I think it could be a Brown-chested Jungle Flycatcher, though others on here are probably better placed to confirm it's id.
The large eye, with whitish eyering, the heavy bill and the reddish tail are the features I'm going on here. Can't really see the lowerparts very well but the appear to be much lighter than the uppers.
I'm not sure, but I think there was one at Mai Po at a similar sort of time last year.
I'd be interested to see what others say though.