Chapter 219: Thresholds and the Early Shift

Five in the morning. By the third buzz of the alarm, Lin Chen was already awake. There was no buffer period; his brain was like a cold-booted server, instantly loading the day’s tasks into its queue.

He threw off the thin blanket. When his left foot touched the floor, the familiar stiffness tugged at his Achilles tendon. Bracing himself on the edge of the bed, he straightened up, shifted his weight onto his right leg, and made his way slowly to the desk. The power light on the laptop was still on; last night’s Docker container was suspended. He pressed the space bar, and the screen lit up with a dim blue glow. The terminal window popped open. He typed in a command and launched the stress-testing script.

Five hundred thousand entries were split into ten batches and fed one by one into the anonymization engine. The progress bar crept upward. CPU usage held steady at 65 percent, while the memory curve began to rise in the third minute. Lin Chen stared at the monitoring panel, fingers hovering over the keyboard. Memory leak. The old problem. Under high-frequency writes, the V3.0 logging module was failing to release file handles in time, causing the buffer to pile up.

He did not sigh. He switched straight back to the code editor. He located log_handler.py, changed synchronous writes to an asynchronous queue, increased the flush frequency, and set a maximum queue length. Save, restart the container, rerun the batch. The progress bar advanced again. At its peak, the memory curve flattened out, then dropped back into the safe threshold. Estimated runtime fell from forty-two minutes to thirty-eight. Error rate: 4.1%.

Good enough. He closed the terminal, opened Excel, and filled in the table with the cleaning rules, exception types, and processing time. Reality had no miracles, only arithmetic. What you subtracted was redundant code; what you added was room for fault tolerance.

Seven twenty. He shut the laptop and packed it into his backpack. From the drawer he took out the pill case, the health insurance card, and Xiaoman’s medical file booklet. He pulled on his thick-soled sneakers over his left foot and tied the laces tight. Out the door, lock the door. In the hallway, the motion-sensor lights came on one by one with the sound of his footsteps, then went dark behind him.

The early winter air was dry and cold. He walked to the subway station, his stride shorter than usual, his right leg supplying most of the push. There were not many people in the car. He found a corner seat by the door and set his backpack on his lap. His phone screen lit up with a push notification from the banking app: the fixed-term deposit had been withdrawn, principal and interest totaling 2,861.4 yuan had been transferred into the hospital prepayment account. Outstanding balance status removed. He took a screenshot and saved it in the folder labeled “Medical Expenses.” His finger paused over the screen for a second, then he locked it. Money was only numbers, but medicine could not be interrupted.

Eight ten. The corridor outside the neurology outpatient clinic. The smell of disinfectant mixed with the stale odor of old vinyl flooring. The number board displayed: Lin Xing, 8:30, EEG Room 1. He sat on a row of plastic chairs, spread the medical booklet over his knees, and flipped to the latest page. The doctor’s instructions from last time read: “Avoid fatigue, take medication regularly, follow-up in three months.” He took out a pen and added a line in the blank space: "11.14 Follow-up EEG. Results pending."

Eight twenty-five. The nurse pushed open the door and called Xiaoman’s name. Lin Chen stood and guided him inside with a hand on his shoulder. His little brother was light, the patient gown hanging loose on him. The machine in the EEG room hummed as the nurse attached electrodes to Xiaoman’s scalp and applied conductive gel. Xiaoman did not move; he only kept his eyes fixed on the vent in the ceiling. Lin Chen stood outside the glass window, watching his brother’s quiet profile. The monitor’s waveform rose and fell across the screen like a slow-moving river.

Leaning against the wall, he took out his phone. A message from Chen Hao popped up: "Legal added the data quality confirmation letter to the appendix. President Wu added one more thing at the last minute—they want to see the real-time logs of the underlying data flow during the meeting, not just the dashboard. Get ready."

Lin Chen stared at the line of text. Underlying logs meant opening up part of the terminal permissions. More risk, but also a chance to show the real technical foundation. He replied: "Got it. I’ll prepare a sandbox environment with read-only permissions. Log anonymization level will be set to the highest standard."

Sent. He put away his phone and kept watching the waveforms on the screen. Forty minutes later, the examination ended. The doctor came out with the report, his tone steady. “The discharge frequency is lower than last time, but there are still scattered sharp waves in the temporal lobe region. He can’t stop the medication, and his schedule needs to stay regular. How has the child been sleeping lately?”

“Not bad,” Lin Chen said. “Asleep before eleven every night.”

“The adult needs to be careful too.” The doctor glanced at him, his gaze lingering for half a second on Lin Chen’s slight limp. “If the caregiver goes down, the patient’s situation gets even worse. Don’t try to tough it out.”

Lin Chen nodded but said nothing. He took the report, folded it, and slipped it into the document pouch. Supporting Xiaoman, he walked out of the department. By now the sunlight was slanting into the corridor, falling across the terrazzo floor and cutting it into stark squares of light and shadow. He felt in his pocket. The cigarette pack was still empty. He did not need cigarettes. What he needed was to keep the next step steady.

