'CX has always bonded cadets'
Not true.
CX have tried to make the cadets think they are bonded, by getting them to sign an agreement of return of service. BUT, this contract is NOT valid as the cadet does not get access to legal advice and an employee can NOT be bonded under HKG Law.
With cadets leaving for better employers (any other airline) after they finish training, the company is trying to trap them with this mafia embrace. A good company would improve conditions to retain staff.