I think they are not really banning itbut press "pause" till they have regulations for the cryptomarkes.
Why do I think so ? They want to regulate ICO´s, what sense would it have if ICO´s are regulated but there are no Exchnages
There's a chinese guy here that said, china government tends to "temporarily ban" things, which is why he is not worried about it.
China will realize their mistake once they come into terms with the fact that bitcoin is not going away, ever, no matter how much they ban it, and that if they don't embrace it, they will be lagging behind against the rest of the world.
This is more insider trading by Chinese government, do not dump your coins, just buy the dip.