Have you ever been woken in the middle of the night by the sound of someone knocking on a watermelon? *Thump. Thump. Thump.* Like knuckles rapping on a ripe one.
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I'm a copywriter at an ad agency, and my sleep schedule is as mangled as a crushed cigarette pack. Bed at two in the morning is a normal night. Nine a.m., the alarm stabs me awake. I run out the door with a slice of bread in my mouth, tying my shoes in the elevator. By the time I reach my desk, the coffee's already half cold.
There's a fruit stall at the mouth of the alley between our office building and the residential blocks. The owner's in his fifties and always wears a faded blue apron. The stall isn't much—a three-wheeled cart with the bed propped up, stacked with whatever's in season.
Late spring into early summer, watermelons were the main stock. Boss Liu's watermelons were different from anywhere else. Other vendors sold by weight. He sold by the piece, never cut one open to prove it. He had one rule.
"You have to knock before you pick," he told every new customer, every time. "Bend your index finger and knock with the knuckle. If the first tap is a dull sound, take it. If the first tap rings sharp, put it back."
The first time I heard that, it struck me as funny. Everybody knows you knock a watermelon to test if it's ripe—market grandmas have been doing it forever. Since when was that worth stating as a rule? But I'd come to see he was dead serious.
Once, a young girl in glasses knocked one at random. It gave a sharp ring. Boss Liu's face changed on the spot. He clapped a hand on that melon: "This one's not for sale." Startled, the girl muttered "fine, don't sell it then" and left. Boss Liu set the melon aside by itself, covered it with a black plastic bag, and shoved it to the very back of the cart.
I was standing nearby waiting for change and saw the whole thing. That night I worked until eleven and passed the alley on my way home. The stall was packed up. Under the streetlight, nothing but a scatter of crushed rind. But I couldn't shake the feeling that the air carried a sweet, rank smell—like a watermelon cut open and left too long, the flesh starting to rot.
The next morning Boss Liu's stall was up as usual. As I passed, he was picking a melon for a middle-aged man. The man knocked three. All sharp. Boss Liu shook his head at every one. The man lost his temper: "You've got a whole cart of melons here—every single one rings sharp?"
"This batch isn't any good today," Boss Liu said, wiping his hands. "Come back tomorrow."
The man stormed off cursing. I drifted over and, without meaning to, asked: "Uncle Liu, what's actually wrong with the sharp ones?"
He looked up at me. The look in his eyes was the look you give someone standing at the edge of a minefield. He glanced around, then lowered his voice: "A sharp melon—the flesh inside it is alive."
"Alive?" I thought he was joking. "How can watermelon flesh be alive?"
He didn't answer. He pulled a little melon out of the cart—fist-sized, lopsided, clearly a deformed reject. He handed it to me: "On the house. Don't knock it when you get home. Just cut it open."
I carried the little melon back to the office. At lunch I sliced it open with a fruit knife. The flesh was pale pink, the seeds not yet gone dark. It tasted raw and green, just about edible.
But cutting near the stem, the blade struck something hard. I assumed it was an underdeveloped seed. I picked it out and looked. It was a bit of fingernail. A human fingernail. Pink, with the white moon at the base, the cut edge clean, like it had been sliced off with something sharp.
My stomach lurched. I nearly threw up everything I'd eaten. But thinking it over—the nail could've been from a melon farmer who'd nicked himself working. People pass through fields all the time.
I wrapped the nail in a tissue and threw it away, didn't give it another thought. That night I worked past one in the morning and passed the alley again on the way home. Nobody under the streetlight. The fruit stall packed up spotless. But as I walked past the mouth of the alley, I heard it clearly—
*Thump.*
Like knuckles rapping on watermelon rind.
I stopped. No one around. The sound came again. *Thump.* From deep in the alley, out of the dark. I gripped my briefcase and hurried past. Inside my building, riding the elevator up, I caught my reflection in the doors—pale, purple shadows under my eyes, mouth turned down. I wiped a hand across my face and told myself: sleep deprivation. You're hearing things.
For the next three days I took the long way around, avoiding that alley mouth. It cost me an extra ten-plus minutes. On the fourth day I couldn't be bothered anymore. A fruit seller, what could possibly be uncanny about that? When I reached the alley mouth, someone was crouched by Boss Liu's stall.
A young woman in a plaid shirt and jeans, hair in a ponytail. She was rapping her knuckle against a big melon. *Thump.* A sharp ring. She was about to knock a second time when Boss Liu grabbed her wrist: "Sharp one. Pick another."
She shook his hand off: "What's wrong with you? What's wrong with sharp? I'll buy whichever one I want."
"Sharp ones aren't for sale." Boss Liu planted himself in front of the melon.
Her face went red with anger. She stood and left. Two steps on, she turned back and snapped a photo of the stall with her phone: "I'll put this online and let everyone judge. Buying a melon and getting treated like this."
Boss Liu didn't stop her. He just stood there watching her walk away. In the sunlight, his blue apron had a patch of darker stain. It looked like sweat. But it sat around his belly, and sweat doesn't soak just one patch there.
