According to HKIA introductionleaf - How to become an Architect?, the flow chart indicates that MArch (HKU & CUHK) is the professional desgree, and BAAS (HKU), BSocialSc (Arch) (CUHK), BSc (Arch.Studies) (CityU) and BSc(Arch) & B(Arch) (Chu Hai) are thepre-professional degrees. Hope this answers your questions. Don't listen to any bullshit here. If you still have questions,you may directly contact Prof.Paul Chu, the Head of Arch. Dept.- Chu Hai, who is HKIA member and Registered Architect and is HKU graduate.