China is not out permanently, they're just out for now... as this technology sees wider spread adoption (i.e. Overstock.com now accepting, Virgin Galactic accepting - imho, field trial for the rest of the Virgin group companies, etc.) with larger and more entities, they'll want to be back in and don't be surprised that suddenly a wave of bitcoin millionaires show up in China on that day including government officials.

Their motive is currency protection which they can't easily see as manageable in the Bitcoin ecosystem but if they fall out of favor because they are not on the bandwagon then the corrective action is jump on.  Fiat currencies won't be dieing out anytime soon but cryptocurrency is poised to be the global mediator of currencies and as that becomes apparent currencies which do not allow easy ways in and out of it will have their growth hampered (IMHO)