Thanks for all your kindness and suggestions.
I would like to go to Metropolitan museum, SF Asian art museum and Rubin museum as far as I know now. My interests are chinese art (especially on stone and jade carving ) and Tibetan or buddism art.
I also would like to visit some universities like University ofPennsylvania (if possible) where a famous chinese architect used to study and got inspired by the 4 stone horse reliefs from the Tang emperor's tomb in shannxi province.And I also like to see these horses.
finally I want to visit some second hand book store or market for interesing books or documents of or about china.

well these seem enough for an aged man.
Hope to meet you some day and it would be great experience.
THANKS again for all your informations and kind help.

R.M.