There's a rule we tower crane operators pass down to one another: if you're working at height and you hear someone whistling on the cable, don't lift anything that day.
The first time I heard Old Wei say it, I figured he was just a superstitious man. Until that evening, when I watched a fifty-meter crane swing its jib around by itself...
Old Wei was the most senior crane operator on our site.
"Old" didn't really mean old—he was forty-three. But he'd been in this trade for nearly twenty years, climbing from five-story buildings in his hometown county to the thirty-plus-story commercial complexes downtown. The rebar and concrete he'd lifted over the years could probably have built another small county.
His skin was burned dark red by the sun. His palms were wide, his knuckles thick, and a ring of rust-colored grime sat permanently under his fingernails—the mark of a man who'd spent years gripping joysticks and steel cable.
Everyone on the site respected him. Not just for his seniority, but because he said little, and every word he did say carried weight.
Take his morning ritual. Before he climbed to the cabin, he did three things, rain or shine. First, he walked a full circle around the crane's base, craning his neck to check the jib and the cable.
Then he pressed his palm against the cold steel of the tower and ran it up the length of it, touching every inch, like he was stroking a big iron horse's back.
Last, he pulled a faded red cloth strip out of his pocket—one he'd used for who knows how many years—and tied it around the cabin's door handle.
I asked him once what the strip was for. He was squatting under the crane eating his lunchbox meal at the time—potatoes braised with pork, the oil already congealed into a white layer.
He forked a potato into his mouth and chewed a long time before mumbling: "Keeps me safe."
"Does it work?"
He didn't look at me. He scraped the last grain of rice into his mouth, stood up, and brushed the dust off his pants: "Twenty years with it, and I've never had an accident."
I was young then, and I thought he was superstitious. But I didn't say it. On a construction site, when the old hands talk, it costs nothing to listen.
It was summer 2016. I'd been on this site for three months, working ground signal duty. Every day I stood under the crane with a walkie-talkie and directed Old Wei as he lifted materials up to the right floor.
The crane was fifty meters tall, with a fifty-five-meter jib. The cable ran down from the front of the jib, hook at the end. When a load went up, the cable drew taut and made a low hum, like something clearing its throat.
I was used to that sound. In the daytime, with the machinery roaring and the men shouting, you barely noticed it.
Only in the evenings after the workers had gone home, with the crane sitting idle and the cable swaying gently in the wind, would you catch the occasional faint squeak. Nothing special.
Until that Wednesday.
That afternoon was suffocatingly hot. The clouds hung low, like a wet rag clamped over the sky. Every breath was an effort.
The site was busy as usual. The concrete mixer churned. The rebar workers were binding floor slabs. Welding sparks rained down from the seventeenth floor like a swarm of burning fireflies.
Old Wei had spent the morning in the cabin. When he came down for lunch, his face didn't look right. He only picked at his food before setting it down.
"What's wrong, Master Wei?" I handed him a bottle of water.
He took it, unscrewed the cap, gulped twice, wiped his mouth: "Nothing. Didn't sleep well last night."
I looked at his eyes. A little bloodshot, but I didn't think much of it. Who on a construction site doesn't have insomnia now and then.
At two in the afternoon the break ended and the men drifted back to their posts. Old Wei climbed up to the cabin as usual. I checked in with him over the walkie-talkie: "Master Wei, the seventeenth floor needs a bundle of rebar, about two and a half tons. Can you lift it?"
The walkie-talkie crackled twice, and Old Wei's voice came back, lower than usual: "Hold on."
I waited about half a minute and heard the crane's motor hum overhead. The jib swung slowly around, lining up over the rebar storage area.
I raised the red-and-green flags, signaling the riggers on the ground to strap the bundle. Everything normal. The cable dropped from the front of the jib, the riggers clipped on all four attachment points, backed off to a safe distance, and I raised the green flag and said into the walkie-talkie: "Lift."
