One day's detention is worth several days' imprisonment.

One day of controlled detention is equivalent to two days of imprisonment.

1. The period of control shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to two days of imprisonment.

2. The term of criminal detention shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment.

3. The term of fixed-term imprisonment shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment.

According to the provisions of Article 41 of the Criminal Law, the period of control shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to two days of imprisonment. Article 44 of the Criminal Law stipulates that the term of criminal detention shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment. Article 47 of the Criminal Law stipulates that the term of fixed-term imprisonment shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment. Therefore, when a criminal suspect or defendant is sentenced to public surveillance, criminal detention or fixed-term imprisonment, the previous detention period can be reduced to imprisonment. Control, one day of detention is equivalent to two days of imprisonment, and one day of criminal detention and fixed-term imprisonment is equivalent to one day of imprisonment. Therefore, detention can be used to offset punishment, but it is limited to control, criminal detention and fixed-term imprisonment.

Legal basis:

Fixed-term imprisonment controlled by Article 41 of the Criminal Law of People's Republic of China (PRC) shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to two days of imprisonment.

Article 44 of the Criminal Law of People's Republic of China (PRC) stipulates that the term of criminal detention shall be counted from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment.

Article 47 of the Criminal Law of People's Republic of China (PRC), counting from the date of execution of the judgment; If a person is detained before the execution of the judgment, one day of detention shall be reduced to one day of imprisonment.