Lan's test arrived before noon.
Not with a messenger in Lan's colors, and not with Luo Ping's silent stare.
It arrived the way inner hall traps always arrived.
Quietly.
As if it had always been waiting in the corner for you to turn your head.
Wuchen was sweeping Gu Yan's courtyard stones when Wei appeared at the gate and called his name once.
No emotion.
Just a summons.
Gu Yan sat in the pavilion with tea this time, not a brush. A small wooden tray lay beside him, empty except for a folded strip of pale paper and a silver needle used for sealing wax.
Gu Yan didn't look up right away. "Lan sent a gift," he said softly.
Wuchen knelt. "Yes."
Gu Yan tapped the pale paper with one finger. "She says it's for you," he murmured.
Wei stood behind Wuchen, silent.
Gu Yan unfolded the paper slowly and held it so Wuchen could see without touching.
A simple notice, written in clean hand.
A library summons.
Not the main inner library. A side archive room under Lan's authority, stamped with her courtyard mark.
Reason: verification of handling a restricted fragment.
Wuchen's throat tightened.
Lan had watched him at the library.
Now she was pulling that thread.
Gu Yan's voice stayed mild. "She wants to know why you signed the ledger," he said.
Wuchen swallowed. "I signed with the runner tag."
Gu Yan smiled faintly. "Exactly," he said. "Which means she can't accuse you of stealing as a person."
He lifted his eyes to Wuchen. "So she will accuse you of stealing as a tool."
Wuchen kept his gaze down.
Gu Yan continued, "Lan doesn't care about the fragment," he said. "She cares about who is feeding you."
Wuchen's fingers curled inside his sleeves.
Gu Yan set the paper down and leaned back, as relaxed as if discussing weather. "You'll go," he said.
Wuchen's chest tightened. "Alone?"
Gu Yan smiled. "Of course," he said. "If Wei goes, it becomes Gu Yan versus Lan. That's noisy. If you go, it becomes a runner being questioned. That's clean."
Wuchen bowed. "What do I say?"
Gu Yan's eyes brightened. "You tell the truth," he said softly.
Wuchen froze for half a breath.
Gu Yan chuckled. "A narrow truth," he corrected. "You tell her you returned the fragment because you couldn't hold the method. You tell her you're leaking. You tell her you're useless unless someone pours."
Wuchen swallowed. "She will ask who pours."
Gu Yan smiled, polite and cold. "And you will look confused," he said. "Because you're trash. Trash doesn't understand who feeds it."
Wei's voice came quietly from behind. "If you understand too much, you die."
Wuchen bowed. "Yes."
Gu Yan picked up the silver needle and rolled it between his fingers, watching the light catch the point. "Lan will try to mark you," he said softly. "Not with scent resin. With obligation."
Wuchen's stomach tightened. "Obligation?"
Gu Yan nodded. "She'll offer you something," he said. "A pill. A method. A robe. A way to 'help' your leaking. If you take it, you're hers too."
Wuchen's throat went dry. "Then I refuse."
Gu Yan's smile sharpened. "If you refuse too cleanly, you offend her," he said. "So you don't refuse."
He tapped the silver needle once on the tray. "You trade," he murmured.
Wuchen's eyes flicked up for a heartbeat.
Gu Yan's voice stayed gentle. "If she offers a gift, you accept with gratitude," he said. "Then you return a different gift."
Wuchen swallowed. "What gift?"
Gu Yan reached into his sleeve and placed a tiny sealed vial on the tray.
Clear glass. A single drop of pale liquid inside, thick as honey.
Wuchen smelled it even from a distance.
Sweet.
Rotten-sweet.
Scent resin, refined.
Gu Yan's eyes stayed bright. "A perfume," he said softly. "Lan likes scented things."
Wuchen's stomach dropped.
Gu Yan continued, "You will give it to her as thanks," he said. "You will say Auntie He insisted, because your body stinks of smoke. You will act embarrassed."
Wuchen's throat tightened. "And then?"
Gu Yan smiled. "Then Lan will decide whether to use it," he murmured. "If she uses it, I learn something. If she tests it, I learn something else."
Wuchen understood.
This wasn't a gift.
It was bait.
It might mark Lan the way Shen Lu marked Team Twelve.
Or it might simply tell Gu Yan how cautious Lan was.
Either way, Wuchen's hands would be the ones to place it in her world.
Gu Yan slid the vial toward Wuchen. "Don't spill it," he said softly. "One drop is enough to ruin a day."
Wuchen picked it up carefully, feeling the glass cool against his palm. Two grains of qi sat in his belly, steady but small. A third grain warmed his palm memory.
Gu Yan's voice lowered. "Go now," he said. "And Wuchen…"
Wuchen paused.
Gu Yan smiled faintly. "Let her believe you're afraid of her," he murmured. "Fear is the easiest leash to borrow."
Wuchen bowed low. "Understood."
He left the courtyard with Lan's summons paper and the tiny vial hidden in his sleeve, walking up toward Lan's side archive as if he were walking into a clean room.
But he knew better.
Clean rooms were where poison spread best, because nobody saw it coming.
And today, he was carrying poison in a glass drop, wrapped in gratitude and embarrassment, straight into Lan's hands.