I can't speak for Dragonair but you would be looking at 15 years plus to command in CX due to over a thousand pilots ahead of you and other factors. Thousands ahead of you if they offer any new crew base slots (which they haven't for a long time).
Just do your due diligence on cost of living and quality of life in HKG on the package you would be offered. Your 737 may not be a shiny widebody but where you are may not be that bad after all.
Last edited by Captain Dart; 9th Oct 2016 at 08:30.