Magpie Robin eggs aren't plain blue like this - they usually have dark brownish spots on a pale blue background.
To me, these look more like the eggs of a starling or myna. Depending on the location, probably Crested Myna, but perhaps White-shouldered Starling if they breed nearby. Author: K_Chan Time: 23/04/2019 22:12
Thanks ajohn for your hint.
Just in a park in Kwun Tong. Maybe black collar starling, or crested myna that are usually seen there.
But just wonder the egg could be so coloured, hence my query.