To get this started, a few (by no means comprehensive) historical threads can be found below. But feel free to post questions. Hopefully this thread will, over time, build up to be a useful place for reliable information about HKG transits on CX and UO.

Transit at HKG, Visit The Pier First Class Lounge
Minimum Connection Time - Hong Kong
https://www.flyertalk.com/forum/36462142-post510.html