Chapter 5 · Signal Hounds
Lu Yuan woke at the first buzz from the door lock.
It wasn’t the sound of a key sliding into the mechanism. It was the electronic lock’s emergency decoder, trying password combinations one by one—each wrong combination triggering a tiny electromagnetic pulse inside the lock cylinder, the pulses stacking into a low, almost subsonic vibration. Ordinary people couldn’t hear it. But Lu Yuan had spent two years in Huawei’s shielding hall, where the quietest moments made your own heartbeat sound like a drum. He’d learned to distinguish all abnormal sound frequencies.
The instant his eyes opened, his brain had already made the assessment: not a burglar. A burglar wouldn’t use equipment at this level. One of these decoders cost as much as they’d steal in three months. This was professional.
Lu Yuan threw off the covers. His bare feet hit the floor without a sound. His daughter lay beside him, her small body curled up, breathing steady. He covered her mouth with one hand and scooped her out of bed with the other. Her eyes flew open wide, fear flickering in the dark.
“Don’t make a sound,” he breathed.
A third buzz from outside—sharper now. The decoder had found the lock cylinder’s resonant frequency, making its final attempt. Lu Yuan had seen the disassembly diagrams for this type of device in his repair shop. He knew the decoder’s progress bar would reach five buzzes before the lock gave way.
He had only two buzzes left.
Emergency bag—the black nylon bag beside the bed, zipper always facing outward, always within arm’s reach. Inside: his daughter’s emergency medication, syringes, an offline backup of her medical history, three days of compressed biscuits, and two bottles of water. He checked it every night before sleep, a ritual bordering on compulsion. As he grabbed the bag, his other hand was already closing around the phone on the nightstand—he didn’t light up the screen, just held the power button down from memory until it shut off.
The fourth buzz. Longer. Louder. Inside the lock, the motor had started turning the release mechanism.
Lu Yuan didn’t head for the door. He headed for the window.
Second floor. Below it was the concrete alley behind his repair shop. He’d thrown garbage there during the day, knew the ground was littered with broken bricks and rusted metal racks. He’d calculated the impact height—about 2.8 meters. If he landed first and absorbed the shock, the damage to his ankles was acceptable.
The fifth buzz. The electronic lock gave a crisp click, followed by the metallic scrape of a door handle being pressed down.
Lu Yuan hit the window with his back. The aluminum frame buckled outward under the force. He lost his balance, falling backward with his daughter in his arms—and in midair, he twisted her body so her face pressed against his chest, taking the impact on his own back.
The landing came half a second later. The shock traveled from his heels to his knees to his lumbar spine like an iron rod being driven up through the soles of his feet. His left ankle emitted a brief crack—not a fracture, but a ligament overstretched past its limit, tearing like an overtaut rubber band suddenly snapping one strand. The pain climbed from his ankle up his calf and stopped at his clenched jaw.
He didn’t cry out.
From the apartment above came the sound of furniture being overturned. Not a careful search—a violent, purposeful ransacking. Drawers being yanked out and thrown to the floor. Cabinet doors kicked open. He heard voices, low, but the walls carried a muffled version:
“—not in the bedroom—” “—check the signal source—” “—terminal last pinged on this floor—” “—find the transmitter—”
Lu Yuan didn’t have time to hear more. He ran with his daughter down the back alley, every step on his left foot like stepping onto crushed glass, but he didn’t slow down. The narrow alley stretched ahead in the darkness, walls lined with air-conditioning units and rusted pipes, the sky above cut into a long gray-blue slit by the buildings on either side. A Starlink satellite was sliding silently through that slit.
Don’t let the satellites see you, he told himself. It wasn’t a joke. Starlink’s positioning system didn’t need optical tracking. It tracked your phone signal, your wearable devices, the RF signature of any active chip in your pocket.
He’d already turned off his phone.
But his daughter’schildren’s GPS watchwas still on. He’d never been able to bring himself to turn it off—what if she got lost? What if she had a seizure? It was his last psychological safety line as a single father. Now that line was becoming a rope dragging him toward a cage.
Lu Yuan stopped under a grimy streetlight signboard, set his daughter down, knelt on one knee and quickly unfastened the watch from her wrist. Tears were streaming down her face, but she made no sound—she had learned, somehow, never to cry out when her father was tense. This five-year-old child. Lu Yuan stuffed the watch into a hole at the bottom of a trash bin, then picked his daughter up again and plunged deeper into the alleys.
It was 5:45 AM in Dachong Village. The sky was caught between deep blue and pale gray. Shenzhen’s most crowded urban village was waking up—breakfast stall woks already steaming,环卫工人的扫帚friction地面producerustling声, a man in slippers yawned as he walked out of an alley to throw out the trash.
Lu Yuan melted into these early risers.
