But the stated aim (eliminating capital flight from the Chinese economy) won't work without crippling the Chinese state into something as authoritarian as North Korea. The Chinese people, and in particular it's traveling, educated middle-class, are unlikely to be happy with the changes needed to eliminate capital flight effectively (further restrictions to travel and access to information would definitely be 2 important aspects of a successful elimination of capital flight). And even then, smart and/or educated Chinese people will skirt the ban, and Bitcoin will continue to be one of the successful methods.
Maybe the PRC could limit capital flight to only the most powerful and/or corrupt individuals, but that's a recipe for disaster also, really. Authoritarians in powerful states often die strangling themselves and those closest to them before they succeed in killing the whole country and it's people.
I am sure that soon there would be a digital uprising due to the controls imposed by their government right now...this can be too much especially for the newly emerging middle class section of the country. When you have the money and you lack the freedom to do something with it, there can be some resistance and the government have to careful to thread along this line. It may not be happening right now away and it can take many years but definitely changes would be brewing in China. There can be new and younger leaders who might not be too comfortable with the way the country is being governed right now and if there would be some economic problems they can be the catalysts needed for some reforms. China remains to be that bully boy in Asia no matter how good is their diplomatic handshakes are.