That night I couldn't sleep. I lay in bed tossing, that fingernail stuck in my head. Past two in the morning, just as I was drifting off, a sound came through the window—
*Thump.*
I shot upright. The curtain wasn't drawn all the way—a gap showed. I crept over and looked out. The alley mouth below, under the dim streetlight. The fruit stall packed up. Empty. But the sound came again. *Thump. Thump. Thump.* Like someone knocking on a melon. A slow rhythm, one knock at a time. I crouched at the windowsill watching for a full five minutes. No one.
The next morning I went to work with two black circles under my eyes. Boss Liu was stacking fresh melons on the cart as I passed. I walked over. He looked up and smiled at me: "Young man, you don't look well."
"Uncle Liu," I hesitated, "after you close up at night... do you stay in the alley?"
His hand paused mid-stack. "No," he said. "I close at nine."
"Then last night I heard—"
"Heard what?" He stared at me.
"The sound of a melon being knocked."
Boss Liu was silent a moment. He set down the melon in his hand, wiped his hands, and dug a scrap of paper from under the cart. He handed it to me. On it was an address, in the old part of town west of here.
"If you hear it again tonight," he said, "don't look down. Go to this place in the daytime and find an old woman surnamed Meng. Tell her Old Liu who sells melons sent you."
I took the paper. The writing was crooked, but the address was clear: Wutong Lane, No. 17, second floor.
I couldn't concentrate at work that day. I made mistakes in several characters of the copy and caught a scolding from my team lead. After work I didn't go home. I took a cab west.
Wutong Lane was an old street lined with those eighties-style apartment blocks, walls peeling, stairwells stacked with honeycomb briquettes. No. 17 sat at the far end. The iron gate was ajar. I pushed through. At the bottom of the stairs sat an old woman, fanning herself with a palm-leaf fan.
"Who are you looking for?" She squinted at me.
"Grandma Meng? Old Liu the melon seller sent me."
The fan stopped. She looked me up and down, then stood: "Talk upstairs."
The second floor had a single room, door open. Inside, a table and two chairs. In the corner stood a shrine figure—I couldn't tell which deity it was supposed to be. Pitch black, with only a pair of eyes painted red. Grandma Meng told me to sit and poured me a glass of plain water.
"Old Liu sent you," she said. "What have you run into?"
I told her the whole thing—the melon I'd bought, the knocking, the sounds at night. When I got to the fingernail, her face changed. She stood, walked to the shrine, lit three sticks of incense, bowed, and came back to sit.
"The first melon you knocked—sharp or dull?"
"Dull," I said. "I bought it."
"Then you didn't lose out. A sharp melon—" she lowered her voice, "—the flesh inside it is alive."
Boss Liu had said the same thing. I asked her what "alive" meant.
The old woman pointed at the corner with her fan: "You see that figure? That's the Melon God. Back in the old days, during the famine years, some people were so starved they ate a kind of wild melon as food. That melon grew on the paupers' burial mounds, its roots sunk into dead men's bones.
"Eat it and you wouldn't die. But vines would grow in your belly, creep up out of your throat, and the person would become the melon's shell. Later someone managed to cultivate that melon. Outside it looks like an ordinary watermelon. But knock on it and it rings sharp. Cut it open, and the flesh moves."
A chill went down my back. "Then the dull one I bought—"
"A dull one is a good melon. Those living melons—if the first knock rings sharp, it means something inside heard you and answered. If you bought it, took it home, and cut it open—" She didn't finish. Her eyes said the rest.
"And the sounds at night—"
"When a living melon ripens, it splits open on its own," Grandma Meng said. "The thing inside crawls out. They like to mimic the sound of someone knocking on a melon, to lure people downstairs."
I shuddered. "Have people been lured down?"
The old woman didn't answer. She stood and pulled an old photograph from a drawer, handing it to me. It showed a row of people in old-fashioned clothes, standing before a melon field. In the center, one man held a watermelon aloft, beaming. But looking closely, at the stem of that melon, I could just make out a crack—like something inside was pushing its way out.
"This is the last photo of our village, taken before Liberation," the old woman said. "The day after this was taken, all those people were gone. The field had a few dozen new melons in it. Knock on any of them—all sharp."
She put the photo away and pulled a red cloth bundle from her pocket, pressing it into my hand: "Put this under your pillow when you get home. If you hear the sound again tonight, don't be afraid. Don't look down. Tomorrow, go to Old Liu. Have him pick you a dull melon. Take it home, cut it open, and eat the flesh clean, seeds and all. Not one bite left."
I left Wutong Lane gripping the red bundle. Inside it was something hard, like a stone, or a bone. That night I slipped it under my pillow. As I lay down I could still hear the wind rustling the leaves outside. But strangely, that night there was no knocking at all. I slept the soundest sleep I'd had in a long time.
The next day I went to see Boss Liu. He smiled when he saw me. "Went?"
"Went. Grandma Meng said to have you pick me a melon."
