bitcoin is supposed to be used to trade for goods and services. this is still kosher in China.
you can buy a lot of w/ever online for just one $10000 USD/ bitcoin.
I've heard Chinese voices state that things are changing with the Party and the people. Things are also changing in the west. Govt.s are being cautious, but they also are starting to see the world trade and innovation value of BTC. Not to mention, they have already figured out that you can't actually "ban" it.
They talk about leadership in development being important to growth of the nation blah blah blah. Bitcoin does well for the economy.
Now, if there weren't so many outright scams and disastrous fiascoes going on all over the bitcoin world... They might not feel any need to intervene. Isn't; "the nail that sticks out gets hammered" an old Chinese adage?
I don't think governments are intervening because of scams. More about "control of the currency" and tax revenues.