He was sentenced to 2 years and 2 months in prison, detained in a detention center for 6 months, and served a sentence of 1 year and 8 months after deduction. According to the regulations, the maximum sentence can be halved, that is, the minimum sentence is 10 month. Those who meet the conditions for commutation may apply for commutation. Whether the sentence can be reduced depends on the criminal's daily performance, whether he has no regrets, and whether he has rendered meritorious service. The law stipulates that the maximum sentence can be halved, which is basically not achieved. Legal basis: The applicable conditions and limits of Article 78 of the Criminal Law. Criminals sentenced to public surveillance, criminal detention, fixed-term imprisonment or life imprisonment may have their sentences reduced if they consciously abide by prison regulations, receive education and reform, and truly repent or perform meritorious service during the execution period. Those who have made one of the following major meritorious deeds shall be given a reduced sentence: (1) preventing others from engaging in major criminal activities; (2) reporting major criminal activities inside and outside the prison, which is verified by investigation; (three) there are inventions or major technological innovations; (4) sacrificing oneself to save others in daily production and life; (five) outstanding performance in resisting natural disasters or eliminating major accidents; (6) Having made other significant contributions to the country and society. The actual term of imprisonment after commutation shall not be less than the following period: (1) If the sentence is sentenced to public surveillance, criminal detention or fixed-term imprisonment, it shall not be less than half of the original sentence; (two) sentenced to life imprisonment, not less than thirteen years; (3) If a criminal whose execution is suspended is restricted by the people's court in accordance with the provisions of the second paragraph of Article 50 of this Law, his sentence shall be commuted to life imprisonment after the expiration of the suspended execution, and less than 25 years have passed since the expiration of the execution.