This long-standing rule of the forced labour was restated in a White Paper on Criminal Reform, published on 11th August 1992. Another measure, solitary confinement, means being shut into a cell as little as a metre square for long periods, sometimes days, without food, light, heat, sanitation, or water. Prisoners emerging after this treatment are often unable to walk unsupported. The 'strict regime' unit At Longxi prison, there is also a 'strict regime' unit, for prisoners for whom solitary confinement is not sufficient punishment. Here prisoners are forced to sit motionless for ten hours every day on a tiny stool just six inches high, which is in turn on a raised platform about 14 inches square.
Any movement is punished by blows administered by a guard with an iron rod.
All camp guards carry a large battery-powered truncheon capable of giving a 50,000 volt shock which is used on prisoners causing severe pain and temporary paralysis. During torture, these batons are applied to the most sensitive parts of the body, such as the nipples or genitals. Missing quotas are a common reason for torture. Another common form of torture is to restrain prisoners for long periods in positions which give rise to excruciating pain. For example, Harry Wu has said that while he was at the huge Tuanhe Farm prison camp, guards tied prisoners up by their thumbs and hung them from the rafters.