Well i think the minimal scene is well represented in beijing there are few labels here (forgot the names, but they used to organize some events, Yan etc...) but for others styles....i don't know
I know few people playing Psytrance around Beijing, but they re not necessary chinese...but maybe one or two chinese in that band ? The thing is they are more mixing than proprely creating music. Maybe you heard about it if you are working in the music field
Acupuncture records would be a good place to start. Elvis T is on there if I remember. Really great minimal. B6(?) is also from the Mainland and fantastic.
@Alex, you are merely a degenerate guy, would I suggest u to seek a second opinion? Thanks