4. Seeds of Commerce

The dye workshop occupied a neglected corner of the Guo compound, a squat brick building that had once been used for storing raw cocoons before a roof leak ruined half the season's harvest and Guo Chong, in a rare fit of superstitious caution, had ordered the space abandoned rather than repaired. For three days, Lu Yin and Shen Qing had been scrubbing it clean—the floors, the walls, the heavy iron vats that sat squat and rusting in the center of the room like the discarded playthings of giants. The work was brutal, unrelenting, the kind of physical labor that Lu Yin's modern body had never known and his Tang body, weakened by fever, could barely tolerate.

But Shen Qing was relentless. She had thrown herself into the project with a ferocity that Lu Yin recognized from their early days at the restoration studio, when she would work eighteen-hour shifts to save a deteriorating scroll or rebuild a shattered lacquer screen. It was the same intensity, channeled into a different medium. By the third evening, the workshop was clean, the vats were scrubbed and oiled, and the roof had been patched with fresh tiles that Zhou Er had procured from a supplier near the canal at a price that made Lu Yin wince.

"Stop counting the coins," Shen Qing said, catching his expression as they surveyed their handiwork. "Guo Chong gave us fifty strings of cash. We've spent twelve. The rest is for raw materials."

"That's not what I'm worried about. I'm worried about what happens if we fail. Guo Chong isn't a venture capitalist writing off a loss for tax purposes. He's a Tang merchant who will sell us to a labor gang if we don't deliver results."

"Then we deliver results." Shen Qing walked to the nearest vat, running her palm along the oiled iron. "Madder root for red. Indigo for blue. Woad if we can't get good indigo. Alum as a mordant, iron salts for darker shades. I've already identified the local suppliers. The dyehouse across the canal uses all of them, but they don't know how to fix the colors properly. Their reds bleed. Their blues fade to gray within a season."

Lu Yin leaned against the doorframe, watching her. In the three days since her release from the prefectural prison, Shen Qing had transformed. The bruise on her jaw had faded to a greenish-yellow smudge. Her hair, washed and bound up in the simple style of a working woman, no longer looked like a rat's nest. But the change was deeper than appearance. She had acquired a sharpness, an edge of pragmatism that reminded him uncomfortably of the way she handled difficult clients at the studio—polite, professional, and utterly unyielding.

"The technique you described to Guo Chong," he said. "The double-mordant process for achieving true scarlet. That's not Tang-era knowledge. You're introducing a Song Dynasty innovation six hundred years early."

"Seven hundred. The technique wasn't widely used until the Southern Song. And yes, I know." She turned to face him, her expression unreadable. "Is that a problem?"

"I don't know. Is it? We're already possessing dead people's bodies. Now we're introducing anachronistic technology. What's next? Do we invent gunpowder three centuries early and arm the An Lushan rebellion?"

"The An Lushan rebellion doesn't start for another eight years. And gunpowder already exists, it's just being used for fireworks." She crossed her arms. "Lu Yin, I've thought about this. More than you have, probably. We're not going to change the course of history by dyeing silk a slightly better shade of red. The Tang Dynasty is one of the most cosmopolitan, technologically advanced civilizations in the world right now. They absorb innovations constantly. From Persia, from India, from the steppe nomads. One new dye technique won't register as anything more than a clever artisan's discovery."

"And if it does? If someone notices that two supposed servants suddenly possess knowledge that won't exist for centuries?"

"Then we claim divine inspiration. A dream. A visitation from the Silk Goddess." The ghost of a smile crossed her face. "This is an era that believes in omens and portents, Lu Yin. We can use that."

He wanted to argue further, but something in her tone stopped him. Shen Qing had always been the more cautious one, the one who insisted on provenance checks and refused questionable commissions. If she was comfortable with this level of intervention, it meant she had thought it through more thoroughly than he had—or that she was more desperate than she was letting on.

