The singer-actress plays Ling, a beer promotion girl at a local bar who works around the clock trying to cover the debt of her boyfriend (Chau Pak-ho) and who is persuaded into providing 'compensated dating', trading sex for cash with a stranger. How does someone with Kwong's strong moral sense handle such a role?

What do you think of your character in Seven 2 One?

Ling is a great girlfriend. She hopes her boyfriend, Pakho, will quit gambling, and although she fights with him a lot, she loves him dearly. But Pakho just keeps making empty promises and breaks her heart over and over.

You played a similar type of role in Herman Yau Lai-to's Rebellion, recently. How were you able to balance these two roles?

Playing characters with similar backgrounds helped me get into the roles more. They both dropped out of school and found jobs in rather shady businesses. Rebellion opened recently, but it wrapped 18 months before Seven 2 One was filmed, so it wasn't that difficult for me to separate myself from the plots. Although many people think both roles are similar, in Rebellion I was secretly admiring a guy and trying to protect him, while in Seven 2 One I was already in a relationship but struggling to live with my boyfriend's gambling addiction, so they are quite different. However, both characters are pretty, innocent girls willing to go far for love.

How far would you go for love?

My future boyfriend definitely cannot have a gambling problem. Gambling addiction to me is like a bomb: there is no telling when it will explode. How can you form a trusting relationship with someone who has such a habit?

Do you have any friends or family members who are avid gamblers?

Not professional gamblers, but I know people who will bet on absolutely anything, even ridiculous wagers on things like whether a stray dog or cat on the street is male or female. Small bets involving only a couple of dollars are no big deal, but getting obsessed can be dangerous. I have heard of people borrowing large sums to gamble, which I think is wrong. They use somebody else's money to make big bucks without having to work. They end up losing everything.

Your character Ling trades sex for money. What do you think of her behaviour?

I am totally against it. Girls need to learn how to protect themselves and their bodies. Ling should wake up and know where to draw the line when it comes to financing her boyfriend. To me, trading sex is even worse than stealing money or robbery. Even if you are doing it to help another person or a sick family member, if the person you are helping loves you, they won't appreciate it if they know where the money is coming from.

Why do you think girls on the internet are choosing to offer themselves for compensated dating services?

Money, it's as simple as that. They see money as more important than themselves. They may just want to buy an expensive designer handbag and offering their bodies seems to be a quick and easy way to get it. But, honestly, how could you compare the value of your body to a handbag? And once you do it, you'll be tempted to do it again, maybe for a newer, shinier designer bag. Once you've done it once you won't think as much about doing it a second time. There is no way back.

Have you ever been tempted?

Never. I have my principles and I know my values. I have to say, for the first two years after becoming a singer I was struggling to balance my income and my expenses. Once you have a bit of fame, you have to buy clothes for functions and it is not very convenient to take public transport, so you need to take taxis all the time and on top of that you need to take courses to learn new things. Luckily, my parents helped me a lot but I had no more than a two-digit figure in my bank account then. But I don't believe in a free lunch. I have learned so much in the past three years of my showbiz career. I have nothing to lose.

Which part of the film do you like the best?

The ending. We filmed all seven stories for this film separately, so we didn't know how they were linked, but when I saw the film at the Chungmuro International Film Festival in South Korea, I finally understood it as a whole and what the director is trying to say with this film: if you take a slightly different approach and be a bit nicer and more generous, it creates a ripple effect that could mean the difference between life and death for someone. For instance, if I had overslept and ignored my friend's call to accompany her to an audition at a film company when I was in Form Four, I wouldn't have been discovered and perhaps I would now be in Canada, studying to become a vet or something. I find this movie inspiring and I would definitely recommend it to people.

Seven 2 One opens now