested tomorrow. If it fails, you will have wasted valuable Cold Iron." At the door, she paused without looking back. "The congee is fortified with Soothing-Bone Grass. Eat it all."
The door closed softly behind her.
Lin Feng slumped in his chair, exhaustion and triumph warring within him. He had done it. He was no longer an experiment; he was an asset. A small, fragile asset, but an asset nonetheless.
He looked at the system notification glowing softly in his vision. Interest Level: 18%. It wasn't affection. It wasn't attraction. It was the interest a master craftswoman has in a unique, effective new chisel.
It was a start. It was everything.
He picked up his charcoal and turned to a fresh sheet of parchment. The vault catalog awaited. He had value to demonstrate.
Outside, in the main alchemy chamber, Elder Zhu Yan stood before the majestic Number Three furnace. In her hand, she held the crude, cold iron baffle. A faint, almost imperceptible line appeared between her brows.
'A way of picturing a pattern…' she thought. He sees the world backwards. He starts with the cracks and infers the whole. How very strange.
She inserted the baffle into the third vent assembly. It fit. She ignited the Verdant Emperor flame. The familiar roar of the fire changed subtly, becoming a more even, distributed hum.
A ghost of something—not a smile, but the distant cousin of one—touched her lips for a fraction of a second before vanishing.
Perhaps the tool would not be wasted after all.