The winch began to turn. The cable pulled taut. The rebar bundle left the ground, swaying as it rose. I tilted my head back to watch. Sunlight leaked through a gap in the clouds, stinging my eyes. And in that moment, I heard something.
A whistle.
Soft and thin, like someone puckering their lips and blowing a tune. I didn't recognize the melody, but it sounded old—like something that had been popular back in the nineties.
The sound came from overhead. From the direction of the cable. Right along the path the rebar bundle was rising.
I instinctively looked up to find the source. There was no one on the crane's jib. Through the little window of the cabin I could only see Old Wei's profile, head down, watching the controls.
The cable was taut, motionless in the wind. But the whistle kept going, like someone was pressed against the cable blowing, drifting closer and farther, circling that blackened steel wire.
Then I heard a crackle in the walkie-talkie, and Old Wei's voice exploded out: "Stop! Stop! Cut it!"
The winch died. The rebar bundle hung in midair, swinging half a turn. I waved the red flag fast to clear the ground crew back and yelled up: "Master Wei, what's wrong?"
A few seconds of silence over the walkie-talkie, just heavy breathing. Then Old Wei said: "No more lifting today. Put the bundle down. Knock off."
"It's only two..."
"I said knock off!" His voice jumped, carrying a restlessness I'd never heard from him. "Set it down. Everyone, scatter!"
The men on the ground traded looks, but Old Wei's authority on the site was absolute. Nobody dared argue. The riggers unloaded the bundle, the jib swung slowly back to its starting position, and the winch reeled the hook up.
When Old Wei climbed down, his face was white as paper. He walked over to me, his lips moving like he wanted to say something, then swallowed it back. Finally he just patted my shoulder and said quietly: "Xiao Chen, we'll talk tomorrow."
I didn't sleep well that night. I tossed and turned in bed, the afternoon's whistle replaying in my head. In three months on this site, I'd never heard anything like it.
But there was no one up on that crane except Old Wei, and both his hands had been on the joysticks. He couldn't have blown it.
The next morning I got to the site and found Old Wei already there. He was squatting at the base of the crane, the faded red strip in his hand, tying it onto the door handle.
I walked over and called his name. He looked up, dark bags under his eyes. He obviously hadn't slept either.
"Xiao Chen," he said, standing up and brushing the dust off his hands. "Don't tell anyone about yesterday."
"What the hell happened?"
He glanced around. The workers hadn't arrived yet, and the site was empty. He pulled me into the shadow under the crane and lowered his voice: "You heard it too, didn't you? The whistle."
I nodded.
Old Wei licked his cracked lips, his eyes wandering: "I've been running cranes for twenty years. I've heard this sound five times.
"The first time was '03, a site in Hebei. I was twenty-seven. The old master who took me under his wing heard it, set the hook down on the spot, and didn't work the rest of the day.
"I didn't believe it. I asked him why. He said—the cable is blowing the whistle. If you hear it, you don't lift. Otherwise somebody dies."
"How did he know?"
"He said his master told him, and his master's master said the same." Old Wei paused. "That site had an accident the very next day.
"The crane next to ours snapped its cable. A three-ton precast slab fell from the thirtieth floor and crushed two men. That driver said the night before he hadn't heard any whistle."
A chill ran up my spine, but I held my ground: "Master Wei, isn't that just a coincidence? Accidents happen on sites all the time..."
Old Wei looked at me, and that look made me swallow the rest of my sentence.
He said: "You think it's coincidence? Then listen. The second time I heard it was '08, in Zhengzhou. I didn't stop that day, because the foreman was leaning on me hard. The schedule couldn't slip.
"That day, on the third bucket of concrete, the wire rope jumped the groove—slipped right out of the pulley. A full bucket swung through the air and skimmed past the heads of two workers.
"If I hadn't hit the emergency brake, those two would've lost their heads."
