Dining options should you happen to be in HKIA late at night or in the wee hours of the morning:
1. There is a 7-11 but they are only up to 2am so better buy in advance.
2. Hung Fook Tung which is sort of a dimsum type.
3. McDonalds for the win and thank God they are open all night long. Beware! They don't serve rice. They have meals but they serve it with fried. The good part is that their tables have USB ports but USB-A. No USB-C.