What are the provisions of the Criminal Procedure Law on agents?

Legal analysis: 1, lawyers; 2, people's organizations or criminal suspects and defendants recommended by the unit; 3. Guardians, relatives and friends of criminal suspects and defendants. legal basis: article 49 of the criminal procedure law of People's Republic of China (PRC). Defenders and agents ad litem believe that public security organs and people's procuratorates; People's courts and their staff members who hinder them from exercising their litigation rights according to law have the right to appeal or accuse to the people's procuratorate at the same level or at the next higher level.