The Shanghai-based activist says the police owe him 17 computers.
Wang Peng was told to get out after he tried to highlight what he says are unfair population controls.
Critics say the guards won't stop people taking revenge on an 'unjust society.'
A leaked judgment jailing Huang Wenxun for four years fuels fears for two of his fellow activists.
Rights campaigners say the authorities resort to "gangster tactics" when they can't find a criminal charge to pin on them.
One group drinks the poison in a police station while another takes pesticide outside a newspaper headquarters.
Also in Guangdong, one of three lawyers charged with subversion reports deteriorating health.
Rights campaigners are keeping vigil outside two police detention centers in Zhengzhou.
Pro-democracy groups say the consultation process left them out, while the government has ignored public opinion.
The criminal investigation may signal more formal proceedings to come.
Popular financial news anchor Rui Chenggang is detained, leaving an empty chair and a silent microphone.
Li Biyun denies public order charges and formally complains about ill-treatment in custody.
Lawyers traveling out of town to help with cases appear to be particularly vulnerable.
Journalists and rights groups say the rules can be used to muzzle government critics.
Lu Gengsong's home is searched, although no reason is given for the charges.
Tibetan blogger Woeser is placed under house arrest after an invitation from the U.S. Embassy.
China's president warns against further confrontation between the two countries.