I doubt that it will collapse, it may have significant effect on the ecosystem. But to say that it will fall just because of China banning bitcoin mining is absurd. And I'm sure big mining companies inside China has already a plan B in case the government made that bold move. At least if this happens, then it can break the monopoly and I'm sure there will be companies and countries will to take the lead.
If China will plan to ban Bitcoin again the history will only repeat itself.
I think what you are talking about is the news regarding their announcement about publishing their own cryptocurrency, it was published last August and for now, I think they are close to launching their own cryptocurrency.