Legal basis: Article 37 of the Criminal Procedure Law of People's Republic of China (PRC), a defense lawyer can meet and correspond with the criminal suspect in custody and learn about the case from the criminal suspect; Providing legal aid and acting as an agent for complaints and accusations against criminal suspects.
Provisions on the Procedures of Public Security Organs in Handling Criminal Cases Article 40 Public security organs shall ensure that defense lawyers engage in the following professional activities according to law during the investigation stage:
(a) to the public security organs to understand the criminal suspect accused of the crime and the case, and put forward opinions;
(two) to meet and correspond with the criminal suspect, and to understand the case from the criminal suspect;
(3) Providing legal aid and acting as an agent for complaints and accusations against criminal suspects;
(4) applying for changing the compulsory measures against criminal suspects.