Gu Qingxue's controlled test was scheduled for a Thursday afternoon, when the hospital had enough specialists available and fewer urgent surgeries in progress. The official name was long, prudent, and almost cowardly: minimal provocative observation under tiered monitoring.
Lin Xuan had worded it that way because words mattered. If he called it mere provocation, the Gu family would see cruelty. If he called it a study, some doctors would forget there was a person feeling every data point.
Qingxue read the consent for ten minutes, not because she did not understand it, but because she refused to sign something others had summarized for her. Her aunt Gu Yalan was present, sitting with a straight back.
Director Liang was there too.
Zhang Min checked the equipment.
Zhao Linger prepared materials with a calm that was not natural, but was useful.
"You may stop at any time,"
Lin Xuan said.
Qingxue looked up from the document.
"I know that already. Tell me what is not written."
He closed the folder.
The room had frosted glass walls and equipment arranged with almost military precision. Outside, a nurse passed every few minutes pretending not to look.
"What is not written is that we may not obtain a clear answer. We may cause discomfort and learn little. There is also a risk that the phase progresses faster than expected. We will have defined limits, but no limit makes it comfortable to feel your body slipping away."
Gu Yalan observed Lin Xuan with sharp attention.
Qingxue did not look away.
"Good,"
she said.
"I prefer that answer to a professional smile."
She signed. The sound of pen on paper seemed louder than usual.
The test began with controlled cold in one hand, slight position changes, and continuous recording of temperature, pulse, blood pressure, and referred pain. It was not a spectacular scene. That was precisely why it was difficult. Waiting turned every second into something heavy.
Lin Xuan looked at the data and at Qingxue's face with equal frequency.
He was not searching only for numbers; he was searching for the instant when the person ceased to own her expression. At six minutes, her fingers began to cool. At seven, jaw tension appeared. At eight, Qingxue closed her eyes, not from unbearable pain, but to focus on not retreating.
"Pain scale,"
Zhang Min asked.
"Three,"
she answered.
Lin Xuan did not fully believe it.
"Honestly, Miss Gu."
She opened her eyes.
"Four and a half."
Gu Yalan turned her head toward him, surprised that he could obtain more truth with one sentence than others could with family authority.
The system displayed possible routes, but Lin Xuan did not allow the mental screen to drag him along.
He had written the protocol in order to obey it, not to improvise heroism. At nine minutes, the temperature curve fell one point faster than expected.
"First intervention,"
he ordered. Gradual warmth, guided breathing, planned microdose. The sequence responded, but did not disappear. That was what they wanted: reduce damage without erasing the signature of the phenomenon.
Qingxue clenched the sheet with one hand.
Lin Xuan leaned in.
"Look at me. Breathe with me. Do not fight the cold; just tell me where it changes."
"Wrist,"
she said with difficulty.
"Now up the forearm."
Zhang Min wrote. Zhao adjusted the equipment.
Gu Yalan remained motionless, but her fingers on her bag were white.
At twelve minutes, Lin Xuan stopped the test. Not because it had failed, but because they had reached the useful limit. The closing intervention worked in phases. Pain retreated, then jaw pressure, and finally the temperature began to recover slowly.
No one applauded.
No one sighed theatrically. Exhaustion filled the room like low fog.
Qingxue took time to release the sheet.
When she did, red marks remained on her palm.
"You learned something,"
she said, more statement than question.
"Yes."
"Enough to justify this?"
Lin Xuan felt everyone waiting for a certain answer.
He did not give one.
"Enough not to repeat it the same way. Enough to design the next step with less harm. Not enough to promise you a cure."
Qingxue closed her eyes.
"Then it was an honest afternoon."
Afterward, in the analysis room, the curves revealed what the night of the crisis had suggested. There was a measurable peripheral sequence, a disproportionate autonomic reaction, and a brief window in which to intervene without erasing the pattern. Bai Yuchen, connected by video call from her institute, appeared on the screen with her hair tied back and an alert expression despite the hour.
"This is not a simple vascular response,"
she said.
"There is inflammatory memory. The body learned a wrong route."
Lin Xuan nodded.
"And perhaps we can teach it another before cutting anything."
The word cut hung in the air.
He did not fear it.
He was a surgeon.
But each day he understood more that the best surgery was not the one that solved the doctor's impatience, but the one that arrived when the body had no better path left.
At the end of the day, Gu Yalan approached Lin Xuan in the corridor.
"I did not enjoy watching you make my niece suffer today,"
she said.
"Neither did I."
"But I understand why she did not want to stop. That does not mean I fully trust you."
"You should not. Full trust in a doctor is dangerous. Trust the data, the limits, and your niece's capacity to decide."
The woman in the ivory suit looked at him with a mixture of irritation and respect.
"You speak like someone older than you are."
"I work with people who die if I learn too slowly."
That night, when Lin Xuan opened the system summary, he found a quiet reward: progress in the Celestial Map, considerable medical EXP, Merit Funds for a validated protocol.
He did not smile.
He thought of the marks on Qingxue's palm and wrote in his notebook: every piece of data has a cost; paying less is part of treatment.
The day after the test was more revealing than the test itself.
Qingxue did not suffer a severe relapse, but fatigue left her quiet, as if every word had to climb stairs before leaving.
Lin Xuan adjusted the follow-up so that partial victory would not become an excuse for excess.
Gu Yalan watched from a chair, less hostile than before, though no less dangerous.
"Yesterday you proved you can stop,"
she said.
"That should not be surprising."
"In ambitious doctors, it is."
Lin Xuan accepted the blow without defending himself. Ambition, even when born from saving lives, could become a kind of deafness.
Bai Yuchen sent a preliminary analysis with graphs that looked like small mountains.
She proposed comparing Qingxue's pattern with international archives of rare syndromes and requested permission to anonymize data.
Lin Xuan brought the proposal directly to Qingxue. Not to her assistant, not to her aunt.
She read the request and asked,
"Would it help other patients or only publish something interesting?"
"It could do both."
"Then write the part that helps first. After that we will discuss the interesting part."
Lin Xuan felt respect before admiration. There was an ethical hardness in her that did not need a white coat.
The team spent the afternoon adjusting the new protocol.
Zhang Min argued intervals.
Zhao Linger insisted on subjective scales.
Mu Qingli questioned the safety of repeating stimuli.
Director Liang asked that everything be ready for audit. The meeting room became uncomfortable, but alive. It was no longer Lin Xuan against a wall of doubt. It was a team fighting the problem from different angles. That difference mattered. Solitary medicine could produce genius; it could also produce errors no one saw in time.
Lin Xuan began to understand that even the Celestial Medical Dao needed human witnesses around it.
In the end, Qingxue received the updated summary.
She read to the last line and then asked for a pen.
She added her own note to the consent: "I agree to continue as long as my subjective perception is treated as data, not decoration."
Gu Yalan looked at the line and, for the first time, truly smiled, if only slightly.
Lin Xuan kept a copy. That sentence was worth as much as any curve. The patient others wanted to protect in silence had claimed a place inside the method.
That night, when the system increased his comprehension of the Celestial Map, Lin Xuan felt the progress had not come from him alone. It had come from everyone who had forced the protocol to become more human.
That night, before closing the folder, Lin Xuan compared the test curves with a blank page intended for the next protocol. The empty page inspired more respect than the completed data. There he could still be wrong. There he could save future harm or create it through overconfidence.
He took the pen and first wrote a warning to himself: do not turn a good response into permission to push harder. Only then did he begin designing the next step, with the slowness of someone who understood that prudence could also be a form of courage.