Just thought I'd bring this collection to everyone's attention in case you weren't aware of it. 1500+ colour shots (un-edited, so there are quite a few dupes or out of focus etc) taken by a prolific photographer visiting HK in 1972. Lots of interesting stuff there; I've no idea whether they could be linked/used/integrated here..
https://www.flickr.com/photos/dboo/albums is the overall collection
and specifically these two albums for Hong Kong: