There is no such thing as authorized agency in procedural law, only general authorized agency and special authorized agency. Article 89 of the Interpretation of the Higher People's Court on the Application of the Civil Procedure Law of People's Republic of China (PRC): "... If the power of attorney only says' power of attorney' without specific authorization, the agent ad litem has no right to admit, waive, change the claim, settle, file a counterclaim or appeal on his behalf."

Ask a lawyer to represent the lawsuit, and the plaintiff needs to sign the complaint.