Agent involved in litigation means that when litigation is involved, the parties entrust others as agents to carry out litigation activities on their behalf. An agent ad litem shall, within the scope of authorization, exercise litigation rights and perform litigation obligations on behalf of the client. In China's legal system, the parties can choose to entrust lawyers or other legal agents to participate in the litigation on their behalf. Agents involved in litigation are responsible for legal proceedings, filing lawsuits, submitting evidence, defending and other litigation activities on behalf of the parties. They play an important role in the litigation process, helping the parties to safeguard their own rights and interests, and defending and appealing in accordance with legal procedures.