When to go
Best time
Late afternoon, Sunset
All months of the year are suitable to drone over the Langham Place.
I recommend flying in the late-afternoon or sunset when the sun isn't too high above you. This allows for a more unique shot with greater light and shadows.
Field tips
Prepare your drone to fly the distance, battery charged.
For your composition, because of the density of buildings around Langham Place and its height, taking shots facing straight down make for some great angles.
Fly around the area! You're in a fantastic part of Hong Kong with lots great views.