His pace was neither fast nor slow. He looked like an ordinary father heading out early, holding his drowsy daughter as he walked toward a bus stop. His left ankle screamed with every step, but he kept his stride even, his expression relaxed. His daughter lay against his shoulder, her small hands gripping his collar, not crying, not asking questions.
As they passed through the wet market, Lu Yuan noticed something that made his heart race.
A gray electric van was parked at the alley entrance. No markings on the body. The sun visors behind the windshield were all down, hiding the driver’s face. But the van’s position was too precise—it perfectly blocked the line of sight from both ends of the alley, and an inconspicuous antenna on the roof was rotating very slowly.
A portable signal detection array.
Lu Yuan didn’t look at the van a second time. He turned into a narrower alley, wound through several turns, and slipped into an old building with no house number.
The stairwell smelled of damp mold and last night’s cooking oil fumes. The handrail was almost completely rusted away. The cover of the electrical meter box on the wall had been pried off by someone, wires hanging out like exposed blood vessels. He climbed to the third floor and knocked on a wooden door whose paint was peeling in large patches.
The door opened a crack, revealing an elderly woman’s face—sixty-something, gray hair, reading glasses on her nose. She looked at Lu Yuan, then at the child in his arms. She asked no questions and opened the door.
“Come in. Don’t stand at the door.”
Auntie Chen was an old customer from his repair shop. Three years ago she’d had an old phone fixed, and later brought in neighbors’ phones occasionally. She’d lived in this building for thirty years—since before Dachong Village was surrounded by high-rises. Lu Yuan didn’t know who she really was. But she was the only person he could think of to trust at this moment.
“Someone’s after you,” Auntie Chen said. It wasn’t a question.
Lu Yuan nodded.
Auntie Chen didn’t press. She took a set of keys from a cabinet and picked one out: “Go down the back stairs. Through the underground garage. Exit on the south side. There’s a hotel there with no Starlink access. The owner’s named Zhou. Tell him Sister Chen sent you. He’ll give you a back room. Cash only.”
“Thank you,” Lu Yuan said. His voice was hoarser than he’d expected.
“Don’t thank me,” Auntie Chen said, pressing the key into his hand. “Stay alive first.”
The hotel was hidden at the end of the deepest alley in Dachong Village. No sign. No neon. The entrance was an ordinary gray steel door. If not for the yellowed “Rooms Available” note taped beside it, nobody would give it a second glance.
Lu Yuan knocked. A long wait. A middle-aged man in a sweaty undershirt finally pulled the door open a crack. He looked at Lu Yuan, then at the child in his arms, then his eyes fell on the cash in Lu Yuan’s hand.
“Sister Chen sent me. Need a back room.”
The middle-aged man—Zhou—said nothing. He took the cash, didn’t even count it, and stuffed it into his pocket. He stepped aside to let Lu Yuan in. The hallway was so narrow only one person could pass. Exposed pipes lined the walls, the plaster peeling from years of dampness. The room was at the end of the hall. No windows facing the street, only a tiny opening near the ceiling, facing the next building’s exterior wall. One bed. One table. One lightbulb.
No Starlink terminal. No WiFi. Not even a TV.
Lu Yuan laid his daughter on the bed. Her eyelashes were still wet, but she had stopped trembling. She sat on the edge of the bed, looked up at her father, and finally asked the question that had been stuck in her throat since they jumped out the window:
“Daddy, why are we running?”
Lu Yuan opened his mouth. His throat felt blocked. How could he answer? Because Daddy stole something he shouldn’t have? Because a company called Starlink is chasing us? Because he opened that plastic storage bin, pulled out the notebooks from seven years ago, and made a decision he’d thought he would never make?
“Daddy did something wrong,” he said finally. “Someone is looking for us. But Daddy will fix it.”
“Are they going to catch us?”
“No.”
“Promise?”
Lu Yuan paused. “I promise.”
His daughter held out her pinky. Lu Yuan hooked his finger with hers. They pinky-swore. He’d done this a hundred times—after they pinky-swore, she would believe anything. A five-year-old’s trust system was still simple. The pinky swear was the most authoritative authentication mechanism in that system.
He got her to sleep, then sat on the edge of the bed, turned off the light, leaving only the glow of his phone screen.
He stared at a phone number in his contacts that he had never called before. The status bar at the top of the screen read: No Starlink Signal. This hotel used terrestrial fiber—an old optical cable tapped in from underground, bypassing the Starlink gateway, not registering any terminal, generating no traceable link-layer data. What Zhou did here was not exactly a secret in the village. Few people knew about it. Enough.
