Legal basis: People's Republic of China (PRC) Lawyers Law.
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.