off the top of my head
Chthonic - Tai Black Metal with use of an Er-hu (chinese violin)
and the band ThanatoSchizO has a wide variety of influences, but I believe on the song Patheon (as in Strip-Tease) on their album Schizo Level uses the Chinese zither (forget the actual name).
Thats all I can think up for now, I'll see if there's anything else I've forgotten.