The procuratorate is a state organ generally established in all countries in the world, exercising the state procuratorial power. People's procuratorates exercise procuratorial power over major criminal cases that endanger national security, public safety, and infringe upon citizens' personal rights and democratic rights. Examining cases investigated by public security organs and deciding whether to arrest, prosecute or not to prosecute. Prosecuting and supporting public prosecution in criminal cases. Supervise the legality of the activities of public security organs, people's courts, prisons and detention centers.