What should I do if I am maliciously sued?

The parties may immediately raise the case with the judge who is hearing the case, and provide relevant evidence materials. If one party attempts to infringe upon the legitimate rights and interests of others through litigation or achieve its own illegal purpose, which is verified by investigation and constitutes a crime according to law, it shall be investigated for criminal responsibility. According to Article 112 of the Civil Procedure Law, if the parties collude maliciously and attempt to infringe upon the legitimate rights and interests of others through litigation or mediation, the people's court shall reject their request and impose fines and detention according to the seriousness of the case; If a crime is constituted, criminal responsibility shall be investigated according to law.