He rolled up his left sleeve. There was a scar on the inside of his forearm, running from wrist to elbow, lying there like an earthworm: "That's what the wire rope lashed me with when it jumped.
"After that, whenever I hear that sound, I stop. No matter who says otherwise."
I was quiet. I'd seen that scar before. Old Wei always wore long sleeves; he rarely showed it.
"But Master Wei," I couldn't help asking, "what the hell is that whistle? It can't really be..."
"I don't know." Old Wei cut me off. "All I know is this rule was paid for in lives. You remember it too. If you ever run a crane and you hear a whistle on the cable, no matter how urgent the job is, set it down and walk away."
He turned and walked off, leaving me standing under the crane. The wind was up that day, and the cable on the jib swayed gently, giving off a faint metallic rasp.
I cocked my ear and listened for a long time. Nothing but the wind and car horns from the road in the distance.
But from then on I picked up a habit. Whenever I passed a tower crane, I'd look up at the cable automatically, listening for any sound that shouldn't be there.
Life went on. The next few days were calm. Old Wei worked the crane as usual and never mentioned that day again. Sometimes I wanted to ask him what the whistle had sounded like exactly, but one look at his face and I kept my mouth shut.
On the fifth day, Foreman Li showed up.
Foreman Li had been sent down by the project department to push the schedule. Fortyish, gold-rimmed glasses, a light blue short-sleeved shirt that stuck out like a sore thumb on the dust-gray site.
The first thing he did was call all the crew leaders into the site shed for a meeting. The schedule was three days behind, the client was pushing hard, and from now on they had to work overtime to catch up.
After the meeting he went straight to Old Wei and offered him a cigarette: "Master Wei, I hear you knocked off early the other day?"
Old Wei tucked the cigarette behind his ear without lighting it: "Bad weather that day. Didn't want to risk it."
"The forecast said sunny." Foreman Li laughed and clapped his shoulder. "You're an old hand, plenty experienced. But sometimes you can be a little too careful.
"The truth is we can't afford any more delays. The rainy season's coming, and once it starts, nothing gets done. How about this—we work overtime the next few days, a couple extra hours each night, and make up the lost ground."
Old Wei was quiet for a moment, then said: "Visibility's bad at night. Height work is dangerous."
"The crane's got lights." Foreman Li's smile didn't change, but his tone had hardened. "Master Wei, I know you're thinking about safety. But safety's got to be efficient, right? If you're really worried, I'll have the safety officer keep an eye on everything."
Old Wei didn't say anything more. He nodded. That night, the site's floodlights came on, washing the whole place in a harsh white glare that made it look like daytime.
Old Wei's crane cast a long shadow in the light, the cable gleaming like a taut silver thread.
I was on ground signal duty. The first bucket of concrete went up without a problem. The second too. On the third, as the hook dropped down for the riggers to strap it, I heard a very faint hum from overhead, like someone had flicked a fingernail against the cable.
I looked up. The crane's jib was empty except for Old Wei's cabin. The cable hung still while the rigger looped the sling over the bucket.
Probably just the wind. I told myself.
The third bucket went up to the seventeenth floor without trouble. Fourth, fifth... until nine at night, everything was fine. The men were tired, moving slower, the floodlights pulling their shadows long and pale.
As the ninth bucket was being hooked up, I heard it again.
The whistle.
This time it was much clearer, and the tune was complete—an old song. It took me a long time afterward to place it: the intro to that ballad from the nineties, the one everyone had once heard a hundred times.
The whistle came from the cable, less than two meters above the hook, wavering like someone was crouched on the steel wire blowing it for fun.
The walkie-talkie almost fell out of my hand. I looked up. The cable was empty, just the night wind shivering the steel wire. The floodlight caught it, a cold sheen over the surface. Nothing there.
Old Wei's voice came over the walkie-talkie, hoarse, like he was grinding the words out through his teeth: "Xiao Chen... you hear it?"
I opened my mouth, but my throat was too dry to make a sound. I finally forced out one syllable: "...Yeah."
