Bai arrived at the quarantine shelf with the blank jar wrapped inside a second cloth. He had not brought it into Yan’s room or set it beside the labeled stock. Clerk Tao waited at the guild desk with an inventory slate and a brass key.
“I asked three couriers where it came from,” Bai said. “One says the north clinic. One says a traveling seller. The third swears he saw it in a storeroom box, but he can’t name which one.”
Tao unwrapped the jar without lifting it. Its lid had no mark, only a dull ring where a seal might once have been. “This glass is an old guild container. We used these for powders, not pills. That tells me where the jar was made, not what is inside.”
“Can you identify the powder?” Yan asked.
“No batch number, no label, and no transfer entry. I won’t open it.” Tao checked the cloth for a hidden tag. “The quarantine shelf is full. If I place it there, I’ll have to move something else.”
Bai touched the route book at his belt. “I can exchange it for two labeled rejects from this same route. They have intact seals and source tags. You take the unknown jar and give me the two packets. I’ll keep their tags attached and won’t resell the powder.”
Tao looked at the shelf, then at the jar. “You want to lose the chance of selling it.”
“I want to keep my courier permit.”
“And you want the labeled stock.”
“I want stock I can trace.”
Tao let the silence sit for a breath, then pointed to two packets on the end of the desk. “These came from a returned lot. The labels are complete. You take the tags, and you keep the unknown jar out of your sale book.”
Bai turned the first packet to check that its ingredients and batch mark had not been torn away. The second carried a warning in a different hand, but the source line was stamped and legible. He asked Tao whether the return date belonged to the original lot or to the damaged packet itself.
“The return date is for this packet,” Tao said. “The original lot date is on the smaller seal. You need both if you want to trace a complaint.” He showed Bai the matching entry on the slate.
Bai copied both dates into his route book. “If I take the jar and one packet proves mislabeled, the record still stays here?”
“The inventory book does. Your copy travels with the packet.” Tao tapped the slate. “I will not let you move the original entry.”
“Good. I want a copy, not a chance to rewrite your books.”
Tao gave him a dry look. “Then we understand each other.”
Bai agreed. Tao wrote a temporary quarantine number on a strip of paper and tied it around the jar. He placed the wrapped container on the shelf, turned the key, and entered the exchange in his ledger. Bai received the two packets with their source tags and logged them as courier stock, not inventory purchased for resale.
Yan read both labels before choosing. One promised a modest qi gain and listed uneven heat through the arms. The other had a different warning and an instruction slip with small print. He would not combine them. He paid Bai the agreed courier charge and selected the first for a separate test after his shift.
“Are you sure?” Bai asked. “The warning sounds uncomfortable.”
“It’s a listed cultivation effect, and the batch is traceable. I’ll take the measured dose and stop if anything outside the label appears.”
Tao kept the second pill in a clean drawer while Bai wrapped the chosen packet in its tag. “Don’t let the unknown jar make you careless with the known ones.”
Yan tucked the packet into the inner pocket of his coat. “I won’t.”
After his work, he returned to the room where he kept his notes. The hand he had cut on the slab had closed; he could now bend his fingers without pulling at the edges. He checked the batch mark, the listed ingredients, and the prescribed dose. Then he swallowed the pill with water and sat beside the open window.
Qi settled in his dantian. The uneven heat began to gather in his forearms, warm on one side and faint on the other. He kept his hands resting on his knees and watched the sensation change. The heat evened out. A smooth current moved from wrist to elbow and back, without the lopsided pulse described on the label. Yan rolled his shoulders and smiled at how easily the qi passed through his arms.
The silent notice retained the modest qi benefit and reversed the cultivation-linked heat imbalance into smoother circulation. There was no lingering weakness. Yan recorded the time and sensation without adding a claim about how it would affect someone else.
Bai stopped by when the sun reached the lane. “Did the batch behave?”
“The qi benefit stayed. The heat evened out, then moved smoothly through both arms.”
“Any dizziness?”
“No.”
“Would you buy another?”
“If the source stays the same and the price is fair.” Yan showed him the tag and the dose record. “I’d still test it separately from the other packet.”
“That’s why I brought two.”
Bai pointed toward the sealed second packet. “Should we hold it for tomorrow?”
“Yes. Different warning, different entry. I don’t want to mistake one result for two.”
They walked together to the quarantine shelf to check that Tao had tied the new tag properly. The glass jar remained in the second cloth, locked behind the shelf door. Bai had not tried to sell it, and Tao had made no guess about its contents. The exchange had cost them the chance of a quick sale but given Bai two traceable products for later consideration.
Tao tested the shelf lock twice before leaving the desk. “The inventory search starts with the old glass containers. If the number turns up, I’ll add the source to the hold record. If it doesn’t, it remains unknown.”
“Can I ask again tomorrow?” Bai asked.
“You can ask. I can’t promise the search will be done.”
“Then I’ll check at the end of the week.” Bai wrote the day into his route book, beneath the hold number. “No point sending a runner here every morning.”
Tao nodded. Yan liked that the clerk had given them a time to return instead of a guess about the powder. He noted the same hold number on the receipt, then sealed the tested pill wrapper in its own sleeve. The next labeled packet remained untouched until he could read it separately.
“Maybe the powder is valuable,” Bai said as they left the desk.
“Maybe.” Yan adjusted his sleeve. “But it is not worth pretending we know what it does.”
Bai tapped his route book. “Tao gave me the tag number. I can ask again after the inventory search.”
“Keep that number with the jar entry.”
“I already wrote it down.”
At the gate, Bai handed Yan the receipt for the pill and copied the temporary hold number onto his own page. He would come back when the inventory office had searched its old entries. Until then, the powder remained locked away, and the second labeled pill stayed sealed. Yan kept the tested wrapper in a separate sleeve from his technique notes and walked home with the arm warmth fading evenly into his usual circulation.