Some useful links for more information on Hong Kong :

View from Victoria Peak through the ages:
https://m.facebook.com/story.php?story_fbid=1005707143113679&id=493144224135272

Memories of Hong Kong from expatriates:
https://gwulo.com/

Hong Kong landmarks:
https://www.timeout.com/hong-kong/attractions/the-best-historic-landmarks-that-will-make-you-nostalgic-for-old-hong-kong

Aerial photographs of Hong Kong:
https://www.gettyimages.co.uk/photos/hong-kong-aerial-view

Drone photographs of Hong Kong:
https://droneandslr.com/drone-aerial-photography/hong-kong/