The pulse stone rested on a folded cloth in the testing room. Its surface had a pale groove across the center and a copper ring around the edge. Attendant Wu checked its calibration against a known sample before asking Yan to sit.
“Place two fingers here,” Wu said. “Keep your other hand on the table.”
Yan did. A narrow line of blue light appeared under his fingertips. It ran from the center groove toward the copper ring, then stopped before reaching the edge.
Zhao leaned closer. “The channels look as if you recovered from a serious internal injury.”
Yan lifted his fingers. The light disappeared. “There is no such injury in my record.”
“Exactly.” Zhao asked Wu to repeat the reading.
Wu adjusted the stone and checked its weight. “The calibration is steady.”
“Is it measuring my qi or my pulse?” Yan asked.
“Circulation stability and recent strain,” Wu said. “It is not an exact map of every channel.”
Zhao asked him to place his fingers down again. The blue line appeared in the same narrow pattern.
“You have been cultivating only a short time,” Zhao said. “Did the first draught change your channels?”
Yan remembered the first awakening: the initial pain before everything turned clear and smooth. Later, when Zhao had asked, Yan had claimed the whole dose hurt. He had kept that lie because the true change was his to understand.
“I reported pain during the first test,” he said. “The pulse later settled.”
“That is not the same as answering whether the channels changed.”
“No.” Yan kept his fingers on the stone. “I don’t know what caused this reading.”
“Did you feel anything after the second dose?”
“Warmth and smooth movement.” He decided not to say how much he enjoyed it. “There was no lasting pain.”
Zhao looked at the light. “Wu, compare this with the earlier strips.”
The attendant unfolded two records. “The first reading was uneven before the draught. The line settled afterward. The second dose also followed a stable reading.”
Wu placed a blank strip beside the old records. “I’ll make today’s reading on a new surface. The stone can be affected by temperature, so I’m checking the room reading too.” He set a shallow metal cup of water beside the instrument. The needle on the cup’s rim rested still.
Yan sat with both feet on the floor. Wu asked him to relax his fingers, then placed a mark on the paper for the time. The line of light ran the same narrow route as before. Zhao asked him to breathe once through the nose and once through the mouth. The stone’s glow wavered with the breath, but the blue line returned to its original shape.
“Does the pattern change when I move?” Yan asked.
“Only while the qi is changing,” Wu said. “The stable line returns when you stop.”
Zhao asked him to stand and walk to the door, then come back. Yan did so at an ordinary pace. The stone showed a brighter edge while his qi moved, then settled again when he sat. It measured a response, not a hidden injury.
“Was there any grey sediment in the second cup?” Yan asked.
“No,” Zhao said. “It was a fresh mixture.”
“So that doesn’t explain the first pattern.”
“It might not. The first batch card and the cup are sealed.” Zhao turned toward Wu. “Request the original from storage. Include the jar number and all surviving ingredient notes.”
Wu wrote the request on a slip. “The inventory may not have the source.”
“Then record that it is missing.”
Yan watched the attendant write. “Do you know where the grey material came from?”
“The confiscation inventory says old alchemical sediment,” Zhao said. “It gives no maker, owner, or reason it was kept.”
“That still doesn’t tell us what it was.”
“No.” Zhao’s answer was sharper than before. “The record is incomplete.”
Wu lifted the request slip. “Should the inventory clerk look for the jar’s storage history as well as its source?”
“Ask for both,” Zhao said. “The jar number may connect it to an older entry.”
Yan said, “And if the ledger has no earlier owner?”
“Then the report will say the owner is unknown.” Zhao’s tone made clear he disliked that answer, but he did not replace it with a guess. “The sample stays sealed until we know what record it belongs to.”
Wu copied the jar number from the card and checked it against the cabinet index. The numbers matched, but the index had no date before the confiscation entry. He wrote “source not listed” on a duplicate request and kept the original card untouched.
Wu finished the request and placed it beside the two pulse strips. “These readings show the same stable pattern after each examination.”
He checked the times, then laid the strips side by side. The lines matched closely. Wu marked the comparison for the examination file and asked Zhao whether it should be sealed with the records.
“Yes. Seal the readings together. Keep the first cup request separate until the cabinet returns it.”
The distinction mattered to Yan. “What does the stone prove?”
“That your circulation is stable today,” Zhao said. “It does not prove how you reached that state.”
“Then we agree.”
Zhao looked at him for a long moment. “You have a talent for giving limited answers.”
“I only know a limited amount.”
Wu sealed the pulse slips in a paper sleeve and dated the flap. Zhao told him to log every person who handled it. The testing office had now created a record of a real change and a gap where its cause should have been.
“Do you want the first sample’s seal checked against the cabinet key?” Wu asked.
“Not until the cup is brought here,” Zhao said. “I want the inventory clerk present when it is opened.”
Yan looked from the sealed pulse slips to the request. “You’re keeping the sample separate from the readings.”
“They are different records.” Zhao tapped the card number, not the cup. “One tells us what was mixed. The others tell us how you responded. If we combine them too early, we may confuse sequence with cause.”
Wu added a second sheet to the sleeve, listing the stone calibration and the time of each reading. He wrote that the pulse pattern had repeated, not what it meant. Then he asked Yan to initial the statement as the subject of the examination. Yan read it before signing. The line said “stable circulation following three observations”; it did not say “recovered from injury.”
“Keep the earlier wording on Zhao’s first note,” Yan said. “If it is wrong, the correction should be visible.”
Zhao studied him, then nodded to Wu. “Attach a correction. Do not erase the first reading.”
Wu copied the phrase and placed the sheet behind the original. The file now showed both the first impression and the later, narrower conclusion. Yan preferred that to a clean page pretending nobody had guessed.
“You may go,” Zhao said. “Return if delayed pain appears.”
“I will.”
Outside, Yan flexed his fingers. His Meridian Opening channels carried qi smoothly. The stone had measured something real, though it could not explain why. He walked back toward the library annex with the warmth of his own circulation beneath his skin and no need to pretend he feared the answer.