According to the Lawyers Law of People's Republic of China (PRC)
Article 34 A lawyer who acts as a defender has the right to consult, extract and copy the case file from the date when the people's procuratorate examines and prosecutes the case.
Article 35 An entrusted lawyer may, according to the needs of a case, apply to a people's procuratorate or a people's court to collect and obtain evidence, or apply to a people's court to notify witnesses to testify in court.
If a lawyer investigates and collects evidence by himself, he may, with the lawyer's practice certificate and the certificate of the law firm, investigate the situation related to undertaking legal affairs with the relevant units or individuals.
Extended data
Criminal Procedure Law of the People's Republic of China
Article 40 From the date when the people's procuratorate examines and prosecutes a case, the defense lawyer may consult, extract and copy the case file. 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.
Baidu Encyclopedia-People's Republic of China (PRC) Lawyer Law