The first is a Japanese White-eye. I think the tail looks an unusual colour because of the angle of the light on this photograph, not because it was actually unusual.
I agree with Striated Yuhina, now officially named as Chestnut-collared Yuhina on the Hong Kong list.
I think the first warbler is Yellow-browed, although the angle is a bit difficult for me.
The second warbler has wing-bars, so can't be Dusky/Radde's. Based mostly on wing pattern, structure and leg colour I think it is a Two-barred Warbler.
