A writer on a Federation of American Scientist Strategic Security Blog thinks he has found a picture of a new Chinese sub on Google Earth. He speculates that it can carry a more advanced sea-launched ballistic missile then previously known Chinese subs.
If it was anyone else, I would probably dismiss the story out of hand. But the Federation of American Scientist usually err on the side of caution. If they say they think they have found a new sub, they probably have.
(h/t Defense Tech: who also have some observations of their own.)