FRIDAY NIGHT. For most, it is the end of another work day. But not for Jef Cheah, better known as DJ Teng Boon. His 'day' has just begun. And tonight, his first call of duty is at Liquid, a club located on Elgin Street in Central. 10.07 pm - The 31-year-old DJ finally shows up with his record case six hours after we were due to meet. Arranging to meet him in the afternoon is probably a terrible mistake. For him, those are the 'small hours'. He apparently woke up only two hours ago. Teng Boon keeps apologising for oversleeping and missing the appointment and explains that he worked until 7 am. 'If you are a full-time DJ, you have to be prepared to work very late at night as most of the clubs in Hong Kong are open quite late,' Teng Boon says. 'And you still have to wake up quite early. That means you don't have enough sleep.' His normal work day usually starts at 9 pm or 10 pm and does not end until 2 am to as 'late' as 5 am. But tonight, he has a really tight working schedule - he has to play at three different clubs until 9 am the following morning. He explains work on a weekday is usually harder because usually there will be several DJs playing in the club on the weekend. Teng Boon laments: 'Friday night is a nightmare! It kills me!' 1 am - After finishing his first gig at Liquid, the DJ of 10 years takes a 90-minute break. After that, he has a six-and-a-half-hour marathon ahead. 2.30 am - Teng Boon packs his record case and walks to his next port of call, Drop, which is just down the road. 'People think it's easy being a DJ, you just show up and play some music,' the Dutch Malaysian Chinese explains. 'For me, because I play at different venues, it's really difficult. I have to carry my records with me - they're very heavy - and every night I have to bring different sets of records.' Every night he spends two to three hours preparing for work at home, choosing the right discs to play. To keep himself abreast of the latest music trends, he has to visit record stores on his days off - Monday and Tuesday. On average, he buys 20 to 30 records per week. Buying records for a living? That has to be the coolest job in the entire universe? 'DJs are like addicts. We're addicted to records,' he says. 'When we listen to a record, we have to have it.' He has more than 3,000 records at home after almost 10 years of deejaying. Knowing how to use equipment such as the turntable is just a small part of his job. 'You should be a DJ if you're a music lover, have a strong passion for music and have discovered a particular kind of music that you like,' Teng Boon says. Although there are some DJ lessons available, most good DJs are self-taught. He says: 'I really think nobody should pay someone money to learn to be a DJ. That is really stupid. If you are really passionate about music and have a feeling for music, buy a turntable and learn on your own. You have to develop your own style. That's the best way.' Since there are more and more people in the deejaying business, Teng Boon thinks it is quite difficult to get into the field right now. He says: 'The only thing you can do, unless you know somebody [in the deejaying business], is to just try to give a demo [to the clubs' owners].' 6 am - On that note, he dashes out of Drop and rushes into Home on Hollywood Road at the break of dawn for his last gig of the 'night'. His parting words are: 'Don't be a DJ just to be cool or just to be a superstar - that's wrong. You have to be a music lover. If you don't know what kind of music you like, then don't be a DJ, let the real DJ do the work!'