Well my wife's sister provided my wife's dad a place to stay and food, and all my wife and I did was give him money. I wrongly assumed my wife's sister claimed her dad as he was her dependent and they lived together, but her income hasn't ever been high enough for the parent allowance to be useful to her.Original Post Deleted
Also my wife's mom only recently started ordinarily residing in HK, and to be honest talking about income and/or taxes hasn't been encouraged in my wife's family. They always talk about property and shopping, but not directly about how much money they make or their taxes (because most people don't pay any salaries tax), and my wife has let me do all our tax stuff for a while.
It's a eureka moment for me, and I somehow missed that plenty of locals have used this to save money on their HK taxes (if they actually owe anything), which most don't anyway especially if they have dependent children.
I'm only starting to get more comfortable with talking about money, taxes, investments, and such with others. Many people unfortunately think talking about these things is boring (taxes) and/or taboo (money). Also many people I regularly interact with don't seem to care about these things that much, which is why I'm on this forum to find like minded people with some similar interests.