Look at this photo! This is how boarding groups are done properly! Further on the left is first (not actually applicable for this flight) / OWE, then Business / OWS, Premium economy / OWR and last one on the right is Economy. Boarding passes checked for the first three prior to the start of boarding. And as you can see it, this is not HKG, CX's base of operation, but CEB, a "regional" airport in the Philippines.
