At dusk, Xu Jinghong went back to Ji'an Hall Pharmacy.
This time she wasn't there to watch who entered.
She was there for a sheet of paper.
Qin Zhao followed. At the threshold he finally murmured, "Are we really stealing the prescription record tonight?"
"We're not stealing medicine," Xu said. "We're stealing procedure."
Qin Zhao didn't understand.
Xu paused and made it plain:
"A prescription comes in two copies.""One goes to the patient—it travels with the medicine.""One stays at the counter—the root copy.""Who ordered it, how it was revised, when it was sent, which door it entered—those details can all end up on the root copy."
She glanced at Qin Zhao.
"What we lack isn't a name.""We have the name: Registrar Gu.""What we lack is this—when he leaves the desk, and which door he uses."
Now Qin Zhao understood.
Taking the root copy wasn't about what medicine he drank.It was about how the door opens for him.
The pharmacy still had lamps lit.
The shopkeeper sat behind the counter, working the abacus. The assistant from last night—the one with the callus at the thumb web—was sorting herbs fast, clearly practiced.
Xu didn't rush the counter.
She bought the cheapest possible item first—a packet of dried licorice slices—like a real customer hunting cough relief.
The shopkeeper looked up. "Buying this again?"
"My elder coughs at night," Xu said. "Better in the day, but at night he wheezes. Yesterday I heard you say old illness and new illness don't take the same formula."
The shopkeeper ignored the bait. "How long has he coughed?"
"Years," Xu answered. "Usually manageable. But one sleepless night, one burst of temper—and it flares."
Those lines weren't idle. She was deliberately echoing Registrar Gu's symptoms.
The shopkeeper's hand paused—just once.
He looked at Xu as if something had surfaced in his memory, then snorted and lowered his eyes again.
"That's not an ordinary cough. It's lung damage. You have to prop the breath.""No reckless tonics. No reckless leaks."
Xu nodded, then deliberately misstated one ingredient she'd memorized from yesterday—wrong on purpose.
"Is it fritillary, lily bulb, ginseng whiskers, and then pinellia?"
The shopkeeper snapped his head up. "Who told you to add pinellia? Night cough with weakness—pinellia's too drying. Take it blindly and you ruin a man."
He spoke too quickly—like someone who'd been stepped on.
Xu lowered her voice. "So I remembered wrong."
The shopkeeper's face stayed cold as he turned and pulled open the third drawer on the left.
From the doorway Qin Zhao saw it at once:
Not herbs.
A stack of folded sheets—the pharmacy's prescription root copies. Each was clipped with a thin tag showing a patient label and a date.
The shopkeeper drew one out, held it to the light, and muttered:
"Last night I wrote fritillary, lily bulb, ginseng whiskers—plus calming powder. Not pinellia."
He seemed to realize he'd said too much. He shoved the sheet back into the drawer immediately.
But it was already enough.
Left-side third drawer.Old cough formula.Calming powder added.
Qin Zhao memorized all three.
Outside the shop, Qin Zhao asked under his breath, "We go in tonight and take it?"
"We take it," Xu said. "But not now."
"When?"
"When the shop closes.""When the pharmacy is open, there are eyes everywhere. If one root copy disappears, they'll hunt it at dawn.""After closing, we can make it look like the shopkeeper misfiled it—like he confused his own stack."
She divided the operation cleanly:
"First: Chao Sheng and I enter from the back courtyard.""Second: you watch the street at the front. If anyone approaches, cough once.""Third: we take only Registrar Gu's sheet—touch nothing else."
Qin Zhao asked, "What if we can't tell which one is his?"
Xu answered steadily, "We can."
"How?"
"A man like that won't have a root copy that lists only herbs.""It will also list delivery method, timing, and prohibitions."
She added, quieter:
"When you serve a man like that, one mistake becomes blame."
Late at night, Ji'an Hall shut its doors.
The front boards dropped. In the back courtyard, the medicine stove hadn't fully died; embers glowed, staining a corner of wall dark red.
Chao Sheng went over the wall first—no sound. Xu followed, landing just as lightly.
Qin Zhao held the street corner, back to the wall. His eyes stayed on the front door, but his ears tracked the rhythm of feet in every direction.
He knew now what mattered wasn't whether they got in. It was whether a tail appeared.
The courtyard was small—one side for drying herbs, one for boiling. Beside the stove sat a small black jar—identical to the one that had gone through the black door last night.
Xu needed only one glance.
Registrar Gu's medicine really did leave from here.
They moved under the rear window. It wasn't latched tight; a narrow gap had been left for the herb-smell to vent.
Chao Sheng slid a thin blade into the seam and lifted gently. The window loosened.
They slipped inside. Underfoot were medicine chests and wooden boxes. The air was thick—sweet fritillary, bitter notes, the raw animal tang of ginseng—everything layered together.
Third drawer on the left.
Xu pulled it. Inside lay the stack of root copies.
