The law stipulates that: Article 36 of the Criminal Procedure Law of People's Republic of China (PRC) may provide legal assistance to criminal suspects during investigation; Acting as an agent for complaints and accusations; Apply for changing compulsory measures; Ask the investigation organ about the crimes and cases suspected by the criminal suspect, and put forward opinions.
Article 38 From the date of examination and prosecution by the People's Procuratorate, defense lawyers may consult, extract and copy the case files. Other defenders may also consult, extract and copy the above materials with the permission of the people's court or the people's procuratorate.
Article 39 Defenders who believe that the evidence materials collected by public security organs and people's procuratorates to prove the innocence or minor crimes of criminal suspects and defendants have not been submitted have the right to apply to the people's procuratorates and people's courts for retrieval.