The government, via an anonymous spokesperson, has just released a statement on their website according to Reuters.

They say that China "bans using the Internet to subvert state power and wreck national unity, to incite ethnic hatred and division, to promote cults and to distribute content that is pornographic, salacious, violent or terrorist."

And add that "China has an ample legal basis for punishing such harmful content, and there is no room for doubting this. This is completely different from so-called restriction of Internet freedom."

Well that's that solved then.