An hour will be tight, but it is doable. There can be lots of walking involved, maybe even a train.

If he is able to get his boarding pass in YVR for PR 307, proceed to the closest transfer security checkpoint after getting off the plane.

If he needs to get his connecting boarding pass, PR has a connections desk at Transfer Point E1.

Take a look at the PDF for more details: http://www.hongkongairport.com/leafl...nsit_guide.pdf