Sorry, I just went to ask my Chinese friend.
The news I got was that China did not ban bitcoin transactions.
It's just tougher regulation.
I also don't see any news that exchanges stopped trading bitcoins.
I think they want to secure every transactions and make the bitcoin become safer for all the traders that's why they are regulating this because they want that every investors and traders are safe from any scammers. I hope that this wouod be the reason behind banning bitcoin in different countries.