Boss Liu nodded, searched the cart for a moment, and picked out a medium melon—deep green rind, clear stripes. He knocked it once. *Thump!* A dull sound.
"Take this one home," he said. "When you cut it, don't use a metal knife. Use a bamboo one. After you cut it, clean out the flesh completely, and throw the rind far away. Don't put it in your own trash can."
I paid, carried the melon home. The sun was blazing white on the way. The melon was cool in my arms, an ordinary summer watermelon. But I couldn't shake the feeling that something was moving under the rind—behind the hard shell, like a heartbeat.
At home I dug out a bamboo fruit knife. As I cut into the rind, the blade felt wrong. A dull melon should have crisp flesh. This one's flesh was soft; the knife met resistance. I pried hard, and the melon split in two.
The flesh was bright red, like any normal watermelon. But near the stem, something was curled up. I poked at it with the bamboo knife. It unclenched. It was a hand. A baby's hand. Five fingers curled, nails pink. The cut at the wrist was clean, like it had been sliced off someone's arm.
My stomach seized. The bamboo knife clattered to the floor. But the next second, the hand moved. Five fingers slowly spread, then slowly clenched, like someone just waking up stretching.
"Shit—" I stepped back, hitting the kitchen door.
The hand's fingers began scraping at the flesh, peeling off small chunks and gathering them into its own palm. It was eating. It squeezed the red flesh into a ball, and then a slit opened in the middle of the palm—a mouth. No lips. No teeth. Just a vertical gash, sucking the flesh in.
Grandma Meng's words slammed back into me: clean out the flesh completely. Not one bite left.
I grabbed the bamboo knife and, eyes shut, stabbed down at the hand. As the blade went in, I heard an extremely faint shriek—like nails on a chalkboard. Then the hand slowly relaxed, five fingers flattening out. Still.
The flesh drained from bright red to gray-white, like bleached old cloth. I stood frozen for a long moment before bagging the whole melon, hand and all, in a trash bag and running downstairs to dump it in the big bin.
That night I didn't dare turn off the light. I sat on the bed scrolling my phone until past midnight, when my eyelids were too heavy to hold, and only then lay down. The red bundle under my pillow dug into my head. I turned over. Just as I was about to fall asleep, a sound came through the window. *Thump.*
My whole body went rigid. The sound came again. *Thump. Thump. Thump.* One knock after another, clearer than any before. I didn't dare look out the window. But the sound was getting closer—it wasn't coming from the alley mouth.
It was at the foot of my building. I heard the *creak* of the iron entrance door being pushed open. Then footsteps—very light, like something dragging itself across the ground. The footsteps climbed the stairs. One step. Two. Three. They stopped outside my door.
*Thump.*
That one struck my door. A muffled sound. Like knuckles on wood. Or like—knuckles on watermelon rind.
I got out of bed and walked to the door barefoot. The peephole was dark. I pressed my eye to it. The motion-activated light in the hallway was on, casting dim yellow light over the floor at my door. There was a puddle of water. Dark red, seeping slowly under the door crack.
The puddle spread toward my bare feet. I looked down. The liquid was deep-colored, like overripe watermelon juice. Floating in it was a small pink bit of fingernail.
I backed up two steps, spine against the wall. The sound outside stopped. Then I heard a voice—extremely soft, spoken right against the door panel. It was mimicking a human tone, but every word was drawn out long, like flesh squeezing its way outward.
"You... knocked... on... me..."
The motion light went out. Outside the door, silence for a moment. Then I heard the footsteps going back down. One step. Two. Three. Out the entrance door. The sweet, rank smell slowly faded.
I leaned against the wall gasping for a long time, my legs weak as noodles. I didn't dare open the door until the sky was starting to lighten. The floor at my door was clean. No water. No fingernail. But there was a round mark on the door panel, the size of a fist—like something had pressed hard against it from the outside.
I packed a few clothes and moved into a friend's place that same day. Later I changed jobs and moved to the other end of the city. I never passed that alley again. I never bought another watermelon.
But sometimes when I wake in the middle of the night, I still glance out the window out of habit. Only when I'm sure there's no figure under the streetlight can I fall back asleep.
Two months later, on a summer night, I came back from a business trip and took a cab through the old district. As we passed Wutong Lane, I looked out the window. Building No. 17 was still there. The second-floor window was lit. But the person sitting behind it wasn't Grandma Meng. It was a young woman.
She was bent over, a watermelon in front of her. She crooked her finger, ready to knock. The cab drove past. I didn't see whether her knock came out dull or sharp.
That night I lay awake in the hotel bed again. At three in the morning I picked up my phone and searched the words "watermelon stall rule." Very few results. Mostly urban legends cooked up by joke accounts.
But there was one post from three years earlier. The poster asked: "Does anyone know that old woman who sold melons on Wutong Lane, west side? Her rule was: knock once—dull means buy, sharp means no sale. I bought a sharp one from her. When I got home and cut it open..."
The post was never finished. Its last line was only three words—
"It's alive."