ajohn

Definitely a Blue Rock Thrush. They can be seen occasionally at some locations in Kam Tin, where man-made structures (buildings or the railway viaduct) take the place of natural cliffs.

ajohn

Yes, that is also a Blue Rock Thrush.
It seems to have no red below and fairly bright blue colour, which suggests it may be a male pandoo, the less common subspecies in Hong Kong (most are philippensis). Congratulations