Curious filing from UA. I'll put this out there in the event someone smarter than me can figure things out.
SFO - HKG can be had in C as a P fare for ~ $800 (including the Polaris non-stop). It cannot be had on a one-way basis, only part of a round trip.
June 4
But I can't get the return to price similarly even though there's plenty of P fares available:
June 14:
A one-hop in via TPE in C (J/P) will price out at $2164 ($3K total RT)
Or, you could take the "Economy" option and do a hybrid C/Y routing for $2K. It's not expanded in picture below, but even if you pick the Economy option TPE - HKG segment is in J.