Five seconds of silence. Then Old Wei said: "Set that bucket down. We're done for today."
The riggers on the ground heard the exchange over the walkie-talkie and traded looks.
Foreman Li had appeared on the site at some point. He heard Old Wei, walked over, and snatched the walkie-talkie out of my hand: "Master Wei, it's just one more bucket and we're done. You're calling it quits now?"
"Foreman, we really can't work today." Old Wei's voice came through with a tremor in it. "Trust me on this."
"I trust you, but the client doesn't trust me." Foreman Li frowned. "It's one bucket. Half an hour. Finish this and everyone goes home. You don't want the boys coming back tomorrow for a single bucket, do you?"
Silence over the walkie-talkie.
Foreman Li urged him two more times, then sighed: "Tell you what. If you're that worried, I'll come up there with you. If anything feels wrong, we stop on the spot."
He started for the ladder. I grabbed his arm: "Foreman, don't go up there. Master Wei knows what he's talking about..."
"Knows what he's talking about?" Foreman Li shook me off, annoyed. "You people are all superstitious. What whistle? Cables don't whistle. It's the wind! Enough. I'm going up to have a look."
He climbed the ladder hand over foot, the hard hat too big for his head wobbling with every step. I stood at the bottom watching his silhouette rise, pass through the tower sections, and disappear at the platform below the cabin.
Foreman Li's voice came over the walkie-talkie, out of breath: "Master Wei, I'm here. Open up."
Then the sound of a metal door opening and closing.
I stood on the ground, head tilted back, the floodlight's glare making my eyes water. The crane's jib stretched silently into the night sky. The cable hung from its front end, the hook bearing that bucket of concrete about two meters off the ground, swaying gently.
And then I heard it.
Someone was whistling on the cable. Not one voice this time. Several—high and low, thick and thin, like a crowd sitting on the steel wire singing together.
The old ballad's melody came out torn and crooked, the off-key notes making my scalp crawl, but every phrase was perfectly clear.
Every hair on my body stood up. The walkie-talkie nearly slipped from my hand. I stared at the cable—nothing on it. The wind passed through, the wire swayed, and the concrete bucket on the hook rocked with it.
Then I saw the crane's jib begin to move.
No warning, no hum from the winch. That fifty-five-meter, ten-ton steel jib started turning on its own. Slowly, from facing the rebar storage, it swung—inch by inch—toward the site shed.
Old Wei and Foreman Li were both in the cabin. Foreman Li's panicked voice came over the walkie-talkie: "What's happening? Master Wei, you didn't touch the controls! Why is the jib turning by itself?"
Old Wei didn't answer. Just heavy breathing over the walkie-talkie.
The jib kept turning. The cable moved with it, the concrete bucket on the hook dragging a shallow furrow across the ground. The whistle grew louder, like a dozen people blowing at once, shrill and piercing, shredding the night wind.
"Master Wei! Master Wei, stop it!" Foreman Li's voice had gone tearful. "What the hell is going on?!"
"I can't stop it." Old Wei's voice had gone oddly calm, calm in a way that was terrifying. "The controls are dead. Every button's dead. Foreman, get down the ladder now. Go."
"What about you?"
"I'll be fine. Get down."
Metal clattered against the ladder as Foreman Li half-climbed, half-fell down the crane. I ran over and caught him. His legs were soft as noodles, his glasses knocked sideways, his shirt soaked through the back.
"Run... run..." He pointed at the crane, lips trembling. "Nobody up there... on the cable..."
Before he finished, I looked up.
The jib had turned until it hung directly over the site shed. The cable dropped from its end, the hook suspended in midair about ten meters up. The whistle stopped.
Dead silence.
Then the cable began to sway on its own, like someone was grabbing it and swinging on it like a swing. The steel wire swept out a wide arc, the hook carving a silver streak through the air—then snapped taut.
A sharp crack.
