Other than niltavas, a Brown bush warbler was there.
I am not so familiar with ID of bush warbler. But the calling, color, and no eye brow are all pointed to the Brown bush warbler.
I hope I ID it right and I wish someone could find it and take some photos for it.
It was at the position of female small niltava. But it was on the middle position of a tall tree.
Chun