Evil Silken Credit Twins Humiliate the UPS Guy

I saw this billboard in Mongkok. I’ve seen this pair a few times on local TV - nearest I can figure is they’re vaguely mythical heroes who shill for a credit bureau, but of course the commercials are in Cantonese so who knows. I just found the image funny, though bizarre and vaguely disturbing as well. What exactly are they trying to portray here? And why are they humiliating a doughy UPS delivery guy by pinning him with candy-striped poles, to say nothing of forcing him to wear a paper sack over his head? What is he supposed to signify? Bad delivery services? And why are they striking martial arts poses while bedecked in matching silk suits, berets, and ties - do they have business suits under the kungfu suits? And do I really want to know?