atfso,
I think if you are controlling in HK then you would be wise to join HKATCA and even if it's for one reason.If you stuff up,or something happens that management can start pointing a finger of blame,then you may have back-up and even access to legal advice.
If you search back to the Ben Macdhui crash in the UK,(probably in Military or ATC section)then GATCO helped the innocent military controller who was facing a court marshall.
PS the HK Association had some a few good p
ups as well.