Chimneys at the former Ap Lei Chau power station

In a comment to the Ap Lei Chau power station, David wrote: It looks as though we can follow the progress from 1 to 5 generating units by the number of chimneys in the photos.

​Yes, that's true:

Zero (1967):

Ap Lei Chau Power Station 1967 1, by Quality_Street

One (1968):

Hong Kong. Ap Lei Chau Power Station. 1968, by m.peaker

Two (1974):

Power Plant at Ap Lei Chau, by doug

Three (1976):

1976_Ap Lei Chau, by Quality_Street

Four (1977-1979):

missing as an image here, but see one on Flickr.

Five (1980):

View from the peak on Aberdeen and Lamma Island, by Klaus