What can the procuratorial organ do to reduce the sentence or probation of prisoners?

According to Article 5 of the Provisions of the Supreme People's Court on Several Issues Concerning the Specific Application of Laws in Handling Cases of Commutation and Parole, commutation is generally not applicable to criminals who are sentenced to criminal detention or to fixed-term imprisonment of less than three years. However, if a person has made significant meritorious service during the probation period of probation, his sentence may be reduced in accordance with the provisions of Article 78 of the Criminal Law, and the probation period of probation shall be shortened accordingly. The actual execution term after commutation shall not be less than 1/2 of the original sentence, and the corresponding reduced environmental test period shall not be less than the actual execution period after commutation. The probation period of probation for criminal detention shall not be less than two months, and the probation period of probation for fixed-term imprisonment shall not be less than one year, so probation can apply for commutation.