gary

This bird was again seen in Tai Po Kau today, supposing the same bird.
For me, I go for Blue-throated Flycatcher, although it can not rule out Hainan Blue Flycatcher.
Observation on field give me an impression of slightly larger in size than Hainan Blue.
Comparing with photo on OBC, it appears the orange breast, as shown in this photo, is relatively well-defined than Hainan Blue.

Gary