This is pretty much the whole story right here...
" NIFA official Li Lihui told a technology conference in Shanghai on Friday that a goal of Chinas monetary regulation is to ensure that the source and destination of every piece of money can be tracked. "
Bitcoin is the mortal enemy of '
tracking'. Therefore China is going to continue to assault Bitcoin from every angle. You can be sure of that.
I think they are just protecting their economy and they don't want there money to get out to the market without knowing any transactions about it.