Legal analysis: According to relevant laws and regulations, an agent ad litem may be entrusted in administrative litigation. The Public Security Bureau is a party to administrative litigation and may entrust an agent ad litem. However, the person in charge of the public security bureau or the relevant staff should appear in court to respond. At the same time, an actor with no capacity for litigation can also be represented by a legal agent.

Legal basis: Administrative Procedure Law of the People's Republic of China

Article 31 A party or legal representative may entrust one or two persons as agents ad litem. The following persons may be entrusted as agents ad litem: (1) lawyers and grassroots legal service workers; (2) Close relatives or staff members of the parties concerned; (three) citizens recommended by the community, units and relevant social groups where the parties are located.

Article 30 A citizen without legal capacity shall be represented by his legal representative. If the legal representative shirks the agency responsibility, the people's court shall appoint one of them to represent the lawsuit.