Legal analysis: 1. If a criminal suspect requests to entrust a defender during his detention, he may ask the detention center to convey it, or he may ask the case-handling department to convey it when he is arraigned by the case-handling department. 2. If a criminal suspect is in custody, his close relatives or guardians shall entrust a defender. A prisoner may meet his relatives or guardians during his sentence. In principle, people who are not relatives are not allowed to meet, except for special circumstances approved by the prison. According to the practice of prison execution, in addition to the system of meeting criminals normally, under special circumstances, prisoners can be arranged to visit relatives or deal with family changes. The time for criminals to leave home is generally three to five days, and under special circumstances it is not more than seven days.

Legal basis: Article 165 of the Civil Code of People's Republic of China (PRC) * * * If the power of attorney is in written form, the power of attorney shall specify the agent's name, agency matters, authority and time limit, and shall be signed or sealed by the client.

Article 39 of the Criminal Procedure Law of People's Republic of China (PRC) * * * Defence lawyers may meet and correspond with criminal suspects and defendants in custody. Other defenders, with the permission of the people's courts and people's procuratorates, may also meet and correspond with criminal suspects and defendants in custody. If a defense lawyer holds a lawyer's practice certificate, a law firm's certificate, a power of attorney or a 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 criminal cases endangering national security and terrorist activities, defense lawyers should obtain permission from the investigation organ when meeting with the criminal suspect in custody during the investigation. The investigation organ shall notify the detention center of the above situation in advance. When a defense lawyer meets a criminal suspect or defendant in custody, he can understand the case and provide legal advice. From the date when the case is transferred for examination and prosecution, the relevant evidence may be verified with the criminal suspect or defendant. Defense lawyers are not monitored when meeting with criminal suspects and defendants. The provisions of the first, third and fourth paragraphs shall apply to the meetings and correspondence between defense lawyers and criminal suspects and defendants who are under surveillance.