On April Fool’s Day, a group of male students secretly poured dishwashing liquid right in front of the classroom door.
Our form teacher was eight months pregnant at the time.
Her bump was so large that she had started moving through the classroom with careful little pauses, one hand grazing the nearest desk, as if every step had to be negotiated.

The boys knew that.
Everyone knew that.
That was why the sight of the washing-up liquid spreading across the tiles made my stomach turn cold.
It was not a harmless joke.
It was a trap.
I found out before she did.
I was carrying a thick stack of freshly printed revision documents when I pushed open the front classroom door, thinking only about getting them to the teacher’s desk before the lesson began.
My shoe touched the floor.
Then it shot forward.
There was no time to catch myself.
The stack flew out of my arms and my body crashed down hard, my tailbone striking the tile with a pain so sharp that the ceiling lights seemed to burst white above me.
For several seconds, I could not even breathe properly.
Then laughter came down on me.
It was not nervous laughter.
It was pleased.
Li Hang stood over me with Wang Hao and several other boys, their faces bright with the satisfaction of seeing something work.
“She actually fell,” one of them said, nearly choking on his own amusement.
Another boy kicked at the fallen papers and complained that I had ruined their timing.
They had not meant the trap for me.
They had meant it for Teacher Zhao.
I tried to push myself upright, but my palm slid across the floor and came away slick with lemon-scented soap.
The smell was cheap and sharp, the sort used in the washing-up bowl at home, except now it coated the classroom threshold where a heavily pregnant woman was expected to walk.
The revision papers were no longer clean.
They lay in the puddle, edges curling, ink blurring, the neat black print turning into wet shadows.
Wang Hao laughed and told me to get out of the way.
They still needed to spread more before the old witch arrived.
Old witch.
That was what they called her when she was not in the room.
Teacher Zhao was strict, painfully strict, and nobody pretended otherwise.
She could spot one wrong vocabulary word from the back of the room.
She could turn a dropped rank into a call home before the day was out.
She once threw my homework onto the floor because I had been slow handing out exercise books.
I had gone home that afternoon with my face burning and my throat tight, convinced she hated me.
But people are rarely only one thing.
When my stomach cramped so badly during a lesson that I went pale, she noticed before my desk mate did.
After class, a glass of warm water and a box of stomach tablets appeared on my desk without a speech, without praise, without making me feel poor or weak.
Last winter, when I came to school in a thin uniform while everyone else had proper coats, she said nothing in front of the class.
A few days later, the school helped me get a warm coat subsidy.
I knew who had arranged it.
She could be harsh.
She could also notice things other people walked past.
So when the boys laughed about making her fall, I felt something hotter than fear rise in me.
“She’s pregnant,” I said.
My voice shook, partly from pain and partly from disbelief.
“If she slips, something terrible could happen.”
The words did not land the way I hoped.
The class looked at me as if I had spoiled a performance.
Li Hang crouched in front of me and slapped my face, not hard enough to leave a bruise, but hard enough to make the room tilt with humiliation.
“No wonder you’re her loyal little hound,” he said.
That made the others laugh again.
Someone said Teacher Zhao deserved it for being strict.
Someone else said it was April Fool’s Day, as though those four words could turn cruelty into comedy.
I looked around the classroom.
Some pupils were grinning.
Some looked away.
A few had the decency to seem uncomfortable, but discomfort did not make them stand.
It only made the silence worse.
Wang Hao lost patience first.
He grabbed my arm and hauled me upwards with no care for the pain shooting through my back.
I told him not to touch me.
He cursed and pulled harder.
That was when Zhang Xiaoxiao rushed over.
She pushed his hand away and helped me upright, her own face pale with fear.
“He’s hurt,” she said.
Wang Hao shoved her shoulder and told her to mind her own business.
She stumbled but did not let go of me.
Together, we reached my desk, where I lowered myself into the chair with my whole body shaking.
Zhang Xiaoxiao bent close and whispered that I should leave it.
She said I could not fight them all.
She said the whole class hated Teacher Zhao, and if I stood up now, they would hate me even more.
She was probably right.
That was what frightened me most.
The boys went back to their work with the concentration of people preparing a celebration.
They poured more washing-up liquid near the threshold.
Then they used a mop to smear it thinly across the tile until it looked like an ordinary wet floor.
A dangerous thing is always worse when it looks normal.
Teacher Zhao had a routine.
She arrived two minutes early.
She entered through the front door.
She walked the front row first, checked whether the desks were tidy, then went to the lectern.
Every pupil in that room knew her route.
My hands turned cold.
There was a phone hidden at the bottom of my school bag.
Bringing one to school was forbidden.
Teacher Zhao was especially strict about it.
If she found out, she could call my parents, confiscate it, make me write a reflection, or worse.
At that moment, punishment felt very small compared with the sound I had made when I hit the floor.
I imagined that sound coming from her.
I imagined her hand flying to her bump.
I imagined the classroom laughter stopping too late.
My fingers closed around the phone.
The screen lit up under the desk, hidden behind the flap of my bag.
I typed quickly, my thumb slipping because there was still soap on my sleeve.
Do not come through the front door.
