Aren't there two CX YVR-HKG flights (ex-YYZ and JFK) leaving within 40 minutes of each another around 3 AM daily? (Plus, I think, a turnaround that leaves at 3 PM or so?) Don't they both arrive around 10 PM? Not enough time?

What if you ticketed one of the legs as its AA codeshare? Kosher I think for the OWE.

If you have to spend an evening and morning in Vancouver, you can take comfort that it's the largest Sino-Scottish city in the world.