As a Hong Kong resident, you are obliged to have (and carry, we guess) a Hong Kong ID. It must be applied for withing thirty days of activating the long term visa. So you go to the Immigration Tower and apply for your ID. A week or so later, the ID is ready to pick up.
The ID is pretty plain, just a picture, some basic information like name and birthday. But also a chip with some biometrics.
And the biometrics makes for a very nice feature: You use it instead of your passport when entering and leaving the country. Fully automated gates works in two stages: First reads you ID and, if accepted, opens the first set of doors. You enter, the doors close behind you. The second stage is a finger print scanner that match the finger print on the chip with what is scans. If OK, the second doors open and the immigration/emigration procedure is done. 20 seconds, tops!
I wish we had an ID like this in Sweden, too.
Did I say you get the ID for free?