@ Wilmot
one outsider got what I meant - e.g. that given short delivery window, these would be aircraft which are already on order (Guggenheim who have 5 777F frames on order were already mentioned)
the other question would be what will be served with these three 777's and with the additional 744's - understanding that PVG is due to increase from 5 to 6 per week and HKG from 4 to 5, that still leaves quite some room for additional frequency or new routes