Legal basis: Criminal Procedure Law of People's Republic of China (PRC).
Article 34 A criminal suspect has the right to entrust a defender from the day when he is interrogated for the first time by the investigation organ or compulsory measures are taken. During the investigation, he can only entrust a lawyer as a defender. The defendant has the right to entrust a defender at any time.
Article 38 In the process of investigation, defense lawyers may provide legal aid to criminal suspects or criminals: please change compulsory measures when representing complaints and accusations. The investigation organ shall know the charges charged by the criminal suspect and the relevant circumstances of the case, and put forward opinions.