Prison in a broad sense refers to a place where all prisoners are held, including prisons, jails, detention centers, etc. A prison in a narrow sense refers to a place where criminals who are sentenced to death with a two-year suspension of execution, life imprisonment, or life imprisonment in accordance with the provisions of the Criminal Law and the Criminal Procedure Law are executed in prison. We should implement the principles of combining punishment with reform, education and labor to transform criminals into law-abiding citizens. The competent department of prisons is the Prison Service, and the highest administrative agency is the Ministry of Justice.