(1) Providing legal services and acting as an agent for complaints and accusations; (2) applying for bail pending trial or residential surveillance on behalf of the criminal suspect; (3) After meeting with the lawyer of the criminal suspect and accepting the entrustment, contacting the investigation organ, asking the investigation organ about the charges of the criminal suspect, and putting forward specific requirements for meeting the criminal suspect in time. Since the criminal suspect is interrogated for the first time by the investigation organ or compulsory measures are taken, the entrusted lawyer has the right to meet the criminal suspect and defendant with the lawyer's practice certificate, law firm certificate, power of attorney or legal aid letter to learn about the relevant case. (4) If the detention period expires and the arrest is not approved or the compulsory measures are changed, they may request the cancellation or change of the compulsory measures, and may obtain bail pending trial or monitor their residence. (5) If the arrest period expires and he is transferred to the procuratorial organ or changes the compulsory measures, he may request the cancellation of the compulsory measures or change the compulsory measures, and may obtain bail pending trial or be placed under residential surveillance.