Most bbcs will know that cantopop, TV serials and movies are the staple of the Hong Kong entertainment industry. You might not be so aware of the small number of theatrical performers, though. This guy's name is Jim Chim Sui-man. I first discovered him the last time I was in Hong Kong when I noticed a crowd of people gathered round a plasma screen in a Mong Kok VCD shop. They were watching this performance:
I guess he does what stand-up comedians do the world over: Poke fun at the society around them and make us laugh. A lot of the Cantonese is above my head but I'm sure you'll get the gist of it.
Jim Chin Sui-man on Wikipedia.