You can call the police, slander or insult others, and if it does not constitute a crime, you shall be punished by fines, detention and other public security management penalties according to law;
If the case constitutes a crime, the parties concerned shall bring a lawsuit directly to the court.
Whoever slanders or insults others and causes serious social impact shall bear criminal responsibility. This kind of case belongs to criminal private prosecution, and the victim himself or his legal representative or close relatives directly bring a lawsuit to the people's court.
legal ground
Article 246 of the Criminal Law
Whoever publicly insults others by violence or other means or fabricates facts to slander others, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention, public surveillance or deprivation of political rights. The crimes mentioned in the preceding paragraph shall be dealt with only if they are told, except those that seriously endanger social order and national interests. If the victim informs the people's court of the acts specified in the first paragraph through the information network, but it is really difficult to provide evidence, the people's court may request the public security organ to provide assistance.