Since OP's itinerary is entirely on CX, this thread has been moved to the Cathay Pacific forum where it will be seen by those members who are most knowledgable on the subject.
Please note that the original thread title indicated that this was concerning a TRANSCON flight, and was changed after subsequent clarification. Also note that this thread originated at the flame-free Information Desk — please reply accordingly.
Thanks everyone.
~Moderator, Information Desk.