"Fine," he said. "But we need to be careful. Not just about the techniques. About everything. Guo Chong is watching us. His servants are watching us. The prefect's clerk took a bribe to release you, which means he knows our story has holes. We're walking on thin ice, and it's getting thinner every day."

The first batch of silk went into the vats on the fourth day. Shen Qing had sourced raw white silk from Guo Chong's own warehouses, bolts of decent quality that had failed to sell the previous season due to uneven weave. The flaws wouldn't matter; the dye would hide them. She had also procured madder root from a herbalist near the eastern market, alum from a tanner's supplier, and a small quantity of iron sulfate that she had extracted herself from rusted nails soaked in vinegar—a technique that Lu Yin had taught her years ago, when they were both graduate students experimenting with historical pigment reconstruction.

The process was painstaking. The silk had to be pre-mordanted in an alum bath, then simmered in the madder dye at precisely the right temperature for precisely the right duration. Too hot, and the color would be dull. Too long, and the silk would weaken. Shen Qing monitored the vats with the obsessive attention of a chemist in a laboratory, adjusting the fire beneath them, testing the dye concentration with strips of scrap fabric, muttering to herself in a mix of English and Tang-era Chinese that would have baffled any eavesdropper.

Lu Yin handled the logistics. He negotiated with suppliers, haggling over prices with a fluency that surprised even himself. He managed the workshop accounts, recording every expenditure in a ledger that he kept locked in a wooden chest beneath his sleeping pallet. He dealt with Zhou Er, who had appointed himself their unofficial liaison to the rest of the Guo household and who delivered a steady stream of gossip along with the supplies he brought.

"Guo Chong's wife is not pleased," Zhou Er announced on the morning of the fifth day, settling onto a stool in the corner of the workshop while Lu Yin ground madder root into powder. "She thinks the master is wasting money on a pair of unknown relatives who will probably ruin good silk and disappear in the night."

"Guo Chong's wife? I thought Madam Liu was his concubine."

Zhou Er snorted. "Madam Liu is the concubine. Lady Wang is the wife. She lives in the rear courtyard with her two daughters and a resentment the size of Mount Tai. Guo Chong married her for her family's connections—her father is a district magistrate in Henan—but she's given him no sons, and her influence has been waning ever since Madam Liu arrived three years ago."

Lu Yin filed this information away with the careful precision of a man who understood that household politics could be as dangerous as any battlefield. "And Madam Liu? What's her position?"

"Favored, but precarious." Zhou Er lowered his voice conspiratorially. "She's clever, that one. Knows how to manage the master's moods. But she's also made enemies. Lady Wang hates her, obviously. And the steward resents her because she's been pushing for her own brother to take over the eastern warehouse accounts."

"And Guo Chong himself?"

"A hard man but a fair one, mostly. He built this business from nothing—started as a caravan guard on the Silk Road, saved enough to buy his first bolt of silk, traded his way up over twenty years. He's not a scholar or a nobleman. He's a self-made man who respects results." Zhou Er eyed the bubbling vats with open skepticism. "Whether your results will impress him is another matter."

"They'll impress him," Lu Yin said, with more confidence than he felt.

On the sixth day, the first batch was ready. Shen Qing lifted the silk from the dye vat with a long wooden pole, the wet fabric catching the morning light that streamed through the workshop's single window. The color was extraordinary. Not the muddy brownish-red that passed for scarlet in the local markets, but a deep, luminous crimson that seemed to glow from within, like wine held up to a flame. It was the color of emperors, of temple banners, of blood and fire and everything that the Tang Dynasty, in its opulent prime, revered.

Even Zhou Er, who had seen a thousand bolts of silk pass through the Guo warehouses, fell silent when he saw it.

"Ancestors protect us," he breathed. "That's not dye. That's sorcery."

"It's chemistry," Shen Qing said, but she was smiling—a real smile, the first Lu Yin had seen on her face since they had arrived in this impossible century.

