Chapter 176: Error and Margin

The conference room’s air conditioner was set far too low, dry cold air pouring from the vent. Lin Chen set the shockproof case on the long meeting table, and the snap of the metal latches sounded especially sharp in the quiet room. He undid the straps, took out the bound report and the USB drive, and pushed them to the center of the table. Static clung to the paper; the edges curled slightly.

The expert in the dark jacket was surnamed Zhou, an engineer from the Provincial Institute of Metrology. He put on his reading glasses, opened the ledger, and ran his fingertip down the printed logs line by line. Lin Chen stood beside the table, his right leg bent slightly, shifting his weight onto the old injury in his left heel. His sock inside his shoe was already soaked with cold sweat. The swelling around his ankle felt like a piece of red-hot iron, searing his skin through the fabric. Without letting it show, he adjusted his breathing and fixed his eyes on the clock on the wall.

A quarter past nine.

“The L2 phase line is offset by twelve milliseconds.” Engineer Zhou looked up, his gaze moving from the ledger to Lin Chen’s face. “Did you manually alter the terminal’s underlying clock register?”

“Yes.” Lin Chen’s voice stayed level. “At the moment of power loss, harmonic interference was injected through the UPS bypass, which caused accumulated crystal oscillator error. I didn’t reboot the system. I wrote in a compensation value through a hotfix. The original logs and the hexadecimal modification records are all in Appendix Three.”

Engineer Zhou said nothing and turned to the appendix. Beside him, a young technician opened a laptop and imported the CSV files from the USB drive into the calibration software. The progress bar crept slowly forward. In the conference room, the only sounds were mouse clicks and keyboard taps. Lin Chen lowered his eyes and looked at the edges of his fingernails, still stained with machine oil. The cuts on his fingertips had already scabbed over, but they still throbbed faintly whenever they touched anything hard. He slipped his hands into his coat pockets, his fingers brushing against a half-crushed pack of bandages.

A green prompt box popped up on the screen:

[CALIBRATION PASSED] Data integrity: 99.87%. Phase drift compensated. Timestamp alignment: OK.

Engineer Zhou took off his glasses and rubbed the bridge of his nose. “Integrity got stuck at ninety-nine point eight seven, so we docked zero point one three. But the phase compensation logic is written cleanly—no back doors left behind. Getting this level of precision out of the factory’s old equipment wasn’t easy.” He closed the report, pulled out an acceptance form from his briefcase, signed it, and stamped it. “The final payment will proceed according to the contract and arrive within three working days. Leave us a photocopy of the hardware retrofit list. The provincial institute needs it for the record.”

Lin Chen took the acceptance form. The edge of the paper was sharp. He nodded. “Thank you, Engineer Zhou.”

Old Chen smiled ingratiatingly from the side and offered a cigarette, but Zhou waved it away. The group packed up and left. When the conference room door shut, it cut off the sound of footsteps in the hallway. Lin Chen leaned back in the chair and let out a long breath. The numbness in his left foot began to recede, replaced by a sharp, needle-pricking pain. He slowly crouched down and untied his shoelaces. His ankle was swollen till it gleamed, the skin stretched so tight it was almost translucent. From the bottom layer of the shockproof case, he pulled out a Yunnan Baiyao spray and gave it two bursts. The pungent medicinal smell mixed with machine oil and spread through the over-air-conditioned room.

His phone vibrated.

A bank text message:

[XX Bank] A transfer of RMB 6,400.00 was completed to your account ending in 7392 at 10:12 on September 14. Balance: RMB 7,135.30.

He stared at the numbers on the screen. He didn’t smile, and he didn’t feel relieved. Six thousand four hundred. After hardware costs, painkillers, and his younger brother’s sodium valproate for next month, a little over two thousand would be left. Enough to cover next semester’s dorm fee. Enough to buy two original algorithm textbooks. Enough to stay overnight at an internet café to look up materials. But not enough for a hard-seat train ticket to Shenzhen. Not enough to rent a single room in an urban village with one month’s rent and three months’ deposit up front. He locked the screen and shoved the phone back into his pocket. Numbers were only numbers. Only once they landed in the ledger did they become life.

