Good news would definitely save Bitcoin, "CHINA UNBAN BITCOIN". You would know what happen..
There is nothing to save, bitcoin will do fine with or withouth China.
On the other hand, if you are interested in increasing the price in short time, then bitcoin needs some sort of hype, which can be easily created through decent PR.
Dont know why its not being allready done..
Bitcoin will survive with or without China, however the Chinese government not allowing bitcoin to be used in China is hampering the amount of investment in bitcoin from China.