There is washing-up liquid on the floor.
I sent it.
Then I placed the phone back and sat there, barely breathing.
The corridor outside was noisy in the usual way, shoes squeaking, chairs scraping in nearby rooms, a distant teacher asking someone to stop running.
Inside our classroom, the boys waited.
Li Hang kept glancing at the door.
Wang Hao leaned back in his chair, smiling as if he were about to receive a prize.
The minute hand moved.
Then footsteps approached.
They were slow.
Careful.
Teacher Zhao’s steps.
The whole class tightened around the sound.
No one spoke.
The footsteps stopped just outside the front door.
My heart beat so loudly that I was sure the people beside me could hear it.
The handle did not turn.
One second passed.
Then another.
At the back of the classroom, the rear door opened.
Teacher Zhao stepped inside.
She was breathing slightly harder than usual, her lesson book tucked under one arm, her other hand resting against the curve of her stomach.
Her eyes moved over the room with that sharp, quiet attention everyone feared.
First, she saw the front threshold.
Then she saw the mop leaning badly against the wall.
Then she saw my stained uniform, my stiff posture, and the ruined revision sheets drying into warped shapes beside my desk.
The boys’ faces changed.
Nobody laughed.
Teacher Zhao did not shout.
That almost made it worse.
She walked carefully down the side aisle, avoiding the front entirely, and stopped beside my desk.
For one impossible moment, I thought she would ask about the phone.
Instead, she placed a packet of tissues near my hand.
“Go to the medical room after class,” she said.
Her voice was calm.
Too calm.
Then she turned towards the board and began the lesson as if nothing had happened.
I heard almost none of it.
All day, I waited for the punishment to come.
At break, I expected her to call me to the office.
At lunch, I expected a message to be sent to my parents.
When the final bell rang, I expected her to appear at the door and tell me to stay behind.
Nothing happened.
That should have relieved me.
It did not.
Because the next morning, my desk was different.
There was a stack of maths papers waiting for me.
Not one sheet.
A stack.
The maths teacher said Teacher Zhao had asked for me to complete them by Friday.
Then the English teacher added reading comprehension passages.
Physics came next.
Chemistry after that.
By the end of the week, my bag was so heavy that the strap dug into my shoulder.
Zhang Xiaoxiao looked at the papers and whispered that Teacher Zhao was punishing me after all.
I thought so too.
For months, the work kept coming.
Every subject teacher seemed to take turns placing extra papers on my desk.
Mock exams.
Correction sheets.
Vocabulary lists.
Problem sets.
Past papers.
Sometimes, when rain streaked the classroom windows and everyone else was packing up, I would still be copying corrections while my tea at home went cold in my imagination.
I was exhausted.
I complained under my breath.
I wondered whether saving Teacher Zhao from falling had somehow trapped me in a worse fate.
But slowly, something changed.
The questions that used to frighten me started looking familiar.
The exam layouts stopped feeling like enemies.
I began noticing patterns.
I stopped guessing.
Teacher Zhao never praised me loudly.
She never called me brave in front of the class.
She never mentioned the message.
Sometimes she only tapped the corner of a paper and said, “Again.”
Sometimes she left a tick beside a solution and nothing more.
Yet every week, the stacks became less like punishment and more like a road being laid in front of me, one heavy sheet at a time.
Li Hang and Wang Hao still joked at first.
They said I had become Teacher Zhao’s favourite prisoner.
They said I would drown in paper before graduation.
But as the months passed, they stopped laughing so loudly.
My rank rose.
Then it rose again.
By the final term, even the pupils who once looked away from the soapy doorway had started asking me how I solved certain questions.
Zhang Xiaoxiao said quietly that perhaps Teacher Zhao had not been punishing me.
I did not answer.
I was afraid to believe it.
On the day the entrance exam results came out, the classroom felt like a station platform before a delayed train, everyone pretending not to watch everyone else.
Phones were out now with permission.
Hands trembled over screens.
Some pupils shouted.
Some cried.
Some sat completely still.
I entered my details and stared at the result until the numbers stopped swimming.
Only one person in our graduating class had passed the entrance exam to Tsinghua University.
That person was me.
For a long time, I could not move.
The room around me faded into a low blur.
Then I looked towards Teacher Zhao.
She was standing near the lectern, no longer pregnant, holding a folder against her chest.
Her expression barely changed.
But her eyes did.
Just for one second, they softened.
It was not a speech.
It was not a dramatic apology.
It was only a look, but I understood it more clearly than anything she had ever said.
That April Fool’s Day had not disappeared.
She had known.
She had known about the phone, the warning, the fall, the boys, the risk, and the choice I made when everyone else stayed still.
She had not called my parents.
She had not exposed me.
She had given me papers instead.
A year of them.
A year of being ground down until I became sharper than I had ever been.
People say one moment can change your life.
I used to think that meant a grand moment, something clean and obvious, with everyone clapping at the end.
Mine smelled of cheap washing-up liquid and wet paper.
Mine began with laughter while I lay on a classroom floor.
Mine began when I broke a school rule to stop someone else from being hurt.
And it ended with a result nobody in that room had expected.
Except perhaps Teacher Zhao.