My brother's family lives Hong Kong, and my niece is wearing graduation cap second from left. She graduated from Hong Kong University. Therefore I think this picture was taken in H.K.
But this doesn't look like H.K.U. and noone remembers where!
It is HKU, the two towers in the background are Kingfield Towers A & B. They're on Bonham Road.
This is actually right in HKU, the main building’s tower is easily recognisable.
This would be nearly exactly here: https://goo.gl/maps/4ibfStg4nfUu1TCfA