If only it were smaller AND lighter!
I was impressed too, but the technique (which is really an adaptation of John's approach) does depend on the patience of the bird!
Hong Kong: House Sparrow, Ultramarine Flycatcher, Rufous-faced Warbler (467)
Greater China: Franklin's Gull, Buff-breasted Sandpiper (961)
Lifer: Syrian Woodpecker, Middle Spotted Woodpecker