Ten forty. Back at the temporary rental apartment. He boiled water and made a bowl of instant noodles, adding two sausage links. Sitting in front of the computer, he ate while revising the presentation PPT. He deleted every word like “empowerment,” “ecosystem,” and “disruption,” leaving only three slides: core metrics comparison, data flow architecture diagram, and cost estimate sheet. Technology did not need packaging. It only needed to be verifiable.

He generated the access link for the sandbox environment, set the IP whitelist and read-only permissions, and tested connectivity. Latency: 12 ms. Normal.

One in the afternoon. He changed into a clean shirt and packed the laptop, presentation flash drive, draft contract, and EEG report into his briefcase. When his left foot touched the ground, the pain had already dulled into a constant soreness and pressure. He adjusted his breathing and shifted his center of gravity forward. Out the door, into a cab.

One forty. He arrived in the office tower lobby. The glass curtain wall reflected a cold white light. He tapped his card at the turnstile and took the elevator up to the twenty-eighth floor. The carpet in the corridor was thick enough to swallow footsteps. He walked to the meeting room door and pushed it open. Two people were already seated across the long table: President Wu and his assistant. Chen Hao was nowhere in sight, probably still downstairs waiting.

Lin Chen connected his computer to the projector and powered it on. The screen lit up, the desktop a default blue. He opened the terminal and entered the startup command. The sandbox environment loaded. The log stream began to scroll.

President Wu said nothing, only watched the screen. The assistant handed over a document. “President Lin, this is the first draft of the third-party security assessment. They said the formal report will be out tomorrow, but you can review the core conclusions first.”

Lin Chen took the file and skimmed through it quickly. Vulnerability scanning, penetration testing, data anonymization compliance. The conclusion read: “Compliant with Level 2 classified protection requirements; recommended remediation for two medium-risk configurations.” He looked up. “The medium-risk items are unauthorized access on the logging interface?”

“Right. Token verification has already been added,” the assistant said.

“Good.” Lin Chen set the file down on the table. “During the demo, all external interfaces stay closed. Traffic goes through the internal network only. As for the data quality confirmation letter, settlement will be based on the actual number of cleaned records. Rework caused by dirty data will not count toward Party B’s billable hours. Put that into the contract appendix and have both sides sign it.”

President Wu finally spoke, his voice low. “I’ve reviewed your technical foundation. But capital looks at certainty of delivery. Five hundred thousand records—if latency exceeds the threshold after launch, or if a data leak occurs, who takes responsibility?”

“It’s written in the contract,” Lin Chen said. “The SLA guarantees 99.5 percent availability. Anything beyond that reduces the service fee by the day. In the event of a data leak, Party B bears full legal responsibility. But that is on the premise that the data source provided by Party A meets the standards in the confirmation letter. If the source is poisoned, the cleaning engine can only raise an alarm—it can’t take the blame.”

The meeting room was quiet for several seconds. President Wu nodded and did not press further. He turned to his assistant. “Go through the clauses. If there’s no problem, sign it.”

Lin Chen watched the log stream on the screen. Lines of green characters scrolled past like a heartbeat. He knew this was only the beginning. Once the contract was signed, money would come in, servers would need scaling up, the team would need hiring, Xiaoman’s medicine could not be interrupted, and the next iteration would have to keep pace. Every step was on a tightrope, but beneath the tightrope was solid ground.

He closed the laptop and slipped the flash drive back into his bag. His phone vibrated. A notification from the hospital system: "Patient Lin Xing’s EEG report has been archived. Please collect the paper copy at the outpatient nursing station."

He stood and shook hands with President Wu. Firm, but not too firm. Two seconds. Then he turned and walked out of the meeting room.

As the elevator descended, he leaned against the wall of the car and closed his eyes. His left foot throbbed dully, and the aftertaste of instant noodles sat in his stomach. But in his head, he was already scheduling the next steps: server cutover tomorrow, channel partner integration the day after, seasonal clothes for Xiaoman the day after that. The calendar was packed, but the logic was clear.

His phone vibrated again. A message from Chen Hao: "President Wu just left. He’s very satisfied with the sandbox environment. But finance is holding up an advance payment—they say they need an additional declaration of independent intellectual property rights for the core algorithm. Do you have the software copyright certificate on hand?"

Lin Chen stared at the line. The application cycle for software copyright was two months; all he had was the acceptance notice. If the advance payment was held up, cash flow would break for three days.

He walked out of the building, early winter wind cutting across his face. Taking out his phone, he replied: "The acceptance notice has already been issued and carries equivalent legal effect. What finance wants is compliance backing, not the certificate itself. By ten tomorrow morning, I’ll package the acceptance document, the code commit records, and the first draft of the third-party testing report and send them to you. The advance payment must proceed on the original schedule, or the demo environment cannot be delivered on time."

Sent. He flagged down a taxi and gave the hospital address. Outside the window, the street scene slid backward like film under fast-forward. He opened his mistake notebook, and the tip of his pen scratched softly across the page.

"Article 219: Delivery is not the finish line; it is the starting point of trust. The software copyright can wait; cash flow cannot break. The bottom line is compliance, and the bargaining chip is certainty. Next steps: complete the intellectual property documents, verify the advance payment schedule, prepare the server cutover contingency plan."

He closed the notebook. The taxi turned into the hospital access road. He knew there would be new checkpoints tomorrow. But tonight, all he needed to do was elevate his left foot and get six hours of sleep.