"The communicative band," Yun Mei said, and dropped three pages of frequency analysis on the corridor floor between Wei Long and Latch. "The previous bearer excluded it."
It was oh-five-hundred. She'd been working through the night again. The ink on her hands had dried into patterns that looked like bruises. Her hair was unwashed, pulled back with what appeared to be a strip of torn notebook paper. She looked like a person who had forgotten that bodies needed things other than data.
"Excluded it from what?" Wei Long asked.
"From the lattice's absorption spectrum. The self-propagating instructions that the previous bearer embedded in the lattice material include specific parameters for energy absorption. Which frequencies the crystal converts to growth. Which ones it ignores." She knelt beside the pages, pointing to a graph she'd drawn in blue ink, the x-axis labeled with frequency ranges, the y-axis with absorption percentages. "The metabolic band: ninety-two percent absorption. The structural band: sixty-seven percent. The regenerative band: eighty-four percent. The communicative band—" She tapped the rightmost section of the graph. The line was flat against the x-axis. "—zero."
Latch took the graph. Read it the way he read everything: slowly, with the biological expertise of three millennia applied to each data point.
"The communicative frequencies are the ones the fold uses for its biological transmissions," he said. "The garbled message. The coordinate data. The warning markers. The fold's voice."
"The fold's voice. And the previous bearer chose not to silence it." Yun Mei sat back on her heels. "The lattice absorption parameters are deliberate. Shaped. The previous bearer designed the lattice to consume metabolic energy, structural energy, regenerative energy. Everything the fold needs to grow and heal and reproduce. But they left the communication band completely untouched. The fold can still talk. The lattice breaks the transmission pathway — fragments the signal, garbles the data — but it doesn't absorb the energy that carries the signal."
"They wanted the fold to be heard," Latch said. "Eventually. By the next bearer."
"They wanted the fold to be heard." Yun Mei took the graph back. "And that exclusion gives us our filter."
---
The logic was elegant enough that Latch stopped arguing within four minutes. A personal record.
The daily conduit sent broad-spectrum maintenance energy through the bridge pathway to the eleven-percent fold. The lattice fragments in the pathway walls absorbed a portion of that energy because broad-spectrum included metabolic, structural, and regenerative frequencies — all within the lattice's appetite. The pathway lattice grew thicker with each conduit. The fold received less energy. The maintenance that was supposed to save the node was feeding the disease that was killing the network.
But communicative frequencies passed through untouched.
"The fold's biology can process communicative-band energy for basic maintenance," Yun Mei said. She'd switched to red ink for the protocol diagrams, the color coding instinctive after weeks of annotating Shen's corrupted data. "Communicative energy isn't optimized for metabolic support. It's designed for signal transmission. But biological systems are adaptable. A fold organism receiving communicative-band energy can convert a portion of it to metabolic function. The conversion is inefficient. Approximately forty percent compared to direct metabolic-band delivery."
"Forty percent," Wei Long said. "Less than half."
"Less than half. But one hundred percent of forty percent is better than eighty-eight percent of one hundred percent minus twelve percent pathway absorption minus accelerating lattice growth that reduces tomorrow's delivery to eighty-five percent and next week's to seventy." She looked at him. "The targeted protocol delivers less energy. But every unit of energy arrives at the fold. Nothing goes to the lattice. Nothing feeds the crystal. Nothing makes the problem worse."
"The neural load," Yue said through the bond. "If the efficiency is forty percent, Wei Long needs to hold the conduit longer to deliver the same maintenance. Longer conduit means higher sustained neural load."
"Yes." Yun Mei didn't flinch from it. "The current conduit runs fifty-five seconds at peak neural load of thirty-seven. To deliver equivalent maintenance through the communicative band at forty percent efficiency, the conduit would need to run approximately ninety seconds."
"Ninety seconds at what neural load?"
"The narrow-band conduit uses a different energy profile. The Crown's substrate shapes the output instead of releasing broad-spectrum. The shaping process adds processing overhead. Estimated peak neural load: forty-two to forty-four."
Wei Long flexed his fingers against the floor. Forty-four was higher than anything he'd sustained. The feedback loop incident had spiked to seventy-five, but that had been an uncontrolled emergency. Forty-four was controlled, sustained, for ninety seconds. The substrate at thirty-four percent could handle it. Probably.
"Test it," he said.
---
Latch monitored from the wall. Yue counted neural load through the bond. Yun Mei stood in the corridor with her hands pressed to the tissue at a point downstream of the conduit pathway, measuring lattice response in the nearest connection point.
