Cathay on three man ops has a CA, Relief Qualified FO, and a third FO or SO.
A relief qualified FO is basically the cruise CA.
On current four man ops it is CA, RQ FO, FO, SO.
It may be changing according to rumors to CA, RQ FO, SO, SO, but that would result in one of the pilots in the seat for landing being completely exhausted and fatigued especially at the end of an ULH since SO's are not in the seat for TO or LDG.