On April Fool’s Day, a group of male students secretly poured dishwashing liquid right in front of the classroom door.
I found out because I was the first one to fall.
That morning had started with the ordinary sort of pressure that hangs over a graduating class.

The bell had not yet gone, but the corridor was already full of damp uniforms, hurried footsteps, and students pretending they were not terrified of the next mock paper.
I had been sent to collect a stack of newly printed revision sheets.
They were still warm from the machine when I carried them back, the corners pressed neatly against my chest.
Inside the classroom, there was too much laughter.
That should have warned me.
On a normal morning, everyone complained, copied homework, searched for pens, or tried to sleep for five more minutes with their heads on the desk.
That day, several boys were sitting too straight.
Li Hang was near the front.
Wang Hao had one elbow on the desk, his smile turned towards the door.
The moment I pushed it open and stepped inside, my shoe lost the floor.
My leg flew forward.
The papers went everywhere.
My body dropped hard, and the back of me struck the tiles with a sound that seemed to split the room.
For a second, I could not breathe.
My tailbone burned.
My eyes watered.
My hands slapped down to stop myself, but there was no grip at all, only something cold, slippery, and sticky between my fingers.
Then I smelt it.
Washing-up liquid.
Cheap, sharp, lemony washing-up liquid, spread thickly across the classroom entrance.
The laughter burst above me.
It was loud enough to make the desks feel closer.
“Look at that! He actually fell!” someone shouted.
“Idiot,” Li Hang said, clapping once as if the whole thing were a show. “That was for Zhao.”
Wang Hao bent forward, grinning so widely his face looked wrong.
“We were waiting for the King of Hell,” he said. “Who told her loyal guard dog to rush in first?”
The room laughed again.
I lay on the floor, half twisted, my uniform smeared with liquid, while the revision sheets soaked up blue streaks around me.
Those papers had been clean a moment earlier.
Now the ink was starting to blur.
Equations, vocabulary lists, sample questions, all sliding into one wet mess.
I tried to push myself up.
My palm slipped.
Pain ran from the base of my spine up through my back so quickly that I had to bite my tongue.
“Move,” one of the boys said, kicking a clump of ruined papers aside. “You’re in the way.”
“In the way of what?” I asked.
My own voice sounded thin.
Wang Hao pointed towards the corridor.
“We need to add more before she gets here.”
The words landed harder than the fall.
Miss Zhao was eight months pregnant.
Her belly was so large by then that she walked slowly, one hand always supporting it, the other sometimes resting on the wall when the corridor was crowded.
Every student in our class knew she came early.
Every student knew she used the front door.
She had done the same thing all year.
Two minutes before class, she would enter, look across the rows, check the blackboard, and then stand at the teacher’s desk as if nothing in the world could make her late.
If she stepped where I had stepped, she would fall.
If she fell the way I had fallen, it might not just be embarrassing.
It might be dangerous.
“What is wrong with you?” I said, pushing myself up onto one elbow. “She’s pregnant.”
Li Hang crouched near me.
He was still smiling.
“That strict old witch?” he said. “You feel sorry for her?”
“She could be hurt,” I said.
“Good,” someone muttered.
The word was quiet, but I heard it clearly.
A few students looked away then.
Not because they disagreed.
Because hearing it spoken plainly made the joke feel uglier.
But Li Hang did not look away.
He reached out and tapped my cheek, not hard enough to be called a proper slap, but hard enough to humiliate me.
“No wonder she likes you,” he said. “Even lying in her trap, you’re still wagging your tail.”
A few boys laughed again, more cautiously this time.
Wang Hao shook the plastic bottle in his hand.
There was still liquid inside.
The label was half peeled off, and the cap was sticky where he had been squeezing it.
“It’s April Fool’s Day,” he said. “Can’t you take a joke?”
April Fool’s Day.
They said it as if it were a permission slip.
As if cruelty became harmless when you gave it a date.
I looked round the room.
Some students were laughing.
Some were pretending to look inside their bags.
Some were staring at the door, waiting for the next part.
Nobody was standing up.
Nobody was telling them to stop.
That was the first thing that frightened me properly.
