Article 30 of the Prison Law stipulates that the prison shall submit a proposal for commutation to the people's court, and the people's court shall examine and make a ruling within one month from the date of receiving the proposal for commutation; If the case is complicated or special, it can be extended for one month. The ruling on commutation shall be copied to the people's procuratorate. Article 31 If a prisoner sentenced to a two-year suspension of execution of the death penalty meets the conditions stipulated by law for commutation to life imprisonment or fixed-term imprisonment during the suspension of execution of the death penalty, the prison where he belongs shall promptly put forward a proposal for commutation after the expiration of two years, and after being examined by the prison administration organs of provinces, autonomous regions and municipalities directly under the Central Government, it shall be submitted to the Higher People's Court for ruling. Article 32 If a prisoner sentenced to life imprisonment or fixed-term imprisonment meets the conditions for parole prescribed by law, the prison shall submit a proposal for parole to the people's court according to the assessment results, and the people's court shall review and make a ruling within one month from the date of receiving the proposal for parole; If the case is complicated or special, it can be extended for one month. The ruling on parole shall be copied to the people's procuratorate. Article 33 If the people's court decides to grant parole, the prison shall grant parole on schedule and issue a parole certificate. Criminals released on parole shall be supervised by public security organs. If a criminal who is paroled violates laws, administrative regulations and the provisions of the public security department of the State Council on the supervision and administration of parole during his parole, which does not constitute a new crime, the public security organ may put forward a proposal to the people's court to revoke parole, and the people's court shall review and make a ruling within one month from the date of receiving the proposal. If the people's court decides to revoke parole, the public security organ shall put the criminal in prison. Article 34 Criminals who do not meet the conditions for commutation or parole prescribed by law shall not be commuted or paroled for any reason. If the people's procuratorate considers that the people's court's ruling on commutation or parole is improper, it shall lodge a protest within the time limit prescribed by the Criminal Procedure Law, and the people's court shall retry the case protested by the people's procuratorate.