Anyway, before Ben came to my apartment, I thought I should warn him about the old cocks and hens. He could never understand why there were always so many old people sitting in the street doing nothing all day.

'When you come through the gate,' I said, 'don't look at anyone with a red armband, even if they stare at you. Don't say hello. Just pretend you're blind and deaf. You have to walk up to the 12th floor. You can't take the lift with me because the Old Hen Lift Operator collects information on every person in the building.'

Ben didn't get it, but then how could he? It's not like a young white American will ever know how to behave in a communal Chinese apartment building. I tried to explain. 'If they see you with me, they'll think I'm a prostitute. They think there are only two kinds of young women in China: good girls or prostitutes. So don't argue please, just walk upstairs.'

I got into the lift. The Old Hen Lift Operator smiled at me conspiratorially. I particularly hated her. She had this cunning way of trying to find out what time I'd come back the previous night. I never understood why the crummy lift needed a 24-hour operator, with three shifts of fat women to run it. Another highly skilled job with a certificate.

'Back early today?' The Old Hen slid a suspicious sideways glance at my plastic bag.

I couldn't bear to answer. I just wished the pathetic lift would move faster. She continued to stare at my short skirt and my two naked legs, as if a dragon lurked at my feet.

When I finally escaped, I waited for Ben at the top of the stairwell. He was out of breath and grumpy.

'Are you trying to give me a heart attack?'

I put a finger to my lips – I could sense the old ears and eyes surrounding us. Ben was probably wondering how come the brave Fenfang he knew had suddenly become so gutless.

I opened my apartment door and hustled my stupid foreigner inside. I felt safer once I'd got there. Humans need cages around their bodies – wombs, houses, coffins.

Ben surveyed my four walls. He caught sight of the pile of CDs, DVDs and video tapes on my dirty carpet and started looking through them excitedly. 'Jesus, I never knew you had such a major film collection! Let's stay here for the rest of the day. We can chill out. I can't believe it. Some of these haven't even been released in America yet. And this one – Betty Blue - one of my favourite movies. Hey, we have to watch that one first.'

I agreed. I hadn't seen Betty Blue.

'But… do you have a toilet?'

Ben looked around anxiously, as if he was in a tent in Mongolia.

I pointed to the bathroom door. He went in, leaving the door ajar behind him.

John Lennon was singing 'Lucy in the Sky with Diamonds' when there was the most amazing bang on the door. This wasn't a knock. More like someone trying to smash the door in. I stalled. I was conscious of Ben still in my bathroom, but the banging was fascist – a sound conveying force and authority – and I knew I would have to answer. I tried not to panic. Could it be the police? I hadn't done anything wrong. I was just listening to 'Lucy in the Sky with Diamonds'.

I was shaking when I opened: two square faces belonging to two police officers. They stepped in with their standard shoes below their standard uniforms. They did a 360-degree sweep of the apartment: my kitchen, my curtains, my Simmons bed with no one in it, my small balcony with a few dead plants. My bathroom door was still ajar, they didn't open it. I felt like I was about to have a stroke.

'Is this apartment yours?'

'Yes, I rent it.'

'And who permitted you to rent it?'

'Why?'

'This is a government-owned building. Don't you know it is illegal to rent it out?'

There was a pause. No, I didn't know that.

Then they went on, methodically.

'Do you live here by yourself?'

'Yes.'

'Really? Just you? Your neighbours seem to think differently.'

'Well, sometimes friends come to see me.'

'Friends, huh? What sort of friends?'

I didn't answer.

'You are not married. Therefore you should behave like an unmarried young woman. Your neighbours have very strong opinions about your behaviour.'

I kept quiet.

'What's your job? Where are your identification papers?'

'I'm an extra – in films.'

I glanced at my Mao drawer.

'In films, huh? Let's see your ID.'

I rushed towards Mao to find my ID card. John Lennon had moved on to 'Strawberry Fields Forever'. I hurried back to the policemen – I could not let them look in the bathroom.

The officer examined my ID closely. I'd never bought a fake certificate for anything, even though you could get them easily, sold by dodgy men under bridges and on street corners. You could buy yourself a Masters Degree from Oxford if you needed one, an MBA from Harvard, even a document to prove you were disabled. I'd never done it though, all my papers were real.

Then one of the policemen said, 'You're going to make a little trip with us.'

I felt like that stroke might actually happen now. But I pulled on my coat, slipped into my shoes and headed for the door, which I closed behind us with my heart beating. Ben was still in the bathroom. Maybe he'd caught a glimpse of their uniforms and square shoes, but he wouldn't know what the hell was going on. Poor foreigner.

They led me to a van, which I realised was a military jeep. In the back seat there was a terrified woman clutching a small curly-haired dog. She looked pretty harmless, and so did the dog. The jeep took off with its sirens blaring and lights flashing. Heavenly Bastard in the Sky, it was just like in the movies. I asked the woman with her dog why she was there.

'You wouldn't believe it if I tell you the whole story. Me and my husband don't have children so we raise a few dogs at home, but we only have a certificate for one dog. We couldn't afford it for the others. So now they want to take this one away. I said to them this dog is my life, and if you're going to take him, you'll have to take me too. So the officer said fine, then you come down to the station with us. You know, a citizen like me has never known where the police station is, let alone been to it. I can't believe this is happening. Can you?'

No, I couldn't. I felt very sorry for her.

We arrived at the police station. I kept thinking about Ben, wondering if he was still in my bathroom. I prayed that he was okay.

Then I was sitting in the police station waiting for someone to question me. I wasn't alone. The criminal pet owner was there, still holding her poor little curly dog. There was also a small skinny man with bleached hair. He was from Guangdong and hadn't been able to get a temporary resident's permit since he arrived in Beijing. His criminal name was Illegal Resident. There was also a fat, middle-aged woman with long, wild hair like a wolf. She wouldn't sit down and kept yelling the whole time. She claimed she was innocent, that she hadn't stolen anything. As far as we were concerned, the police thinking she was a criminal – it was her fault. She screamed so much we ended up hoping they would kill her immediately.

The policemen had separated us with rickety tables and chairs. There was nothing else in the room – no calendar, no evening newspapers, nothing to distract us from our fate. All we could see was the office across the hallway. A policeman sat facing in our direction and watching the news. We couldn't see the TV, we could only hear its vague, tinny sound. Another policeman went in to pour himself some tea. An hour passed. And another. If these guys were so powerful, why couldn't they just fucking get on with it?

It was ten o'clock at night and still no interrogation. So I started my own self-examination. But the crimes I remembered didn't seem that bad. There was that one time in a term exam at middle school when I'd used a crib sheet. There was that time at the cinema when I'd found a gold ring under a seat, which, I admit, I kept. I kept the English dictionary too, but didn't feel that really counted since I perpetrated this deed in order to reeducate myself. And then there was the mobile phone I'd found. I'd definitely handed that to the boss, I was sure. And yes, I had boyfriends, but it wasn't like I was breaking up marriages. So what other mistakes had I made, I wondered, what other sins had I committed? Heavenly Bastard in the Sky, how the fuck had I ended up in a police station?