@Victoria_v you bring up a good point! Food at the airport!
Paradise Inn is also a fairly good chain of chinese restaurants. Very authentic and good affordable price for everybody.
If at Terminal 2, i recommend Soup Restaurant https://goo.gl/maps/BAU6ShtpPAS2 (actually a chinese restaurant). Ginseng chicken very good.
If at Terminal 3, try Dian Xiao Er https://goo.gl/maps/88xBGypDLGP2 nice classic chinese ambience. Lovely herbal smoked duck. They have so many flavours and meal sets.
Terminal 3: https://goo.gl/maps/SjpbU76tj2E2 Curry Times - authentic local food, really like this place.
Terminal 1: alot of renovation recently so I’m not sure what’s still open, Crystal Jade would be good. https://goo.gl/maps/pjxVwonZpst
If you’re in chinatown: try Chinatown Complex second floor. https://goo.gl/maps/nJMHjiYzqVG2. There’s a little xiaolongbao stall that is really nice and cheap. https://goo.gl/maps/QwwNorbivXF2
As a local, I will tell you to skip the “food street” outside - it’s a bit too touristy. =) haha. The second floor hawkers really have much nicer stuff. Don’t worry it’s all safe to eat.