If the perpetrator fights, two people are considered as gangs. According to the law, if the perpetrator engages in gang fighting, which does not constitute a crime, the public security organ will impose a public security punishment on him, specifically detaining him for not less than five days but not more than ten days, and may also impose a fine of not more than 500 yuan; If the circumstances are relatively serious, he shall be detained for not less than 10 days but not more than 15 days and may also be fined not more than 1000 yuan.
Legal basis
Article 26 of the Law of the People's Republic of China on Administrative Penalties for Public Security commits one of the following acts, shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan; If the circumstances are relatively serious, he shall be detained for not less than 10 days but not more than 15 days and may also be fined not more than 1000 yuan: (1) gang fighting; （2） Chasing or intercepting others; （3） Forcibly taking or demanding or arbitrarily damaging or occupying public or private property; （4） Other provocative behaviors.