Wei Long pressed his palms to the junction wall. The Crown's substrate opened the conduit pathway to the eleven-percent fold. Normal. Familiar. The channel stretching through the bridge architecture, the watcher's maintenance energy available for projection.
Then he shaped it.
The Crown's substrate had the processing capacity at thirty-four percent to filter the watcher's broad-spectrum output into a single frequency band. The communicative frequencies separated from the metabolic, the structural, the regenerative. Like splitting white light through a prism and selecting only the blue. The other frequencies dissipated back into the substrate, unused. The communicative band alone channeled into the conduit pathway.
The energy left the junction. Wei Long tracked it through his awareness of the bridge, the narrow-band pulse traveling the pathway toward the distant node. Past the first connection point where lattice fragments lined the channel walls. Past the second. Past the third.
Through.
Not past. Through. The communicative-band energy moved through the lattice deposits the way light moved through glass. The crystal didn't absorb it. Didn't interact with it. The narrow-band pulse reached each connection point and kept going, unchanged, undiminished, arriving at the eleven-percent fold with the same intensity it had left the junction.
"Neural load at forty-one," Yue reported. "Forty-two. Holding."
The shaping process was harder than a standard conduit. The Crown's substrate worked to maintain the frequency filter, the processing overhead a constant drain that added three to five points of neural load above the baseline. The difference between carrying a weight and carrying a weight while balancing on one foot.
He held. Thirty seconds. Forty-five. Sixty. The narrow-band energy reaching the distant fold, the communicative frequencies arriving at the organism's biology with no pathway losses, no crystal absorption, no lattice feeding.
"Seventy-five seconds," Yue said. "Forty-three. Forty-two."
The load was dropping slightly. The substrate adjusting to the shaping process, the architecture learning the frequency filter the way a muscle learned a new movement. Still harder than broad-spectrum. Still higher neural load. But the adaptation was visible.
Ninety seconds. He disconnected.
"Yun Mei," Wei Long said.
"Zero." Her voice carried the satisfaction of a hypothesis confirmed. "Zero absorption at the first connection point. Zero at the second. Zero at the third. The lattice didn't register the communicative-band energy. The pathway crystal has not grown. Not by a single molecule."
"Latch. The eleven-percent fold."
The elder's hands were on the wall. Reading the distant node with the careful attention of a physician monitoring a patient's response to a new treatment.
"Eleven-point-two percent."
The number sat in the corridor. Nobody spoke for a moment.
Eleven-point-two. Up from eleven-point-one, where the fold had been stalled for days. The first improvement since the broad-spectrum conduits had started feeding the pathway lattice and reducing delivery efficiency below the maintenance threshold.
"It moved," Latch said. Quietly. "One-tenth of a percent. But the trajectory is upward. The fold received more effective maintenance energy from ninety seconds of narrow-band delivery than it received from fifty-five seconds of broad-spectrum delivery at eighty-eight percent efficiency." He pulled his hands from the wall. "The protocol works."
"Daily conduits?" Wei Long asked.
"Daily conduits. The communicative band doesn't feed the lattice. There's no reason to restrict the frequency." Latch looked at Yun Mei. The look lasted longer than it should have. The professional respect from earlier, but something else underneath — the recognition that the researcher's crystallographic analysis had just solved a problem that his biological expertise alone had not been able to touch. "We can run the targeted conduit every day without accelerating lattice growth in the pathways."
"The neural load at forty-two to forty-four is sustainable for daily sessions?"
"At current capacity, yes. The substrate's adaptation will reduce the overhead within a few days of regular practice. The load will stabilize at forty to forty-one." Latch paused. "But at forty percent capacity, when we add the lattice clearance and the bridge transit and the wellspring intervention — the baseline neural load will be higher. Adding a ninety-second targeted conduit on top of clearance operations is a different calculation."
"We'll model it when we get there. For now, the eleven-percent fold gets daily targeted conduits."
Yun Mei gathered her frequency analysis pages from the floor. Three pages of blue and red ink, the product of a night's work, the solution to a problem that had been eating the network's infrastructure through the very mechanism designed to save it. She folded the pages into her notebook and walked back toward the lattice section without another word.
The researcher's priorities hadn't changed. The lattice encoding still needed mapping. The absorption spectrum still needed completing. The targeted conduit protocol was a side product, a useful discovery made while pursuing the primary objective. She'd already moved on to the next problem before the corridor stopped celebrating the solution to the current one.
---
Chen Bai's detection threshold analysis arrived at fourteen-hundred.