Not the fall.
Not the pain.
The silence of everyone who knew exactly what was about to happen.
Miss Zhao was not a gentle teacher.
I would never have called her that.
She could spot one wrong character in a line of homework from the back of the room.
She could turn a single mistake into fifty written corrections.
If your ranking dropped, she called your parents.
If you forgot a book, she made you stand.
If you were late handing in work, she did not accept excuses.
Once, I had been slow collecting exercise books.
She took my own homework, threw it onto the desk in front of everyone, and said that people who had no respect for time should not expect time to respect them.
I had wanted to disappear.
For three days afterwards, I could not meet her eyes.
So yes, I understood why people feared her.
I understood why they complained about her.
I had complained too.
But fear is not the same as hatred.
Annoyance is not the same as wanting someone to fall while carrying a child.
And strictness is not the same as cruelty.
I knew that because of the things she never announced.
One afternoon, my stomach hurt so badly during class that the words on the board started tilting.
I tried to hide it.
I did not want to be accused of making excuses.
Miss Zhao stopped mid-sentence.
She looked at me for no more than two seconds.
After class, a mug of warm water appeared on my desk, along with stomach medicine and a short note telling me not to take it on an empty stomach.
She never mentioned it.
She did not ask for thanks.
Last winter, when my uniform coat had become too thin for the cold, I kept my arms folded in class and hoped nobody noticed.
She noticed.
She said nothing in front of the others.
A week later, I was called to collect a warm coat arranged through the school.
No speech.
No public kindness.
Just a form, a folded receipt, and something warmer to wear.
That was Miss Zhao.
Sharp on the surface.
Quiet underneath.
And now those boys were spreading washing-up liquid where she always walked.
“Still lying there?” Wang Hao snapped.
He grabbed my arm and pulled.
The movement dragged pain through my back so fiercely that I gasped.
“Don’t touch me,” I said.
His face hardened.
“Don’t act brave. If you mess this up, I’ll make sure you regret it.”
Before I could answer, Zhang Xiaoxiao rushed from the third row.
She pushed his hand away.
“He’s hurt,” she said. “Are you blind?”
Wang Hao shoved her shoulder.
“Get lost. It’s none of your business.”
She stumbled, caught the edge of a desk, and still came back to help me.
Her hands were shaking as she pulled me towards my seat.
The ordinary things on my desk seemed strange then.
A pen without its cap.
A folded timetable.
A card for the next mock exam.
A bottle of water I had not opened.
Everything normal, while the floor by the door shone like a trap.
“Feng Hua,” Zhang Xiaoxiao whispered, “don’t stand up to them.”
“I have to stop it,” I said.
“You can’t.”
“She’ll fall.”
“I know.”
Her eyes flicked towards the front of the room, where Li Hang was pouring more liquid in a wide, careful line.
Then she lowered her voice further.
“But the whole class hates her. If you make them look bad, they’ll turn on you too.”
She was not being cruel.
She was frightened.
In a classroom, sometimes fear has its own rules.
People do not always choose what is right.
Sometimes they choose what will leave them alone.
Li Hang had picked up the mop.
He dragged it across the tiles with slow satisfaction, spreading the liquid until it looked less obvious.
From a distance, it could have been water.
A cleaner’s mistake.
A wet patch after someone came in from the rain.
He stepped back to admire it.
“Perfect,” he said.
Wang Hao laughed and put the bottle behind the bin.
“Two minutes,” someone warned.
The room shifted.
Bags were pushed under desks.
Chairs scraped.
Students sat up, trying to look innocent.
The sudden orderliness made my stomach turn.
They were not only willing to do it.
They were willing to perform innocence afterwards.
My pain had settled into a deep throb.
Every small movement made my back protest.
Still, I bent down towards my schoolbag.
Inside the side pocket was my phone.
Bringing it to school was forbidden.
Miss Zhao was especially strict about phones.
She said they made people lazy, careless, and dishonest.
She checked bags without warning.
Anyone caught could expect a call home and a pile of extra papers thick enough to ruin a week.
I had hidden mine because my parents sometimes worked late, and there were days when I needed to message them before getting the bus home.