He put his shoe back on and tightened the laces. He moved slowly, as if completing some kind of ritual.

When he walked out through the factory gates, the sunlight was blinding. The September wind already carried a chill. It blew against his sweat-damp back and raised a layer of gooseflesh. At a roadside newsstand, he bought a bottle of ice-cold mineral water, twisted off the cap, and tipped half of it down in one go. The cold water slid down his throat and pressed down the hollow feeling in his stomach.

The bus ride back to school would take forty minutes. He sat in the last row, holding the shockproof case in his arms. The bus was thick with the smell of sweat and cheap perfume, while the conductor called out the stops in dialect. Lin Chen closed his eyes and ran through today’s code logic in his head—the register mapping for the hotfix, the algorithm for phase compensation, and the exception handling module in the V3.1 script that still hadn’t been fully sealed off. On an industrial site, theory meant nothing. Only results counted. If it didn’t run, it was scrap metal. If it ran, it was money. He reached into his pocket and touched the photocopy of the acceptance form. The paper had already been warmed by his body heat.

Outside the bus window, the streets flew backward. The arcade buildings of the old district, the newly paved asphalt roads, the layers of ads pasted on utility poles offering fake certificates—frame after frame, like skipped lines of code. He knew he was still only halfway up the mountain. The provincial metrology project was just a stepping stone. The real threshold lay much farther away. The people who walked in carrying reports and standards did not care how many sleepless nights you could endure. They cared how small you could force the error to be, and how much margin you could still leave yourself.

His phone vibrated again.

This time it wasn’t a text. It was an email notification.

He opened his eyes and unlocked the screen.

Sender: zhou.prof@univ.edu.cn Subject: 【Recommendation】Internal Referral for Technical Intern at an Internet Company in Shenzhen - Deadline September 20

The body was brief:

“Lin Chen, I’ve reviewed the feedback from the Provincial Institute of Metrology project. Your low-level logic is solid, and you can handle field pressure. Attached are the referral link and the job description. Submit your résumé and GitHub repository by next Wednesday. You only get one shot. Weigh it carefully.”

He stared at the screen, his thumb hovering above the delete key. The bus swayed, and the announcement of the next stop blurred into background noise. The dull ache in his left foot inside his shoe reminded him of the weight of reality. He pressed the lock button and slipped the phone back into his pocket. Outside, the streets kept sliding backward like a green-painted train with no terminus. He knew that some things could no longer be earned just by sitting in a workshop changing registers.

The bus reached the stop. Cradling the shockproof case, he stood up. His right foot touched the ground first; his left hovered in the air for half a second before slowly settling down. The steps were high. Holding the rail, he edged his way down one at a time. On the billboard at the stop was a recruitment poster for a major internet company, white letters on a blue background:

“Change the world, starting with a single line of code.”

He glanced at it without stopping and walked straight toward the school gate.

Two overdue payment notices and a registered letter had been stuffed into the mailbox downstairs from the dorm. He opened the registered letter. It was from the village committee back home. Inside was only a single sheet of paper: a notice for the new rural cooperative medical insurance payment, deadline October 15. He folded it and slipped it into the inner compartment of the shockproof case. The key went into the lock, turned, and the door opened.

The room smelled of old books and mothballs. He set the case on the desk and turned on the computer. The screen lit up, the browser still open to his GitHub repository page.

He created a new folder and named it shenzhen_intern.

The mouse pointer paused in the blank space for a few seconds.

Outside the window came the ring of a bicycle bell. From far away, the cafeteria loudspeaker was broadcasting the noon news.

He typed the first line of code.

His fingertips landed on the keyboard lightly, but steadily.