It looks like lots of days from 3SEP to 21SEP, most subclasses (L below) are already closed, which could, of course, later open up, on HKGYVR.

Both HKGSFO and HKGLAX seem to be wide open throughout all the classes, except for a few days in the same period.

Perhaps a heavier load as one of the HKGYVR services goes to JFK?