It is how china punish they prisoner during 1980.
The cell only 1 meter width, 1.6 meter height and 2 meter long.
The cell no light no windows, total darkness.
The cell have 2 heavy iron door.
Middle of both iron door got a hole use to pass the food to prisoner
No Bed, prisoner only sleep in the cement floor.
Prisoner no able to stand up only kneel or sit.
Shackle will be lock prisoner feet.
There is a hole on the floor door piss and shit.