I had never used it in class.
I had never dared.
Now my fingers found the edge of the case.
It felt too loud when I pulled it free.
The classroom clock clicked above the board.
Li Hang looked towards the corridor.
Wang Hao leaned back in his chair, one foot stretched into the aisle.
Zhang Xiaoxiao saw the phone and froze.
Her lips parted, but she did not speak.
Under the desk, I turned the screen towards my lap.
My thumb trembled over the keyboard.
I did not have time to explain.
I did not have time to think of a perfect sentence.
I typed the plainest warning I could.
Do not come through the front door. The floor is covered in washing-up liquid.
My thumb hovered above send.
For one second, I imagined Miss Zhao reading it and then looking straight at me later.
I imagined her saying my full name.
I imagined my parents being called.
I imagined punishment papers stacked on my desk until I could not see over them.
Then I imagined her stepping through the front door.
I pressed send.
The message disappeared.
My heart began beating so hard I could feel it in my throat.
I shoved the phone back into the side pocket of my bag and tried to zip it, but the fabric caught.
That tiny sound seemed louder than the whole class.
Li Hang turned his head.
“What are you doing?” he asked.
“Nothing,” I said.
My voice betrayed me.
He narrowed his eyes.
But before he could stand, footsteps came along the corridor.
The class changed at once.
Every face rearranged itself.
The boys who had laughed now looked down at books.
Wang Hao picked up a pen and pretended to write.
Li Hang’s smile thinned, but he kept watching the front door.
The footsteps slowed.
They stopped.
No one breathed properly.
The handle of the front door did not move.
A second passed.
Then another.
Somewhere outside, a teacher’s voice spoke, too low for us to hear.
Li Hang’s expression flickered.
Wang Hao sat forward.
The trap lay untouched.
Behind us, at the back door, there was a careful knock.
Not loud.
Not dramatic.
Just two measured taps.
The sound made the entire classroom go cold.
Zhang Xiaoxiao gripped the edge of my desk.
The back door opened.
Miss Zhao stepped in slowly.
One hand supported her belly.
The other held her phone.
She did not look angry at first.
That was worse.
Her face was calm, pale, and unreadable.
Behind her stood another teacher, silent, with a stack of papers under one arm.
The class had never been so quiet.
Nobody laughed.
Nobody moved.
Even Li Hang seemed to forget the expression he was supposed to wear.
Miss Zhao’s eyes travelled from the back row to the front.
They paused on me.
For the smallest moment, I thought she knew exactly what I had done.
Then she looked at the classroom entrance.
The washing-up liquid gleamed there under the strip light.
A blue smear crossed the threshold.
A ruined revision sheet was stuck to the floor near the leg of the first desk.
The mop leaned against the wall, still wet.
Miss Zhao walked no further.
She did not need to.
“What happened here?” she asked.
Her voice was not loud.
That made it harder to bear.
No one answered.
Li Hang looked at Wang Hao.
Wang Hao looked at the desk.
A room full of people who had been brave enough to harm a pregnant teacher suddenly could not manage one sentence.
Miss Zhao waited.
The silence stretched.
Then her gaze moved to the floor near my chair.
My uniform was still stained.
My hands still shone faintly where I had not managed to wipe all the liquid away.
The scattered papers told the rest.
“Feng Hua,” she said.
My stomach tightened.
“Yes, Miss Zhao.”
“Are you hurt?”
The question was so ordinary that it nearly undid me.
I wanted to say no.
That is what people say when everyone is watching.
I’m fine.
It’s nothing.
Sorry for causing trouble.
But I could still feel the fall in my bones.
“A bit,” I said.
Her jaw moved once.
The other teacher stepped forward, but Miss Zhao lifted one hand slightly and he stopped.
She looked at Li Hang.
“Who poured it?”
No answer.
She looked at Wang Hao.
“Who spread it with the mop?”
Still no answer.
Someone in the second row began tapping a pen against a notebook, then stopped immediately when Miss Zhao glanced that way.
I thought that would be the end of it for me.
I thought she would deal with the room, confiscate my phone later, and call my parents in the evening.
