Inventions and creations in prison can be reduced by several years.

1. A criminal who has been sentenced to criminal detention, fixed-term imprisonment of not more than three years, or declared probation, may have his sentence reduced or his probation period shortened if he has made significant meritorious service during the probation period; However, the actual sentence executed after commutation cannot be less than half of the original sentence, and the correspondingly shortened probation period of probation cannot be less than the actual sentence executed after commutation.

2, was sentenced to fixed-term imprisonment of criminals, fixed-term imprisonment of less than five years, should 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; If a person is sentenced to fixed-term imprisonment of not less than ten years, he shall be sentenced to fixed-term imprisonment of not less than two years before his sentence can be commuted. The starting time of commutation of fixed-term imprisonment is calculated from the date of execution of the judgment.

3. For a criminal sentenced to life imprisonment, if the criminal sentenced to life imprisonment meets the conditions for commutation during the execution of the penalty, the sentence may be commuted after the execution period has expired for more than two years. Those who have made significant meritorious service (inventions and creations belong to major meritorious service) may be reduced to fixed-term imprisonment of not less than 20 years but not more than 21 years.

4. A criminal sentenced to death with a two-year suspension of execution shall be commuted to life imprisonment. If he meets the conditions for commutation, his sentence may be commuted after the expiration of execution for more than three years. Those who have made significant meritorious service may be reduced to fixed-term imprisonment of not less than 23 years but not more than 24 years.