As usual, my Chinese is not good (shameful, yes I know), but those are district councillors?
Yes. They are chairman or deputy chairman of their district. The most notorious of the four is the bad bitch on the bottom right. Who represent a district in Hong Kong island itself. The guy in bottom right represent Yuen Long (The district a certain member keeps harping on about triads). The girl on the top represent shum shui po. A district I grew up in. The top right guy represent Saigon district.
Perhaps you should take up Chinese class. I know it's a difficult language to learn. But if you could learn it, you won't regret it.