Lu Yuan’s thumb hovered over the dial button. Farhan Malik. The last time he’d contacted this person was over three years ago. He’d been running his repair shop and encountered a Starlink firmware lock issue he couldn’t crack. He posted a help request on an old Huawei tech forum, and the next day received a reply from an anonymous account with a firmware patch attached. The code was clean, precise, the comments clearer than a textbook. After applying the patch, he sent a private thank-you message. The reply was a single line:
“No need to thank me. If you ever need real help, remember this number. Farhan.”
A string of digits followed.
Lu Yuan had kept the number all this time. He didn’t know why—maybe because of the confidence in that reply, a purely technical confidence he rarely saw in other people. Maybe because the person’s signature line had a sentence that made him feel a strange unease even back then:
“All protocols are written by people. Things written by people have vulnerabilities. Vulnerabilities can be changed.”
Lu Yuan pressed the dial button.
The phone rang twice. Someone picked up. The other end was silent, but Lu Yuan could hear a very low frequency ambient noise—like server room fans, picked up from a distance by the microphone.
“Farhan?”
“It’s me.”
The voice was deeper than he remembered, but still carried that casual texture, like someone who’d been expecting this call.
“I’m Lu Yuan. Huawei forum—three years ago—the firmware patch—”
“I know who you are.” Farhan cut him off. “Where are you now?”
Lu Yuan gave him the approximate location of the hotel. Farhan was silent for a few seconds.
“Silas’s people have already started sweeping that area. They have your signal fingerprint—not your phone IMEI, something at the RF level. Turning off your phone won’t help. They know your last known range.”
Lu Yuan’s grip on the phone tightened.
“But,” Farhan’s tone didn’t change, as if stating a prearranged fact, “you found a hotel with no Starlink access. That was the right move. It buys us some time.”
“You—know what I’ve been doing?”
“No. But Silas’s people are chasing you, which means you’ve done something worth chasing. In this era, people running from Starlink are usually not the bad guys.” Farhan paused. “Send your exact coordinates to this number—not from your phone. Find a pay phone downstairs. Use coins. Dial a number. I’ll give you an address.”
“What address?”
“A place where Silas’s signal hounds can’t find you.”
Signal hounds. Lu Yuan heard the term for the first time, but he understood its meaning immediately—the steerable antenna arrays in those gray vans, the detection devices rotating silently at alley entrances in the early morning, the things that turned every city’s sky into an invisible web. They weren’t ordinary surveillance equipment. They were Starlink Security’s specialized tools, designed to track those trying to escape Starlink’s net.
“Why are you helping me?” Lu Yuan asked. He wasn’t sure if this question should have come earlier, or if he should have asked it at all.
Farhan was silent on the other end. Not hesitation. More like choosing his words.
“Because three years ago, the firmware issue you asked about—that lock problem—I deliberately left that test entry point in the firmware. You were the first person to find it. And the only one who didn’t use it to do something bad. You just fixed your own phone, said thank you, and walked away.”
Lu Yuan’s breath caught.
“So I owe you an explanation,” Farhan said. “But now isn’t the time. The pay phone downstairs—green one, to the right of the entrance. Use coins. Dial 139****8024. When they answer, say my name. They’ll tell you what to do next.”
The line went dead.
Lu Yuan put the phone in his pocket and looked at his sleeping daughter. He couldn’t leave her here alone, and he couldn’t take her out into danger. He stood by the bed for five seconds, then made a decision. He took off his jacket, wrapped it around his daughter, and picked her up again.
He wasn’t going to leave her anywhere alone again.
The green pay phone was to the right of the hotel entrance. Lu Yuan dialed the number with a coin. It connected. He said “Farhan.” The other end didn’t answer, just hung up. Three seconds later, he received a text message from an unknown number, containing only an address:
“Nanshan District, Science Park South Road 318 · Basement B3 · Elevator needs key — key is in magnetic box at the bottom of the fire hose cabinet to the left of the entrance.”
Lu Yuan memorized the address, deleted the message, and walked out into Shenzhen’s early morning with his daughter in his arms.
The city was just waking up. The streets were gradually filling with people—commuters, parents taking kids to school, people queuing at breakfast stalls. They didn’t know that above them, Starlink satellites were passing at seven kilometers per second, one by one fading into the morning light. They didn’t know that among the countless signals in this city, a few were being tracked by gray hounds. They didn’t know that a father holding his child had just closed one door and walked into a world utterly foreign to him.
An old white electric car glided silently to the curb across from the hotel. The window rolled down, revealing a young face. He looked about twenty-five, wearing a faded hoodie, hair slightly messy. But the way his eyes swept the street gave Lu Yuan a jolt of tension he hadn’t felt in a long time—a scanning, systematic alertness, like a living piece of software processing visual data in real time.
Farhan Malik.
He looked at Lu Yuan, then at the child in his arms, and nodded.
“Get in.”
