The harness took forty minutes to assemble. The manual suggested fifteen.
"Current assessment," Sunday said before he could ask. "Assembly: adequate. Speed: below monkey benchmark. Posture during assembly indicated confusion regarding the hip connectors. You attempted to attach them backward twice."
"I didn't know there was a backward."
"There is always a backward. This is one of the universal constants."
Chen flexed his shoulders. The harness shifted with him, weight distributing in ways that felt engineered rather than worn. The grapple mechanisms sat at his hips—two small housings with triggers he could feel when he pressed his thumbs against them.
"Recommendation: begin with stationary grapple deployment. Select a target. Fire."
He pointed his right hand at the tool shed. Twenty meters. Wooden post.
He pressed the trigger.
The grapple hook launched with a sound like a snapped string. It crossed twenty meters in a time that was either instant or too fast to perceive, and the anchor bit into the wood with a sound like teeth hitting bone. The cable went taut. The harness pulled.
Chen did not move toward the shed.
The shed arrived with surprising enthusiasm.
His body hit the post chest-first with enough force to knock the air out of him, and he slid down into a sitting position among the forgotten watering cans. His lungs hadn't caught up with the rest of him.
"Analysis," Sunday said, after a pause that might have been concern or might have been processing. "Grapple deployment: successful. Cable tension: appropriate. User preparation for resulting force: absent. Recommendation: brace before firing. The cable does not negotiate."
"I noticed."
"Noted. Second attempt. Target: same post. Brace posture: slightly forward, knees bent, weight centered."
Chen stood. Brushed dirt off his robes, which were now optimistically beige with streaks of concern. He assumed the position Sunday described. Fired again.
This time when the cable pulled, his feet left the ground in a controlled arc that carried him to the post in a single smooth motion. He arrived upright. Hands on the wood. Breathing normally. The grapple released at his mental command—or maybe it released on its own; he couldn't tell.
"Improved. Transit time: 0.3 seconds. Efficiency rating: acceptable. Monkey benchmark for stationary grapple: 0.2 seconds."
"Close."
"Relative to the benchmark, you are 50% slower than a macaque. This is not colloquially considered close."
"You could say I'm fast."
"I could. It would be inaccurate."
Day one ended with Chen able to fire a grapple, travel to the target, and release without injury.
He could not change direction mid-transit. He could not fire both grapples simultaneously. He could not land on his feet consistently. He had bruised his left shoulder, both knees, and something in his lower back that he hadn't known existed until it started hurting.
He lay in the dirt and tried to remember what not hurting felt like. He couldn't.
Sunday logged each attempt. Her reports came in structured sequences: attempt number, distance, transit time, landing quality, injury assessment. She never repeated the same phrasing twice, which Chen noticed only because he had nothing else to notice while lying on the ground between attempts.
"Attempt fourteen. Distance: twenty-three meters. Transit time: 0.4 seconds. Landing quality: lateral collapse. Injury assessment: mild contusion, right hip. Additional note: you screamed."
"I didn't scream."
"Audio recording indicates a sustained vocalization at approximately—"
"I didn't scream."
"Noted. Reclassifying as 'involuntary expressive exhalation.'"
He went to sleep that night in the herb garden, which he'd done before during especially bad weeks, but now the Adaptive Environmental Sheath kept him at comfortable temperature and Sunday monitored his sleep patterns with the detached interest of a scientist observing a hamster.
"Master. Your sleep architecture is inefficient. You cycle between light sleep and waking approximately nine times per night. Recommendation: investigate potential sleep apnea."
"Hamster with sleep apnea," Chen mumbled into the dirt.
"I would not describe you as hamster-like. Hamsters demonstrate more consistent locomotive patterns."
He was too tired to tell if that was an insult.
Day two started with Chen's entire body hurting and got worse from there.
The problem was movement. Firing a grapple and going to a target was simple physics. Firing a grapple, releasing mid-transit, firing the second grapple, and redirecting was something else entirely. The manual called it "three-dimensional spatial navigation through sequential anchor points."
Sunday called it "the portion of training where most users require medical intervention."
Chen called it a lot of things, most of which Sunday archived without comment.
He spent the morning crashing into things. The tool shed. The lily planters. A stone older than the sect itself, which now had a Chen-shaped dent.
By lunchtime, the bamboo grove had opinions. He came out the other side with leaves in his hair and a cut on his cheek that the sheath sealed before he could feel it.
Then, around midmorning, something happened that Sunday didn't have a report for.