Guo Chong arrived at the workshop an hour later, summoned by Zhou Er's excited babbling. He was accompanied by Madam Liu, who glided into the room in a gown of pale yellow silk and stood in the corner, her dark eyes taking in everything with the quiet watchfulness of a cat.

The merchant examined the dyed silk in silence. He held it up to the light, rubbed it between his fingers, smelled it, even touched it to his tongue. Then he laid it across his workbench and fixed Lu Yin and Shen Qing with a stare that was impossible to read.

"This color," he said. "Can it be reproduced? Consistently?"

"Yes," Shen Qing said. "The formula is precise. As long as we can source the same quality of madder root and maintain the same temperatures, every batch will be identical."

"How many bolts can you produce in a month?"

"With this equipment? Twenty. If you invest in larger vats and hire two assistants, we can triple that."

Guo Chong stroked his beard, his eyes moving between the scarlet silk and Shen Qing's face. "This color has not been seen in Bianzhou before. I've traded in silk for twenty years. I know every dyehouse from here to Chang'an. No one produces a red like this."

Shen Qing said nothing. Lu Yin held his breath.

"You told me you learned dyeing from your mother in Yangzhou," Guo Chong continued. "Yangzhou dyers don't know this technique either. I've bought their goods. Their reds are pale. Weak. Nothing like this."

"I learned from my mother," Shen Qing repeated, her voice steady. "But I have also experimented on my own. Trial and error. Many failures before I found the right formula."

Guo Chong was silent for a long moment. Then he laughed—the same deep, rumbling laugh that Lu Yin had heard in their first meeting, but warmer this time, almost paternal. "Trial and error! I like that. I built my own fortune on trial and error, girl. Twenty years of trial and error, and a mountain of errors along the way." He clapped his hands together. "Very well. You'll have your larger vats. Your assistants. I want sixty bolts of this scarlet silk ready by the end of the next moon. There's a caravan heading to Chang'an, and the noble ladies of the capital will pay a fortune for colors their rivals can't match."

Madam Liu stepped forward, her silk slippers making no sound on the packed earth floor. She was looking at Shen Qing with an expression that Lu Yin could not quite interpret—respect, perhaps, or calculation, or something more complicated.

"The women's quarters have need of a skilled weaver," she said, her voice soft but carrying an undertone of authority. "The master speaks highly of your talents. Perhaps, once the workshop is established, you might spare some time for private commissions. The ladies of Bianzhou talk. If they see me wearing colors that cannot be found anywhere else in the city, your reputation will spread faster than any caravan can carry it."

It was a shrewd offer, wrapped in a flattering request. Shen Qing recognized it for what it was—an alliance, tentative but promising. Madam Liu was offering to become their patron, their entry point into the inner circles of the Guo household. In return, she wanted exclusive access to whatever innovations they produced.

"Madam is too kind," Shen Qing said, bowing. "This humble one would be honored to serve."

That night, Lu Yin and Shen Qing sat in the workshop, sharing a flask of cheap rice wine that Zhou Er had left behind. The scarlet silk hung from a drying rack in the corner, its color muted in the dim lamplight but still extraordinary. Outside, the sounds of the Guo household settling into sleep—the creak of doors, the murmur of voices, the distant barking of a dog—faded into a comfortable hum.

"We did it," Lu Yin said, staring at the silk. "One week. We went from prisoners to partners."

"Don't get complacent." Shen Qing took a sip of wine, her face pinching at the harsh taste. "Guo Chong knows we're lying about our origins. He just doesn't care as long as we're profitable. But if the profits stop, or if someone more powerful takes an interest in where we came from, his protection will vanish."

"You're always looking for the cracks."

"Someone has to. You're always looking for the opportunity." She set down the flask. "It's why we work well together. Was, anyway. In the studio."

The mention of the studio brought a weight into the room that neither of them had been willing to acknowledge during the frantic days of setting up the workshop. Lu Yin stared at his hands—his new hands, thinner and rougher than his old ones, but already callusing in familiar patterns from the work he had been doing.

"We need to talk about the mirror," he said.

