From the South China Morning Post, via Asia Media:
The mainland’s definition of a “state secret” is so wide and vague that it could be applied to almost anything. Any information that has not been published in the state-controlled press is considered secret.
Ching’s trial was closed to prevent the release of any “state secrets”. The trial even generated state secrets of its own: the text of the guilty verdict was not released — evidently because it, too, is a state secret. (But that text has appeared, mysteriously, on the internet).