There are jails for pretrial prisoners and for sentenced offenders. Sentences may include (1) supervision in the community by a committee or (2) incarceration. Inmates are eligible for parole after having served half their sentences, showing repentence, and performing meritoriously. The Beijing Municipal Prison houses up to 2,300 inmates and has a staff of 300. Inmates are classified on the basis of education, physical condition, and technical skills. This classification is the basis for housing and job assignments, and all inmates are expected to work. Discipline is maintained through a system of rewards and punishments. Inmates are allowed supervised visits. Political study is considered a primary rehabilitative tool, and staff have one-to-one talks and group discussions with inmates. The Beijing Labor Reformatory for juvenile delinquents has a highly regimented program of study and work. Work-study schools provide programs for juveniles who have committed offenses not punishable under criminal law.