It's very standard:
1) Non-technical Interview with head of HR who is very good at extracting detail from logbooks.
2) If successful, then a final technical interview with head of HR, and two pilots (expect aerody, current aircraft, Airbus info, company info, & HKG related questions)
3) Sim session in either a 320 or 330 with all of the automatics disabled. It is raw data, no autopilot (hand flown) at a generic airfield. There will be some kind of engine related failure, just fly it safely and don't worry about the ECAM. If your scan rate is okay and you can fly an ILS you will be fine.
Hong Kong is very expensive so be ready for a small apartment.
Good luck