Hong Kong Intl Airport Runways?

Hi i just wanted to know a bit on how to tell what runway you're on during takeoff and landing. (especially at hkia)

I know 07L is the same runway as 25R but opposite direction, same with 07R and 25L. but which way is which? and does it change for landing and takeoff?

and also, i know there are two directions for landing that will allow you to see the hk skyline. which are they? does takeoff from a certain runway give you this view as well?

please help,

thanks!