legal ground
Article 40 of the Criminal Procedure Law: Defence lawyers may consult, extract and copy the case file from the date when the people's procuratorate examines and prosecutes the case. 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 41 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.