Chinese confidential documents.
A military history buff who bought a pile of old paper for $1 was surprised to find a collection of country's military history.When he came to know that it was a very sensitive matter he reported to the security. The purchaser, known by only his surname Zhang, is a fan of military history. He immediately recognised that the papers were highly confidential. Which is a State secret and which is not depends upon China's State Security bodies and the Communist Party legal system. Two people who were in magazine and second hand books business were being questioned . No one was arrested.