In another book I am reading this passage is referenced in a book
called Against The Grain by Huysmans:

http://tinyurl.com/28odbuw

I looked at my lists of yellow teas and couldnt come up with anything
matching si-a-fayoun, mo-you-tann, khansky. I do have kekecha yellow
tea which might pair with khansky. BaiMuDan white tea might pair with
mo-you-tann. I cant think of anything with si-a-fayoun. I just
thought it interesting with such a early reference to yellow teas
perse. I have some see through bone china cups. I would have trouble
replacing them.

Jim