"Zhiqiang's aides provided the technical specifications for Heavenly Spirit Sect's perimeter arrays," the analyst reported through the relay. His pen was moving at its usual speed — the urgent cadence of the morning's Liu Chen briefing replaced by the methodical rhythm of technical analysis. "Standard Alliance issue. Model year eight-twelve. The same arrays the Bureau deploys for regional monitoring. They weren't upgraded when Heavenly Spirit Sect registered the territory eleven years ago because the sect's financial priorities lean toward cultivation resources, not surveillance infrastructure."
"Detection threshold?"
"The arrays detect dimensional energy output above approximately thirty-eight percent of a seventh-realm cultivator's peak signature. That's the baseline for the model. Heavenly Spirit Sect may have calibrated their specific installation differently, but Forty-Seven's asset confirmed the arrays are running factory settings. The sect's security director considers the territory low-risk. Internal cultivation ground, no contested borders, no history of incursion." Chen Bai's pen tapped twice. "The Crown's dimensional signature at forty percent capacity is different from a cultivator's signature, but the arrays measure energy output in absolute terms, not signature type. The Crown's output at forty percent capacity equals approximately ninety-three percent of a seventh-realm cultivator's peak."
"Over the detection threshold."
"Significantly over the detection threshold. At full output, the Crown at forty percent would light up every array in a two-kilometer radius." The pen resumed. "But the Crown's output is adjustable. The substrate's processing can be throttled. If you reduce the Crown's active output to below thirty-five percent of its maximum capacity at forty percent — which means operating at approximately fourteen percent of total substrate processing — the dimensional signature drops below the array's detection floor."
"Fourteen percent of substrate processing."
"Fourteen percent. At forty percent Crown capacity, that gives you access to dimensional awareness, basic communication through the substrate, and limited interface with the fold's biology. Enough to navigate the fold's interior architecture and reach the dimensional boundary. Not enough for—" The pen stopped. Started. "Not enough for lattice clearance. Not enough for conduit operations. Not enough for combat applications, if any exist."
"I'm not going there to fight."
"You're going there to disable an extraction apparatus maintained by four sect alchemists. At fourteen percent processing, the Crown can't generate the resonance needed to interfere with the apparatus directly. You would need to physically dismantle whatever Liu Chen's people built." A pause. "Physically. As in with your hands."
Wei Long pressed his palm against the wall. The fold's heartbeat. The Crown at thirty-four-point-two percent, the substrate humming with processing capacity that he would need to suppress to a whisper the moment he crossed into Heavenly Spirit Sect's territory.
"What can I do at fourteen percent?"
"See. Think. Communicate with Yue through the bond. Interface with the seventeen-percent fold's biology if you make direct contact. Read the fold's condition. Navigate the fold's architecture." Chen Bai listed each capability with the precision of an inventory. "You cannot project energy. You cannot run conduits. You cannot clear lattice. You cannot mask your presence beyond what the low output already provides. You are, for all operational purposes, a blind man with very good hearing walking into someone else's house."
"I was a blind man with very good hearing before the Crown. I managed."
"You managed in the Abyss where nobody was watching. Heavenly Spirit Sect's cultivation ground is watched by four alchemists, a rotating security detail, and arrays that will detect you the instant you exceed fourteen percent processing."
"Then I don't exceed fourteen percent."
"And if something goes wrong at the wellspring site and you need the Crown's full capacity?"
The corridor was quiet. The fold's heartbeat. The answer to Chen Bai's question was obvious, and nobody wanted to say it.
"If I need full capacity, every array in two kilometers lights up and Zhiqiang's political cover becomes the only thing standing between us and an Alliance investigation."
"Yes."
"Then nothing goes wrong."
Chen Bai's pen scratched once. A single mark on paper. The analyst's way of noting a conclusion that he disagreed with but couldn't improve.
"Eight days to forty percent," Chen Bai said. "The exponential curve ticked up again in today's session. Yue's revised estimate."
Eight days. The timeline compressing. The Crown growing faster, the seventeen-percent fold dying faster, the corruption approaching faster, the lattice spreading, the politics tightening, everything accelerating toward the convergence point that sat on the calendar like a wall at the end of a narrowing hallway.
Wei Long stood. Walked to the conduit pathway section. Pressed his hands to the wall and ran the targeted conduit again, because the eleven-percent fold needed its daily maintenance and the narrow-band protocol needed practice and his substrate needed to learn the frequency filter until forty-two felt like thirty.
Ninety seconds. Neural load peaked at forty-one-point-eight. The adaptation was already visible.
The fold's heartbeat pulsed against his palms, warm and steady, the organism receiving clean energy through a channel that finally stopped feeding the thing trying to kill it.
Small victories. In a timeline where everything was compressing toward disaster, small victories were the only kind available.
He'd take them.
