Laogai

Laogai (勞改/劳改), the abbreviation for Láodòng Gǎizào (勞動改造/劳动改造), which means "reform through labor," is a slogan of the Chinese criminal justice system and has been used to refer to the use of penal labour and prison farms in the People's Republic of China (PRC), which takes up more than half of the world's slaves. Laogai is distinguished from laojiao, or re-education through labor, which is an administrative detention for a person who is not a criminal but has committed minor offenses, and is intended to reform offenders into law-abiding citizens. Persons detained under laojiao are detained in facilities that are separate from the general prison system of laogai. Both systems, however, involve penal labor.