Legal basis: People's Republic of China (PRC) Lawyers Law.
Article 31 When acting as a defender, a lawyer shall, according to facts and laws, put forward materials and opinions on acquittal, lighter punishment or reduction or exemption of criminal responsibility of criminal suspects and defendants, so as to protect the litigation rights and other legitimate rights and interests of criminal suspects and defendants.
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.