Senior Sister Lan didn't receive visitors in the afternoon.
Afternoons were for quiet meetings, for private lessons, for punishments that didn't need witnesses. If you arrived then, you either had permission or you were meat.
Lin Wuchen arrived near dusk.
He carried Auntie He's sealed vial in a small cloth sleeve, held flat against his palm so it wouldn't warm too much. The pale wax seal still held the apothecary thumbprint cleanly. That mark was the real shield. Without it, the vial was just suspicion.
At Lan's gate, the guards' eyes flicked to Wuchen's cuff.
The jade token showed.
They stepped aside without being asked.
Luo Ping stood at the courtyard entrance again, scar visible, expression blank. His gaze drifted to Wuchen's hands, then to the cloth sleeve.
"What," Luo Ping said.
Wuchen bowed. "Apothecary tonic," he said quietly. "A gift. For Senior Sister Lan."
Luo Ping didn't take it immediately. He looked at the wax seal. He recognized Auntie He's thumbprint the way men recognized danger.
He took the vial with two fingers and lifted it to his nose.
He didn't sniff deeply.
Just enough.
Then he looked at Wuchen. "Wait," he said.
Wuchen waited three steps back, hands folded, breathing stacked.
Minutes passed.
Lan arrived without sound, like she'd stepped out of the bamboo itself. She wore a pale robe again, silver comb in her hair. Her eyes went straight to the vial in Luo Ping's hand.
"Auntie He's wax," Lan said softly.
Luo Ping bowed and held it out.
Lan took it, turned it under lantern light, and studied the thumbprint. Then she smiled faintly.
"Gu Yan sends medicine now," she murmured.
Wuchen bowed. "Auntie He prepared it," he said, careful to emphasize the apothecary, not Gu Yan.
Lan's gaze slid to Wuchen's face. "And you carried it," she said. "So you are part of the medicine too."
Wuchen didn't answer.
Lan didn't break the seal.
She handed the vial back to Luo Ping. "Drink," she said.
Luo Ping's expression didn't change, but the muscle at his jaw tightened for half a heartbeat.
"Yes," he said.
Wuchen kept his face dull, but his stomach tightened hard.
So Auntie He was right.
Lan wouldn't drink first.
Luo Ping broke the wax seal cleanly with the edge of his thumbnail. He didn't smell again. He lifted the vial and swallowed in two controlled gulps, as if refusing to savor.
He didn't cough.
He didn't flinch.
For a breath, nothing happened.
Then his throat moved, and his fingers flexed slightly, like someone testing whether a hand was still a hand.
Lan watched him closely. "Any bitterness?" she asked.
Luo Ping's eyes narrowed slightly, as if listening to his own body. "Mild," he said. "Warm in the chest."
Lan's smile didn't change. "And?" she prompted.
Luo Ping's jaw tightened. "Breath… smoother," he said after a pause.
Lan's eyes brightened with interest. "How long?" she asked.
Luo Ping's gaze flicked to Wuchen for a heartbeat, then back to Lan. "Hard to tell," he said. "It sits light. Not like a heavy pill."
Lan nodded slowly, pleased. She took the empty vial back and turned it in her fingers. Then she looked at Wuchen again.
"Tell Gu Yan," Lan said softly, "his apothecary has good hands."
Wuchen bowed. "Yes."
Lan's smile sharpened. "Also tell him," she added, "I don't like being fed without seeing the cook."
Wuchen's throat tightened.
This was Lan's real message.
She wasn't talking about Auntie He.
She was talking about Gu Yan.
Lan stepped closer, close enough that Wuchen could smell her perfume again. "You're leaking," she said quietly.
Wuchen obeyed the script. "Yes."
Lan's eyes stayed on him. "Then come back tomorrow night," she murmured. "I'll give you something that seals better than cheap fragments."
Wuchen's stomach tightened.
A gift. An obligation. A new mark.
Lan stepped back and smiled politely, voice returning to normal volume. "Go," she said. "And don't let Gu Yan blame you for my dog's tongue."
Wuchen bowed and backed away.
Luo Ping stood still, expression blank, but Wuchen saw his fingers flex again as if testing air. His breathing looked too smooth for someone who had just swallowed an unknown tonic.
The first sip had been taken.
Not by Lan.
By her lungs.
And if Auntie He's warning was true, then one sip wasn't the danger.
The danger was that the second sip would feel like relief.
The third would feel like need.
Wuchen left Lan's courtyard and walked back down toward Gu Yan with the empty cloth sleeve in his hand and a cold tightness in his chest.
He had delivered "comfort."
Now he had to report which dog drank first.
And he had to pretend he didn't understand that he was watching the birth of a craving.