I generally don't fly YVR-HKG precisely because of this problem -- the ontime arrival performance is abysmal. It is worse in the winter (due to winds) so there is some prospect for improvement for your flight dates, but the SFO and LAX flights are consistently better. All of my flights YVR-HKG have been over an hour late (however I didn't have a tight connections). CX is superb at handling tight connections -- really amazing how good they are. I've made a 10 minute connection time (and they would have held the flight if it had taken longer). There are ample staff meeting the flight to escort connecting pax to their gates or to make reroute arrangements.