"I know."

"I've been asking questions. Discreetly. Zhou Er has contacts among the antiquities dealers in the eastern market. I told him I was interested in old bronze work, mirrors particularly. He said there's a merchant named Sun who specializes in Han and pre-Han metalwork. He operates out of a shop near the Drum Tower."

"You think he might know about the mirror?"

"I think he might know about mirrors in general. The symbols. The inscriptions. The rituals." Lu Yin leaned forward, lowering his voice. "The mirror we found—it wasn't just a mirror. The cracks, the light, the voice you heard. Someone in this era made that object. Someone understood what it could do. If we can find the original, or find records of how it was created, we might find a way to reverse what happened to us."

Shen Qing was silent for a long moment, her gaze fixed on the scarlet silk. When she spoke, her voice was barely above a whisper. "And if we reverse it, what do we go back to? The studio? The rent? The arguments about credit and recognition and whose name goes on the certificate?"

"We go back to our lives."

"I'm not sure I have a life to go back to. My mother's medical bills were piling up before we left. The studio was barely breaking even. My last relationship ended three years ago, and I haven't had a second date since." She looked at him, her eyes catching the lamplight. "You accused me of collecting all the rewards. But what rewards, Lu Yin? What did I actually have that was worth keeping?"

The question hung in the air between them, raw and unexpected. Lu Yin thought about his own life—the rented apartment, the distant parents who called twice a year, the string of failed relationships that had all ended with the same accusation: you're married to your work. Was that a life worth returning to? Was it even a life at all?

"We have time," he said finally. "We don't need to decide tonight. Let's build the business. Let's get established. And then we'll figure out what we actually want."

Shen Qing nodded slowly. "That's the first sensible thing you've said since we arrived."

She stood, brushing straw from her robe, and walked toward the door. But she paused on the threshold, her silhouette framed against the darkness outside.

"Lu Yin. That night in the studio. Before the mirror broke. You said you were tired of being the shadow. Of being my assistant." She didn't turn around. "I need to know. If you could go back and change things—not the argument, but everything before it—would you still want to be partners? Real partners? Or was that just something you said because you were afraid I wouldn't help you?"

The question was so direct, so unexpected, that for a moment Lu Yin couldn't speak. He thought about the years of accumulated resentment, the sleepless nights, the client meetings where he was introduced as "Shen Qing's colleague" rather than as her equal. He thought about the mirror slipping through his fingers, the rage that had made him careless. He thought about the seed that had planted itself in his mind the night before, the dark thought that maybe he didn't want to go home at all.

"I meant it," he said. And it was true. It was also incomplete, but she couldn't see his face in the darkness, and he was grateful for that.

Shen Qing nodded, once, and disappeared into the night.

Lu Yin sat alone in the workshop for a long time after she left, staring at the scarlet silk and thinking about mirrors and doors and the terrible weight of wanting something that you could never quite name. The wine was gone. The lamp was burning low. And somewhere in the back of his mind, the dark seed was sprouting roots, reaching tendrils into soil that had been prepared for a very long time.

He did not know it yet, but the betrayal had already begun. It had begun the moment he realized that in this world, Shen Qing was not the star. She was a servant with a useful skill, dependent on his connections to Guo Chong, his negotiations with the household, his ability to navigate the male-dominated world of Tang commerce. For the first time in their decade-long partnership, Lu Yin held the advantage.

And he was not sure he wanted to give it up.

Outside, the moon rose over Bianzhou, indifferent and eternal, while the canal water lapped against stone embankments and the city dreamed its ancient dreams. In the women's quarters, Madam Liu sat before her bronze mirror, brushing out her hair and thinking about scarlet silk and the strange, sharp-eyed woman who had conjured it from nothing. In the study, Guo Chong counted his profits and planned his expansion. And in the servants' quarters, a man who was not Lu Lang and not quite Lu Yin stared at a cracked ceiling and wondered what kind of man he was becoming.

The answer, when it came, would destroy them all.