Instead, she asked the class to open their books.
Her lesson continued.
She taught as if the front door had not become a crime scene.
She explained each question carefully.
She corrected two students.
She wrote on the board.
Only once did her hand pause on the chalk tray.
Only once did she press her palm briefly under her belly and close her eyes.
No one dared laugh again.
That whole day, I waited.
At break, I expected her to call me into the office.
At lunch, I expected my name to be announced.
After school, I expected to see my parents standing by the gate, faces stiff with worry and embarrassment.
Nothing happened.
No public scolding.
No confiscated phone.
No call home.
The quiet felt almost worse than punishment.
For a week, I waited.
Still nothing.
Then the papers began.
Not punishment slips.
Exam papers.
Thick stacks of them.
Maths from one teacher.
Reading comprehension from another.
Vocabulary drills.
Mock tests.
Correction sheets.
Writing practice.
Every subject teacher seemed to have suddenly remembered my name.
At first, I thought it was a new form of revenge.
Miss Zhao had caught me with the phone after all, I thought, and this was her way of grinding me down.
When I finished one pile, another appeared.
When I made a careless mistake, she circled it in red and placed three similar questions underneath.
When my handwriting slipped, she made me rewrite the answer.
When I looked exhausted, she put a mug of warm water on the desk and said, “Drink first. Then continue.”
No praise.
No softness.
Just work.
Again and again and again.
There were days I hated those papers.
There were nights when the numbers swam in front of me and I wanted to tear the whole stack apart.
But each time I thought of giving up, I remembered the classroom floor.
I remembered how a room could laugh at danger when the danger was meant for someone else.
I remembered how Miss Zhao had come in through the back door, calm and careful, holding her phone.
I remembered that she had asked, before anything else, whether I was hurt.
A year can change the shape of a person without anyone noticing.
It happens through small, repeated things.
One more paper.
One more correction.
One more early morning.
One more evening when everyone else has gone and you are still sitting under a classroom light, holding a pen that has left a dent in your finger.
The boys who had laughed that day did not vanish.
They still muttered.
They still called me names when teachers were not listening.
But the sound mattered less as the months passed.
Their joke had lasted minutes.
The consequences lasted far longer.
By the time the entrance exam came, I was tired in a different way.
Not hollow.
Sharpened.
Every mock paper had left a mark.
Every red circle had become a warning I knew how to answer.
Every correction had built a small piece of confidence I did not know I had.
When the results came out, the classroom was crowded around the notice sheet.
People pushed, whispered, counted names, checked rankings, and pretended not to care.
I stood at the back at first.
I did not expect anything impossible.
I only wanted proof that the year had meant something.
Then Zhang Xiaoxiao turned round.
Her hand was over her mouth.
“Feng Hua,” she said.
The room went strange.
Not loud.
Strange.
As if everyone had taken in the same breath and forgotten to release it.
There was only one name in our graduating class marked beside the result everyone had whispered about for years.
Tsinghua University.
Mine.
For a long moment, I could not move.
The paper on the board looked unreal.
The name looked like someone else’s handwriting.
Behind me, someone muttered that it must be a mistake.
Someone else said nothing at all.
Li Hang was near the window.
Wang Hao stood behind him.
Neither of them laughed.
That was when Miss Zhao arrived.
She was no longer eight months pregnant.
She carried a folder against her side and looked thinner than before, but her eyes were the same: sharp enough to find any weakness in a line of work.
She stopped beside the notice sheet.
She looked at my name.
Then she looked at me.
For once, she did not correct my posture.
She did not tell me not to cry.
She did not remind me that pride makes people careless.
She only said, “You did not waste the papers.”
That was all.
From Miss Zhao, it was more than enough.
Later, when the classroom had emptied and the noise had moved down the corridor, I found a folded sheet tucked inside one of my old revision folders.
It was from that April Fool’s Day.
The paper had a faint blue stain across one corner.
Washing-up liquid, dried long ago.
On the top, in Miss Zhao’s handwriting, was a line I had never seen before.
A child who warns others in fear still knows how to choose.
Underneath it was the first extra paper she had ever given me.
Not punishment.
A beginning.