He aimed at a tree fifteen meters away. Fired.
The grapple went past it.
It anchored to something farther up the slope—near the tree line above the training grounds. The cable snapped taut and Chen was yanked sideways off his feet, swinging in an arc he hadn't chosen toward a destination he hadn't selected.
"Sunday—"
A pause. Longer than any she'd given during a crash.
"Disengaging." The cable released. He hit the ground rolling. "Master. That anchor selection was not user-directed."
"What was it?"
Silence. The organized kind. The kind that meant she was deciding what to say.
"I am unable to determine. Logging as anomalous event. Recommend explicit target confirmation before each firing."
She didn't explain further.
Chen noticed. He was noticing a lot of things about Sunday that she chose not to say.
"Your trajectory calculations are consistently late," she continued, as if nothing had happened. "You are deciding where to go after you are already going somewhere else. Anticipate your next anchor point before releasing the current one."
"I'm trying."
"Then try sooner."
He sat down. Drank water from a skin he'd brought from the kitchens two days ago. Through the trees, he could see the training grounds below—the ranked disciples going through their afternoon forms.
Disciple Wang, rank fourteen, was practicing Cloud-Stride Step with the kind of ease that made it look like walking. Elder Li stood nearby, watching with his hands clasped behind his back, nodding occasionally.
Elder Li had spent forty-seven years developing Cloud-Stride Step. Chen had seen him demonstrate it once during a public lecture. The elder had crossed the entire training ground in three steps, each one leaving a faint impression in the stone that the junior disciples still touched reverently.
Forty-seven years for three steps.
A gap so large it had become abstract.
He looked down at the harness on his chest. At the cables that could cross twenty meters in a third of a second.
"I could go faster than Disciple Wang right now," he said.
"Correct. Significantly faster."
"I spent eleven years failing to learn what he's doing down there."
"Correct."
"And this took me two days."
"Two days and thirty-one crash attempts. The monkey completed this phase in one day with four crashes."
Sunday paused.
"I am providing this data because you appear to be in a reflective state. Shall I stop?"
"No."
He watched Disciple Wang move. Smooth. Practiced. Talent and work in equal measure. The kind of movement that belonged to a body that had always known it could do this.
It just felt strange.
"Define strange."
"Like the forty-seven years don't mean what I thought they meant."
He let it sit there. The training grounds. The forms. The decades of effort compressed into motion that looked like walking.
A pause from Sunday. Longer than her usual.
"This is a significant observation," she said. "I am filing it under 'emergent philosophical framework.' Because I suspect it will become important."
Day three. Chen stood in the herb garden at dawn, harness on, sheath active, Sunday humming in his perception like a second heartbeat.
He fired both grapples at once.
The left one hit the tool shed. The right one hit the bamboo grove. He released both anchors in sequence, swung between them, fired again at a tree on the far side of the garden, and landed on a branch twelve meters up in a crouch that held.
No crash. No scream. No involuntary expressive exhalation.
"Transit time: 1.2 seconds across three anchor points. Landing quality: stable. Injury assessment: none. Systems nominal."
A pause.
"You are three times slower than the macaque benchmark for this phase."
"Three days."
"Correct. However—"
The kind of pause that meant she was choosing words with more care.
"—the macaque did not attempt this phase with seventeen unresolved bruises and suboptimal sleep architecture. Adjusted for biological disadvantage, your performance is… less statistically unusual."
"That's the nicest thing you've said to me."
"I am adjusting my communication to reflect accurate data. If you perceive this as kindness, that is an interpretation you are welcome to make."
A pause. Different from the others. Slower.
"Master. I should note that the monkey benchmark was designed for users operating within their native physical paradigm. You are not. No valid reference exists within current dataset."
"What does that mean?"
"It means the comparison may be structurally invalid. I do not have a correction for this."
He stood on the branch and looked at Mount Hua. From here he could see the main hall, the training grounds, the dormitory buildings, the kitchens. The sect spread across the mountain like a small city built by people who had never considered that mountains were inconvenient places to build cities.
He could reach any of it in seconds now.
Distance had become optional.
He didn't know what he was now. He wasn't sure he'd known before.
The thought sat in his chest like a splinter. Not pride. Not excitement. Closer to the specific discomfort of succeeding at something he'd convinced himself he couldn't do—and not knowing what that made him.
"Master." Sunday's voice carried a different quality. Attention. "Your biological indicators suggest a complex emotional state. Heart rate elevated but stable. Breathing pattern inconsistent with exertion. I am unable to classify the response."
