If the perpetrator of a fight does not constitute a crime, the public security organ will impose an administrative detention punishment on him, and the perpetrator is generally held in a detention center; If the perpetrator constitutes a crime and is detained for a criminal offence, the perpetrator is usually detained in a detention center.
 Legal basis
 Article 43 of the Law of the People's Republic of China on Administrative Penalties for Public Security, if he beats another person or intentionally injures another person's body, he shall be detained for not less than five days but not more than 10 days and shall also be fined not less than 200 yuan but not more than 500 yuan; If the circumstances are relatively minor, he shall be detained for not more than five days or fined not more than 500 yuan. Under any of the following circumstances, a person shall be detained for not less than 10 days but not more than 15 days, and shall also be fined not less than 500 yuan but not more than 1000 yuan: (1) gang up to beat or hurt another person; （2） Beating or harming a disabled person, a pregnant woman, a person under the age of 14 or a person over the age of 60; （3） Beating or harming others for many times, or beating or harming more than one person at a time.