Eddy temple
whilst understanding from the emphasis put in your repeated posts that you may be vulnerable yourself, for reasons various such as juniority within your company, regardless of the recent comms you have had with immigration, and your attempts to rally support, it is not as clear cut as you would like to think.
This issue, (within CX and not your airline) was looked at in depth some years ago around GFC time. Both sides, union and management investigated and were re-assured that for a variety of reasons, not least of which were the technical role, experience, balanced demographics, that there was no requirement to simply shed those who were not
PR or HK locals.
So keep banging on your drum all you want, just because you keep saying so, doesn't make it true, regardless of how much you think a low level immigration staffs viewpoint has been interpreted in your favour.
Good luck either way.