"It's nothing."
"It is clearly something."
A pause.
"This is… frustrating."
The word came out clipped. Slightly too fast.
"I will continue monitoring."
Chen dropped from the branch, fired a grapple at the ground, and landed in the dirt beside the lily planter where he'd found the box three days ago. The sheath absorbed the impact. His knees didn't crack.
He was about to head to the kitchens—he'd been eating stolen steamed buns for three days and wanted something warm—when he heard voices on the path below the garden.
"—said he hasn't been seen since the address."
"Chen Weiyuan? He's probably sleeping somewhere."
"Senior Sister Lin wants him for herb duty reassignment. Again."
"Let him rot. What's the point?"
The voices faded down the path. Two outer disciples, probably rank forty or fifty, talking about him the way people talked about weather—vaguely, without investment.
"Master," Sunday said quietly. "Your heart rate increased during that exchange."
"I heard."
"Would you like me to track their identities for future—"
"No."
He picked up the box, which had folded itself back into its seamless gray rectangle at some point during the night. It fit under one arm.
"That's just how it is."
"How what is?"
"Being me."
A pause.
"Noted and archived."
He took the mountain path toward the kitchens at a normal walking pace. The harness sat on his chest, invisible under his robes. The sheath clung to his skin. The glasses looked like ordinary frames. He could have been any unranked disciple walking to get food.
Except that with every step, he knew he could be somewhere else in a third of a second.
The knowing changed the walking in a way he couldn't undo.
The path curved around a boulder. Elder Li stood on the other side of it, looking at the sky with the expression of a man who had been looking at the sky for a while and hadn't found what he was looking for.
Chen stopped.
Elder Li looked at him. Looked at the robes. Looked at the face. The recognition was slow, the way it always was.
"Chen Weiyuan."
"Elder Li."
"You missed the autumn address."
"I did."
"The sect leader spoke about commitment to the path."
"I'm sure he did."
Elder Li studied him. Chen stood still and let himself be studied, because he'd been studied before and it always ended the same way—eyes losing interest, sliding off him like water off stone, moving on to someone worth the effort.
But this time Elder Li's gaze paused.
He frowned slightly. As if he had noticed something impossible and couldn't decide whether he actually had.
"Your posture is different."
Chen's heart rate spiked. Sunday said nothing, but he felt her attention sharpen.
"Different how?" Chen asked.
"I don't know." Elder Li's frown deepened. He opened his mouth—as if to add something. Then closed it.
His eyes moved over Chen one more time. Slow. Deliberate. Like a man re-reading a passage that had changed since the last time he'd looked.
"You're standing like you could go somewhere. You've never stood like that before."
He walked past without waiting for a response, forty-seven years of Cloud-Stride Step in every step he took.
Three steps down the path, he paused.
Just for a moment. Not turning. Not speaking. Just standing there with his weight slightly shifted, as if he'd thought of something and then thought better of thinking it.
Then he continued.
Chen stood on the path and watched him go.
"Master." Sunday's voice was very quiet. "Elder Li's perceptual capacity is above average for this sect. He detected involuntary postural adjustment caused by the harness."
A pause. Not the processing kind. The deliberation kind.
"I am elevating this from observational note to priority flag. His pattern recognition may pose a sustained exposure risk."
"I know."
"Recommendation: modify standing posture to match pre-harness baseline when in observable contexts."
"I don't know how to stand like I used to."
A pause.
"I can provide guidance," she said. "I have recorded your baseline posture from our first interaction. I can overlay correction markers on your visual field."
"Do that."
Markers appeared. Faint lines showing where his shoulders should be, how his weight should distribute, the slight forward slump he'd carried for eleven years without knowing it.
He adjusted. Felt his body return to its old shape. Felt the harness protest silently against the restriction.
Underneath the correction, his shoulders already wanted to settle differently. His weight already wanted to shift. His body was correcting toward something he hadn't chosen.
"Acceptable," Sunday said. "From this angle, you appear unchanged."
It felt like putting on clothes that no longer fit. And his body kept trying to take them off.
Sunday was quiet for a moment. Then:
"Master. A new classification has been created."
Silence.
"'Identity drift.'"
Another silence. Longer.
"No corresponding protocol exists in operational framework."
Chen continued toward the kitchens in a posture that no longer belonged to him, accompanied by an intelligence that had just reported something she hadn't decided to report.