On the cable, about three meters above the hook, something had appeared. A red cloth strip—identical to the one Old Wei kept tied to the cabin door handle—wrapped around the steel wire, snapping in the night wind like it had come from nowhere.
Old Wei's voice came over the walkie-talkie, soft as a whisper to himself: "...Master? Is that you?"
No answer. The cable swayed twice, then stilled. The red strip lay against it, like a withered hand gripping the steel wire.
Then the jib slowly turned back to its starting position. The cabin light came on. Old Wei opened the door, looked down from the platform, and climbed down the ladder.
He walked up to me. His face was blank, but his hands were shaking. He fished a pack of cigarettes out of his pocket, lit one, and took a deep drag. The smoke scattered in the floodlight's white glare.
"The red strip," he said. "My master gave it to me.
"In '03, on that Hebei site, the accident the next day—it wasn't the crane that got him. It was his heart. He went to sleep that night and never woke up. I took this strip off his wrist myself."
Foreman Li sat collapsed on the ground, unable to get up for a long time. The other workers gathered at a distance, none daring to come closer.
That night, after work, Old Wei untied the red strip from the cable and retied it to the cabin door handle.
He said the rule would change from now on. When you hear the whistle, you don't just stop lifting—you tie the red strip onto the cable, wait for the whistle to stop, then take it back down. That's "giving it back."
From that night on, nobody on the site ever questioned Old Wei's rules again. Foreman Li gave him two days off and never mentioned overtime again.
I stayed on that site for another six months, until the project was done.
In that time, Old Wei heard the whistle twice more. Each time he set the work down, tied the red strip to the cable, waited about ten minutes, untied it, and went back to work. Calm. Nothing strange happened again.
On the day the project was completed, the men drank a lot. Old Wei had a few glasses too, his face flushed red. Emboldened by the alcohol, I asked him: "Master Wei, does that red strip really work?"
He looked at me and smiled: "Does it work? Well, that day—if it hadn't been tied on, when the hook came down, there were still two document staff working late in that shed."
A chill went through me. I remembered that when the jib had swung over the site shed, the lights in there had indeed been on.
"But..." Old Wei set down his glass, the smile fading, his voice dropping. "There's one thing I've never been able to figure out."
"What?"
"That day, in the cabin, I saw someone sitting on the cable.
"A man in a blue work uniform. The back of him looked familiar—but I couldn't place him. He turned his head, looked at me, smiled. Then he was gone."
He was silent for a long time. Finally he said: "Maybe it was my master. He came to check on me."
I didn't answer. The others at the table were still playing finger-guessing games, loud and rowdy. Outside the window, the city lights stretched into the distance, the newly finished building standing in the dark, its glass facade reflecting scattered lights.
Only I knew that when Old Wei climbed down from the crane that day, he'd said something quietly to me. He said that when the figure turned around, it had a red cloth strip in its mouth, and it blew him a whistle—the opening notes of that old ballad.
And Old Wei's master had only been fifty when he died, back in '03.
Today I've already moved through three construction sites and run cranes myself for over two years. Before every climb, besides the three steps Old Wei taught me, I do one more thing—I keep a red cloth strip in the cabin.
Not to keep me safe. So that if one day I hear someone whistling on the cable, I at least know what to "give back."
A new laborer on the site asked me what the red strip was for. I said it keeps me safe. He grinned and said, Boss, you're so superstitious.
I smiled too. Didn't explain.
Some things can't be explained, but a rule is a rule. And some rules really are paid for with lives.
Two days ago, as I climbed down from the crane at dusk, I heard a very faint whistle overhead. I stopped on the ladder and looked up.
The cable swayed in the wind, the setting sun staining the steel wire dark red. Nothing on it.
I stood on the ladder and hesitated for five seconds. Then I kept climbing down. I'd deal with it in the morning.
But tomorrow morning—do I tie the red strip onto the cable?
I haven't decided yet.
What do you think?