Chapter 298: Unsaved Memory

The cursor blinked in the terminal. class MedicalSandbox: was followed by a colon. Lin Chen pressed Enter and indented four spaces. He didn’t rush to write methods; instead, he defined the initialization parameters first: gpu_queue, memory_limit, encryption_algo, auto_destroy_flag. The cold glow of the screen reflected on his retinas like a thin layer of frost. Beneath the desk, his left foot twitched lightly, a numbness creeping up his calf. He adjusted his posture, shifting his full weight onto his right leg, the chair’s casters emitting a faint friction sound.

The core of the sandbox wasn’t isolation; it was destruction. DICOM headers in medical imaging hid too much metadata—patient names, ID numbers, equipment serial numbers. Missing even a single field could trigger a one-vote veto in a compliance audit. He pulled up the test logs that had run successfully the night before, verifying the memory allocation logic line by line. def process_request(self, payload): He started with structural validation, stripping away sensitive header information and retaining only the pixel matrix and diagnostic descriptors. Before the data entered the GPU queue, it was forcibly converted into an AES-256 encrypted temporary tensor. Once inference finished and the confidence score was output, it triggered _clear_memory(). No disk writes, no cache drops, not even the swap partition was left unlocked. The code progressed line by line, the rhythmic tapping of the keyboard sounding monotonous and steady in the empty conference room. He didn’t need inspiration; he just needed to translate the architecture diagram he’d sketched in his mistake notebook into instructions a machine could execute.

Outside, the sound of traffic gradually thickened. The exhaust fumes of the morning rush seeped through the AC’s fresh air system, mingling with the lingering cold scent of coffee in the room. Lin Chen stopped typing and rubbed the space between his eyebrows. A sharp, needle-like pain shot through his left ankle, as if a fine pin were stirring in the bone seams. He looked down; his shoelace had come undone. He bent to tie it, moving slowly, his fingertips feeling the swollen contour beneath the fabric. Ten years. From the dirt roads of Qingshi Village to the asphalt streets of the provincial capital, and now to the epoxy flooring of this office building, the foot injury had become the most honest gauge in his body. It reminded him that every upward climb exacts a toll at some joint. He tightened the lace, straightened up, and pulled his focus back to the screen.

His phone screen lit up. Su Man pushed the door open, carrying two Americanos. She set one beside his hand, pulled over a chair, and sat down. “I read Old Zhao’s letter of intent.” Her voice was flat, devoid of inflection. “The withdrawal isn’t a threat; it’s a stop-loss. He thinks the compliance costs in the medical track are too high and the cycle too long. It doesn’t fit his fund’s three-year exit IRR model. He’s crunched the numbers: our sandbox solution will eat up at least forty percent of the gross margin, and the payment cycle will stretch to nine months.”

Lin Chen didn’t answer. He picked up the paper cup and took a sip. The coffee was completely cold, its bitterness spreading along the root of his tongue. “What’s your take?” he asked.

Su Man leaned back against her chair, her gaze fixed on the terminal screen. “Technically, the sandbox works. But commercially, taking on the pilot will break our cash flow for three months. The delivery standards in the performance bet clause are hard metrics. Miss by a single point, and the final payment gets slashed by thirty percent. The cash we have on hand will only last until the end of the month. Server leases, bandwidth, payroll—they’re all settled monthly. Once the supply cuts off, the inference nodes halt, and our existing clients will follow.” She paused. “If we don’t take it, Old Zhao’s funding continues, but the product line gets locked into general-use scenarios. Zhao Qiming wants fast in, fast out. We want a moat. These two paths aren’t even on the same plane.”

Lin Chen set the cup down. His fingers unconsciously rubbed the hard cover of his mistake notebook. The cover was worn, the corners curled. He flipped to a fresh page, his pen hovering over the paper. “Option A: Reject the pilot. Retain Old Zhao’s funding. Safe, but the ceiling is visible. Option B: Accept the pilot. Bear cash flow pressure + performance bet risk. Gain Tier-3 hospital scenarios + compliance barriers. Cost: Short-term pain, team must withstand the pressure.” He wrote the two lines without hesitation. The pen scratched across the page, ink bleeding into the paper fibers. He looked up at Su Man. “Process Old Zhao’s withdrawal intent according to standard procedure. No attempts to retain him.”

Su Man’s eyes shifted slightly. She said nothing.

“I’ll sign the supplementary agreement for the medical pilot.” Lin Chen’s voice wasn’t loud, but every word landed with weight. “The sandbox deploys tonight. By 3 PM tomorrow, send the stress test report to the provincial medical consortium. We’ll break the delivery standards in the performance bet clause into three milestones. Month one: run-through at a single hospital. Month two: integrate three hospitals. Month three: compliance audit. We’ll cover the cash flow gap with existing SaaS subscription revenue. For any shortfall, I’ll mortgage my personal real estate.”

Su Man was silent for a few seconds. She looked at Lin Chen, as if studying a man who had already burned his bridges. “Are you sure?” she asked.

“Not sure,” Lin Chen replied. “But someone has to pay the trial-and-error cost first. Old Zhao’s logic is capital return. Ours is scenario rooting. Medical data isn’t traffic; it’s trust. Once trust is established, the migration cost is extremely high. If we retreat now, we’ll never get back in.”

He turned back to the screen and resumed coding. def _clear_memory(self): He called the low-level API, forcibly released the GPU VRAM, overwrote the memory blocks, and finally triggered garbage collection. A progress bar advanced slowly in the terminal. The test script began to run. The first batch of simulated requests was injected into the sandbox. The log window scrolled: [INFO] Payload encrypted. [INFO] Inference started. [INFO] Confidence: 0.89. [INFO] Memory cleared. [INFO] Request destroyed. No errors. No residue. Lin Chen leaned back in his chair and exhaled a long breath. His left foot still ached, but his heartbeat was steady. He knew the technical closed-loop was only the first step. The real hard battle would begin the moment the contract was stamped.

2:40 PM. Sandbox deployment complete. Lin Chen packaged the test report, attached the receipt for the supplementary agreement, and prepared to send it to the contact at the provincial medical consortium. The email client had just opened when his phone suddenly vibrated. Not WeChat. An unknown number. Area code 028. The provincial health commission’s dedicated line.

He answered. There were no pleasantries on the other end, only urgent background noise and one clear sentence: “Mr. Lin, the pilot list has been temporarily adjusted. The data interface for Provincial Second Hospital is opening early, but it requires joint debugging to be completed by 8 PM tonight. Additionally, the audit team will bring in a third-party security agency tomorrow for penetration testing. You have exactly eighteen hours left.”

The call ended. The dial tone echoed in the receiver.

Lin Chen set the phone down. The screen went dark. He glanced at the terminal; the sandbox logs were still scrolling quietly. He stood up. As his left foot hit the floor, the pain was sharp and concrete. He walked to the whiteboard, picked up a black marker, and drew a heavy arrow after “Sandbox Deployment.” The arrow pointed into a blank space. He wrote: “Joint debugging. Penetration test. 18 hours.”

The pen paused. Outside, the clouds hung low. The wind hadn’t risen yet, but the air pressure had already shifted. He opened his mistake notebook and wrote on a fresh page: “Medical dedicated line passthrough event - closed. Sandbox solution pending deployment. 10x data volume + performance bet clause. Risk and return in sync. Joint debugging countdown: 17:52.” He closed the notebook, picked up his jacket. The corridor’s motion-sensor lights flickered on in sequence, casting his slightly limping shadow against the wall. The elevator descended, the floor numbers jumping downward. He knew there was no retreat tonight. Only code, logs, and a commitment that had to be delivered on time.