John Holmes

Not sure about the last one, a corvid came to mind, but I agree that 3 is Bar-tailed Treecreeper.

As for 1 & 2; for the sake of your records you might note that  "Eurasian Treecreeper" C.familiaris has been split and "Hodgson's Treecreeper" C.hodgsoni (0844.3) is often reported from JZG in the annual China Bird Reports, rather than Eurasian.

How to tell the difference between familiaris and hodgsoni ?

Mmmmm.... too hard for me.