Legal basis: "Provisions of the Supreme People's Court on Several Issues Concerning the Specific Application of Laws in Handling Cases of Commutation and Parole" Article 6 The starting time for commutation of a sentence of a criminal sentenced to fixed-term imprisonment is: if the fixed-term imprisonment is less than five years, it shall be executed for more than one year before commutation; A person sentenced to fixed-term imprisonment of not less than five years but not more than ten years shall have his sentence reduced by one year and six months; Those sentenced to fixed-term imprisonment of more than 10 years shall have their sentences reduced after two years. The starting time of commutation of fixed-term imprisonment is calculated from the date of execution of the judgment. Those who do repent or perform meritorious service shall be sentenced to fixed-term imprisonment of not more than nine months at a time; Those who do show repentance and perform meritorious service shall be given a one-time mitigated sentence of fixed-term imprisonment of not more than one year; Those who have made significant meritorious service shall be sentenced to fixed-term imprisonment of not more than one year and six months; Those who do show repentance and make significant meritorious service shall be commuted to fixed-term imprisonment of not more than two years at one time. For criminals sentenced to fixed-term imprisonment of not more than ten years, the interval between two commutation shall not be less than one year; For criminals sentenced to fixed-term imprisonment of more than 10 years, the interval between two commutation shall not be less than one year and six months. The time interval of commutation shall not be less than the sentence after the last commutation. Criminals who have made significant meritorious service may not be restricted by the above-mentioned starting time and interval of commutation.