Laogai
Laogai (Chinese: 劳改), short for laodong gaizao (劳动改造), which means reform through labor, was a criminal justice system involving the use of penal labor and prison farms in the People's Republic of China (PRC). Láogǎi (劳改) is different from láojiào (劳教), or re-education through labor, which was the abolished administrative detention system for people who were not criminals but had committed minor offenses, and was intended to "reform offenders into law-abiding citizens".