Wuchen returned to Gu Yan with Lan's paste still cooling on his wrist.
He didn't wipe it off. Wiping looked like fear. Keeping it looked like obedience.
Wei let him in without a word.
Gu Yan was in the pavilion with the lamp low, ruin slate covered, as if tonight's game was smaller than names. His eyes went straight to Wuchen's wrist.
"She touched you," Gu Yan said softly.
Wuchen bowed. "Yes. She applied her paste."
Gu Yan's smile sharpened faintly. "And my jar?"
Wuchen lowered his gaze. "I left it on her table. She didn't open it."
Wei's voice was flat. "She'll test it."
Gu Yan nodded once. "Or she'll pretend to," he murmured. "What did she say about the pass verification?"
Wuchen repeated Lan's answer exactly: Han stirring, patrol reacting, someone making them look dirty, and Lan asking if it was Wuchen.
Gu Yan's eyes brightened at that last part. "She suspects the runner," he murmured. "Good. That means she's looking at your hands, not my mouth."
He leaned forward slightly. "Did you leak ugly?" he asked.
Wuchen bowed. "Yes."
Gu Yan smiled faintly, satisfied. "Then she believes you're still hungry," he said. "Comfort hooks work best on starving mouths."
Wei added quietly, "And she'll keep feeding."
Gu Yan nodded. "Now we see what she does with the jar," he murmured.
He tapped the pavilion table once. "Tomorrow," Gu Yan said gently, "you will visit Lan's courtyard again."
Wuchen's stomach tightened. "To fetch the jar?"
Gu Yan smiled. "Not to fetch," he said. "To give her a reason to speak about it."
Wuchen swallowed. "What reason?"
Gu Yan slid a small strip of paper toward him.
Not a message.
A question written in ordinary hand.
Two characters only: Better?
Gu Yan's eyes were bright. "You will show her this," he murmured, "like a frightened boy asking if his medicine is working."
Wuchen understood.
If Lan had tested the neutral paste, she would answer in a way that revealed who she used to test.
If she hadn't tested, she would either lie or delay, and that delay would reveal her caution.
Either way, Gu Yan learned.
Gu Yan's voice lowered. "And Wuchen," he added, "if she tells you to come closer, you do."
Wuchen's throat tightened.
Gu Yan smiled faintly. "Hands again," he murmured. "We're still counting hands."
Wuchen bowed and backed out.
That night, he slept in short pieces, waking each time his wrist warmed under Lan's paste. It didn't itch. It didn't burn. It simply sat there, quiet.
Quiet things were the most dangerous in the inner hall.
By late morning, Wuchen walked back up to Lan's courtyard with the "Better?" strip hidden in his sleeve and his hands ready to tremble on command.
At the gate, the guards let him through when they saw the jade token edge.
Luo Ping escorted him to the study.
Lan sat at the low table again, lamp lit low, silver needle present like always.
Her eyes went straight to Wuchen's wrist.
"Still wearing it," she said softly.
Wuchen bowed. "This one didn't want to waste Senior Sister's help."
Lan's mouth curled faintly. "Show me," she said.
Wuchen extended his wrist.
Lan's thumb brushed lightly over the pulse point where her paste sat. Her touch was controlled. She was feeling for heat, for smoothness, for the tiny tremor that meant qi was leaking.
Wuchen let a small ugly leak happen, just enough to look helpless.
Lan watched it, then looked up. "Better?" she asked, echoing Gu Yan's planted word without knowing it.
Wuchen swallowed and pulled the small strip out, holding it with both hands like he couldn't form the question himself.
Lan's eyes flicked to the two characters.
A faint pause.
Then she smiled.
Not sharp this time.
Almost amused.
"So Gu Yan teaches you to ask," she murmured.
Wuchen's stomach tightened.
Lan reached to the side and picked up Gu Yan's neutral jar.
It was no longer sealed.
The pale wax had been cut cleanly and pressed back together in a seam so neat only someone watching for it would notice.
Lan held it under the lamp. "This paste," she said softly, "doesn't smell."
Wuchen kept his gaze down.
Lan continued, "Most things that come from apothecary smell," she murmured. "This one is too clean."
She tapped the jar lightly. "I tested it," she said.
Wuchen's throat tightened. "On…?"
Lan's smile sharpened again. "Not on Luo Ping," she said, as if answering the thought itself. "On someone whose skin I don't mind wasting."
Wuchen felt cold slide into his chest.
A servant.
A disposable body.
Lan leaned forward slightly. "It's not poison," she said softly. "It's a marker."
Wuchen's fingers went cold.
Lan's eyes brightened. "A very quiet marker," she murmured. "No scent, no itch, no burn. But it makes qi… settle toward the wrists."
Wuchen understood.
A paste that pulled qi into the hands would make a leaky boy leak more through fingers. It would make him look weaker than he was. It would also make his handprints carry a trace, a tiny signature that someone like Lan could track if she knew how.
Lan watched Wuchen's face. "Did you know?" she asked.
Wuchen bowed low, letting fear show in his shoulders. "No."
Lan smiled thinly. "Good," she murmured. "Then you're still useful."
She set the jar down and slid it back toward Wuchen. "Take it," she said. "Tell Gu Yan his paste is clever."
Wuchen's throat tightened. Taking it meant bringing the marker back to Gu Yan.
Also meant Gu Yan would know Lan opened it.
Gu Yan would know what Lan learned.
This was exactly what Gu Yan wanted.
Wuchen took the jar with both hands and bowed. "Yes."
Lan's voice lowered. "And Wuchen," she added softly, "if you ever want comfort that isn't a trap…"
She paused, letting the pause feel like perfume.
"…stop letting men hand you jars," she finished.
Wuchen bowed and left.
On the way down, the jar felt heavier than a box of tags.
Because now he knew:
Gu Yan's "neutral" gift wasn't neutral.
It was a marker that could make breath visible in a different direction.
A trap designed not to catch Lan, but to learn how Lan hunted.
And Lan had just told Wuchen the truth of it, not to save him, but to remind him she could see through cleverness too.
When Wuchen returned to Gu Yan and offered the unsealed jar, Gu Yan's eyes brightened immediately.
"She opened it," he murmured.
Wuchen bowed. "Yes. She said she tested it on a servant. She said it's a marker that makes qi settle toward wrists."
Gu Yan smiled faintly, satisfied. "Good," he said softly. "Then she understands just enough to be careful, and not enough to stop touching bait."
Wei's voice was flat. "And now she thinks she taught you something."
Gu Yan nodded. "Exactly," he murmured.
He looked at Wuchen's hands. "Wash," he said gently. "Not with soap. With ash. Scrub the wrist points."
Wuchen bowed. "Yes."
Gu Yan's smile sharpened. "Lan thinks comfort isn't a trap," he murmured. "So we'll show her what comfort really buys."
Wuchen left to scrub his wrists with ash, three grains held steady in his belly, and the cold realization settling deeper than any qi knot.
In this sect, even kindness came with instructions.