Not what it seems to be
A derivation of this image appeared as posters on the pavement-side wooden walls around the K2 construction site at Tsim Sha Tsui in 2018.
However, its not quite what it seems as the locomotive is post-war KCR steam locomotive No 23 and the on-lookers next to it are wearing early 20th century clothing, possibly they are part of the railway’s opening day crowds in 1910.
Graphic designers license instead of historic depiction.
No doubt this image will travel around the internet via Google as a genuine photograph.