China does not want to ban btc.
Notice there are lots of China banning btc news coming out but people in China are still using it.
If China is seriously banning btc, they would ban people from buying btc in China.
You cant do that. In any case banning is a double edged sword, it will make for people to grow a fascination with Bitcoin, just how people is fascinated with weed. I reckon if it was legal, it wouldn't be seen as cool and interest would actually decline. Banners can't win.