Propaganda.
Just having an A320 endorsement does not automatically give you a job with Dragonair as many ex AN A320 drivers have found out (much to their distaste).
The interview process at Dragonair is extensive and as a plus for the final panel interview, if any of the interviewers have any doubts at all you dont get the job.
Having an Airbus endorsement will however make you marketable for Qatar Airways, Etihad, Emirates or many European operators.