About "black jails" in China...

"'Black jails' refers to ad hoc detention centers where troublesome out-of-town petitioners are illegally detained until they are forcibly taken back to their home provinces. Petitioners taken to these detention centers have reported being subjected to everything from extortion to torture and are held without formal legal proceedings.

Beyond the black jails, there have also been reports of local government officials beating up petitioners and even locking them up in mental hospitals to prevent their complaints from reaching authorities in Beijing."


Soure:

http://blogs.wsj.com/chinarealtime/2011/12/16/black-jails-time-to-start-blaming-beijing/