Legal basis: According to Article 39 of the Criminal Procedure Law of People's Republic of China (PRC), defense lawyers can meet and correspond with criminal suspects and defendants in custody. Other defenders may, with the approval of the people's court or the people's procuratorate, meet with and correspond with criminal suspects and defendants in custody. If a defender holds a lawyer's practice certificate, a law firm's certificate and power of attorney, and an official letter of legal aid to ask for a meeting with the criminal suspect or defendant in custody, the detention center shall arrange the meeting in time, which shall not exceed 48 hours at the latest. In the case of crimes endangering national security and terrorist activities, if a defense lawyer meets a criminal suspect in custody during the investigation, he shall obtain permission from the investigation organ. Under the above circumstances, the investigation organ shall notify the detention center in advance. Defense lawyers can understand the case and provide legal advice when meeting with criminal suspects and defendants in custody; From the date when the case is transferred for examination and prosecution, the relevant evidence can be verified with the criminal suspect or defendant. Defense lawyers are not monitored when they meet with criminal suspects and defendants. The provisions of paragraphs 1, 3 and 4 shall apply to the meetings and correspondence between defense lawyers and criminal suspects and defendants living under surveillance.