Chapter 209: Signatures and the Return Path

When dawn neared in San Francisco, Lin Chen was the only person left in the hotel business center. Three receipts lay beside the fax machine, their edges curled and their ink still faintly damp. He spread them out in order: medication informed consent, blood drug concentration monitoring, MRI appointment confirmation. Each page had Wang Guiying’s crooked signature in the lower right corner, and each had his electronic authorization sent back from overseas.

He photographed them one by one, saved them to the cloud drive, and sent them to the county hospital nurses’ station: “Please keep the paper originals with the medical record. I have archived the electronic authorization. For later self-paid items, send the fee breakdown first.”

The attending physician soon replied by voice. “Mr. Lin, tonight’s episode was a typical tonic-clonic seizure. The EEG suggests abnormal discharge in the temporal lobe. Long-term medication remains the foundation, but frequent seizures can accelerate neuronal damage. The MRI is scheduled for next Wednesday. If the lesion is clear, a provincial minimally invasive evaluation may be considered. Imported antiepileptic medication has to go through the special-drug channel; reimbursement is low, so the early stage will require self-payment.”

Lin Chen held the voice button. “If rash or elevated transaminases appear during medication, what is the plan?”

“Liver function every three days. If abnormal, switch to a second-line drug immediately,” the doctor said. “Your brother’s constitution is sensitive, so dose adjustment has to be slow.”

“Understood. No blind increase before MRI results.”

After sending the message, he switched back to his laptop. The document title was already created: AI Inference Service Full Deployment and Performance Optimization Plan V1.2. The skeleton he had built in the hotel room the previous night was still there. Now it needed flesh. Raising throughput by 20% and pushing the error rate below 1% could not be solved by stacking more machines. The company’s current GPU scheduling was crude; memory fragmentation was severe; data preprocessing and model inference were coupled together, creating an obvious I/O bottleneck. He would split the architecture: an edge cache layer writing to SSD; async queues replacing synchronous blocking; model weights quantized from FP32 to INT8; and, above all, standardized input fields from the third-party labeling platform—otherwise dirty data would consume every optimization.

He knew these technical paths well, but when writing them into the plan, he deliberately preserved safety thresholds. Cache hit-rate target: 85%, not 90%. Quantization precision loss: “requires business-side A/B testing confirmation.” Clinically high-risk samples: mandatory manual review, not swallowed by KPI pressure. Large companies wanted results, but they also needed controllable risk. He hid his real leverage inside executable details, not slogans.

At 3:20 Beijing time, the document stopped at more than fourteen thousand words. Lin Chen exported the PDF, attached the architecture diagram and pressure-test estimate table, and addressed the email to Director Li, copying the VP and the architecture group lead. The subject line was only one sentence: “Full deployment plan and performance optimization path, for review.”

He clicked Send. The progress bar completed, and the screen dimmed.

Almost in the same second, his mother’s video call came in. Lin Chen answered. The screen shook several times before finally aiming at the glass outside the monitoring room. Xiaoman lay on the bed, dried blood at the corner of his mouth, nasal tube taped to his face, the green line of the cardiac monitor rising and falling regularly. Wang Guiying sat on the corridor bench, eyes swollen red, voice very low. “The doctor says he’s stable for now. Your father is downstairs paying. There’s... a little over two thousand left on the card.”

Lin Chen looked at his mother on the screen. His fingers unconsciously pressed his left ankle. It had begun to throb again, but that was nothing beside the bed on the other side of the glass.

“Mom, don’t go far today,” he said. “If the nurses ask for any signature, photograph it first. After Dad pays, have him photograph the receipts. If Xiaoman wakes up, don’t rush to give him water. Listen to the nurse.”

Wang Guiying nodded, as if she had finally found a rope to hold.

After the call, Lin Chen opened the banking app. The balance was still 4217.6 yuan. The county hospital’s new fee breakdown had already lined up: enhanced MRI, blood drug concentration, liver and kidney function, imported drug advance payment. Initial total: about fifteen thousand. Gap: at least six thousand.

He opened his mistake notebook and wrote on a fresh page:

“Variables: performance-bet binding / cash-flow rupture / rigid medical spending. Solution: do not sign long-term bet. Exchange project delivery for bonus and transition credit; run MVP on compliant external node. Risks: social-insurance gap / Old Zhao node stability / hospital fees front-loaded. Bottom line: lock first compliant compute within 48 hours; no high-interest borrowing; no gray business.”

The pen cut heavily enough to roughen the paper.

His phone lit up. Director Li’s WeChat message: “Plan received. Architecture group is evaluating. VP approves the optimization path. Monday 10 a.m., Conference Room A3. Bring the agreement. Legal has finalized it.”

Lin Chen stared at “Conference Room A3” and slowly exhaled. He was in San Francisco; he could not physically sit inside Beijing’s A3 room on Monday. More importantly, he would not pledge the next half year to a bet that pushed every risk downstream.

He replied: “I’ll join Monday by overseas video. I’m responsible for the plan and pressure-test data. The agreement requires clause-by-clause review with legal and personal terms; I will not make an on-site commitment to a binding cycle.”

Send. No extra explanation.

Outside the window, dawn began to gray. San Francisco’s morning carried a damp chill from the sea, and a thin mist floated over the hotel glass. Lin Chen stood and washed his face with cold water at the business center sink. The man in the mirror had sunken eyes and blue stubble, but his gaze was still.

At seven Beijing time, the nurse’s round photo arrived: Xiaoman’s oxygen saturation was 93. Seven points above the lowest reading. In medicine, it was only temporary stability. To him, it was a marking.

Immediately after, the pharmacy system sent a notice: “Imported valproate sustained-release tablets require advance ordering. Payment confirmation needed before 4 p.m. tomorrow, otherwise medication may be interrupted. Fee: 6,800 yuan. Please complete payment at the first-floor cashier.”

Balance: 4217.6. Gap: more than 2600. The project bonus had not been paid; Old Zhao’s node deposit could not be moved. Lin Chen could not leave his mother explaining herself again and again at the cashier window, nor could he let medication wait for corporate process.

He opened his contacts and found Lao Zhou, his university roommate, now working in risk control at a third-party payment company. Clean accounts, clean habits.

When the call connected, the other side still sounded half-asleep. “Hello?”

“Lao Zhou,” Lin Chen said quietly. “Lend me three thousand. Formal IOU. Interest at bank fixed-deposit rate. I’ll repay before the fifteenth of next month. Urgent.”

There was a two-second silence. “All right. Send the card number. Are you... doing okay lately?”

“I’m okay,” Lin Chen said. “Thanks.”

After hanging up, he wrote the borrowing purpose, repayment date, and interest into a message for Lao Zhou, then copied the same record into the mistake notebook. It was not sentimentality. It was boundary. Money could save an emergency, but it could not become a new gray debt.

At 7:30, the county hospital sent a screenshot of the transfer arrival. Wang Guiying followed with a cashier receipt: imported medication advance payment, 6,800 yuan, paid. Lin Chen archived the receipt and changed the spreadsheet balance to 417.6.

He leaned back. His left foot finally began to tremble. Outside, the city was fully awake; in Beijing, a new day had already begun. At Monday’s meeting, he would bring only the plan and his boundaries. The agreement would not be signed.

The next step had already been marked. It only needed the stroke of the pen.