Portrait of the typical teenager
AT 16, Ah Peng is a typical Form Four student. He is 1.7 metres tall and weighs 58 kilograms - but like a lot of his classmates, he wants to be heavier.
His 14-year-old sister is 1.58 metres and 46 kg - but she wants to be lighter.
Like a third of the boys in his class, Ah Peng spends his pocket money on visits to video games arcades.
He plays soccer once a week, pounds the basketball court once a month and considers himself fit.
Last night, he spent two hours watching TV. Along with a third of his classmates, he did no homework but read a book for a while.
His breakfast is white bread or toast, but at lunchtime he munches on fast food, sometimes burgers, and swills fizzy drinks.
He eats beef or pork every day and seafood about once a week. He likes fruit, which he eats daily, but rarely sits down to a salad. He has ice cream about once a week.
Ah Peng had his first cigarette when he was 10. Last week, he smoked 10 and had one beer.
Although he has experimented with cough mixture and marijuana, he is in the minority - 86 per cent of his classmates say they have never touched drugs.
Like three-quarters of his age group, he has never been to a disco and, like most of his mates, he has never had a girlfriend. He feels a little uneasy with girls.