I can't understand what's the problem? Even if China banned the exchange of bitcoin into yuan it will not change anything. Exchanges outside of China will exchange crypto currencies for the dollar and the Chinese will get on their Bank account transfers in dollars. It seems to me that such news will not affect the attitude of Chinese people to cryptocurrency. There are issues much more important.
China is a capital control country you know? if you can't trade for CNY, then it has nothing to do with China anymore.
NO USD/EUR/CAD/GBP/JPY/etc goes in nor comes out from China. Chinese used to buy Bitcoin in China and dump aboard to bypass the control, this is one of the many reasons of the ban.
So the interesting question is : how do the Chinese evade the ban? By smugling gold to Japan and Korea ? And convert it there into USD and BTC ?