Not a bound ledger—loose sheets. Each folded in half, each clipped with a tag.
That made it easier. Taking one sheet didn't mean tearing into a book—and it left less obvious damage.
Xu flipped through slowly—no rush, no mess.Tag, date, handwriting.
The first few were ordinary: dysentery, malaria, winter fever, postpartum weakness.
Then she found it:
A finer sheet than the others—better paper.
The tag held only two characters' worth of label—two blunt syllables in ink:
"Registrar Gu."(abbrev.)
Not a full name. More than enough.
Xu slid it out and opened it with Chao Sheng in the lamplight.
The formula itself was short:
Fritillary. Lily bulb. Ginseng whiskers. Calming powder.
Below it, a line of instruction:
"Half a quarter-hour after medicine, ginseng broth.""At night: no anger, no prolonged sitting."
If Qin Zhao had been inside, he might have read this as a patient's cautions.
Xu wasn't reading illness. She was reading doors.
She turned the sheet over.
On the back were smaller lines—clearly not meant for the patient, but for the delivery hand:
"Tonight as usual: enter by black door.""If wheezing flares: transfer to the west side-courtyard quiet room.""Do not use main entrance. Switch to kitchen door."
Xu's fingers stopped.
Kitchen door.
Another gate.
A gate they hadn't known existed.
Chao Sheng read it and murmured, "The black door isn't the only line."
Xu nodded. "Right.""Normally the medicine uses the black door.""If he wheezes, he's moved to the west side-courtyard quiet room—and the route switches to the kitchen door."
Chao Sheng asked, "What does that tell you?"
"It tells me Registrar Gu isn't nailed to the desk all the time.""When his condition flares, he has to leave the desk."
Xu read the back again, her eyes colder now.
"And now we know how to make him leave."
Chao Sheng asked directly, "Tonight?"
Xu shook her head.
"Not tonight.""The kitchen door is an emergency door. The more 'emergency' a door is, the more likely it hides watchers.""We recognize it first—then we decide how to use it."
She did not take the original sheet.
Instead she drew out paper-thin tracing stock, laid it over both sides, and copied fast—front and back—stroke for stroke.
Chao Sheng glanced at her. "You're not taking the original?"
"No," Xu said. "If the original disappears, the shopkeeper knows at dawn that someone is watching Registrar Gu.""We can't startle him yet."
She returned the sheet to the stack and pressed it back into place exactly as before.
Chao Sheng swept the bottom of the drawer with his eyes and whispered, "There's another."
At the deepest back lay half a scrap of waste paper—its edge cut, as if torn from somewhere else.
Xu drew it out. Only one line was written:
"After Shen's validation mark—deliver."
No subject. No signature.
Still enough.
Registrar Gu's medicine wasn't delivered just because the pharmacy wished it.It entered only after Shen Weijun validated.
Medicine, paper, door—braided tight again.
As they withdrew through the back window, Qin Zhao coughed once at the street corner.
One cough. Unhurried.
Not an alarm—a warning that someone was passing.
Xu and Chao Sheng didn't stop. They slid along the wall line, crossed the courtyard, and climbed out.
As their feet hit the ground, two figures walked past the front street.
Not Suppression. Not Salt Tax runners.
Night watchmen, beating the hours.
Qin Zhao waited until they'd gone and whispered, "No tail."
Xu nodded and tucked the copied prescription instructions into her sleeve.
The three didn't return to the grain shop immediately. They stopped in a dead alley first, and Xu spoke the chain all the way through:
"Four things connect now."
"First: Registrar Gu has a chronic night cough. At night he needs medicine and ginseng broth to prop his breath.""Second: when it worsens, he has to leave the desk and move to the west side-courtyard quiet room.""Third: the transfer doesn't use the black door—it uses the kitchen door.""Fourth: the medicine enters only after Shen Weijun validates."
Hearing it, Qin Zhao finally understood completely.
"So we don't cut the medicine," he said."We watch the kitchen door."
Xu looked at him and nodded.
"Exactly.""We can't cut medicine—cutting medicine startles them.""But we can recognize the right door. Once we recognize it—when Registrar Gu wheezes, we know where he goes."
Chao Sheng added coldly, "Assuming he wheezes tonight.""If the condition doesn't flare, the door doesn't open."
Xu pressed the copied sheet in her palm. Her voice was level.
"He will.""These last days he's been forcing himself to finish the master register and review the gate-sealing notice. Last night ginseng was already increased. Today he's patching pages again.""A man isn't iron. And procedure isn't either."
She lifted her eyes toward the Salt Tax Office.
Windows there were still lit.
"Tonight we don't take pages," she said."Tonight we wait for the door to open."
Historian's Note: Sometimes the hardest door isn't split by steel or burned by fire. It simply waits for the man inside—sickest, yet least able to stop—to push it open by himself, just wide enough to let a slit of air through.
(End of Chapter.)