Fixed-term imprisonment is a kind of punishment and one of the five major punishments stipulated in China's criminal law (the other four are public surveillance, criminal detention, life imprisonment and death penalty). It refers to the punishment of depriving criminals of their personal freedom within a certain period of time and imprisonment in a certain place. Criminals sentenced to fixed-term imprisonment should be sent to prison for execution. Before being sent to execute the punishment, if the remaining sentence is less than three months, the detention center will execute it on its behalf. The term of fixed-term imprisonment is generally more than six months and less than fifteen years. Criminals sentenced to fixed-term imprisonment or life imprisonment shall be executed in prisons or other places of execution; Anyone who has the ability to work should take part in labor, receive education and reform. When a criminal is committed for execution, the people's court that committed him for execution shall, within 10 days after the judgment takes effect, serve the relevant legal documents to the public security organs, prisons or other enforcement organs. Fixed-term imprisonment is also a common punishment, and more than 400 crimes stipulated in the criminal law can basically be applied. Legal basis: The types of principal punishments in Article 33 of the Criminal Law of People's Republic of China (PRC) are as follows: (1) Control; (2) criminal detention; (3) Fixed-term imprisonment; (4) life imprisonment; (5) the death penalty.