Career Advice Career Doctor

What's the etiquette for photos in CVs?

 

I would like to know whether I should include my photo on my CV. I am a female university student in my final year of university in Hong Kong and am applying for graduate positions. Some of my friends include their photos on their CVs, but I've also read that it is unprofessional. Is there a general rule or does it depend on the job you're applying for? Please help.