There's meal service on the 2nd flight as well.

Re snacks on SFO-HKG, I have done ORD-HKG in Economy (once)...I hope never to have to do it again, but it was much nicer than AA ORD-DEL. The snacks are mostly packaged cookies and saltines and such. (There were a few apples and sandwiches but they went quickly; if you might want them, grab them early and save them.). There's also supposed to be noodles, but they are those dehydrated noodles packaged in plastic cups (primary ingredient MSG) into which hot water is poured. I saw no one eating them; I suspect that the FAs avoid doing the extra work. In order to save on snacks, CX may feed you a second time halfway through the flight; the rest of the flight there will be only those packaged snacks.