Food

any foods I must try

Only know about HK. Eat everything but especially:
wonton noodle soup - dads favourite
egg tarts
black truffle scrambled eggs capital cafe. I was like meh eggs, but pretty much hoovered it down without letting my parents have any.
suckling pig
roast duck or if you can get goose
pineapple bun - mums favourite
Dim sum everything! Tim ho wan is fine but I went when it was just their tiny shop they everywhere now and not as good.

Weird but cultural, you can try medicinal herbal teas and soups. They're in proper shops and its difficult to figure out what it is, but you can try and ask! For your health...cooling your hot air, etc.
Oh grass jelly.