Lawyers shall properly keep and use the case files and materials that have been consulted, extracted and copied according to law. Except for legal documents that can be made public according to law, they shall not be provided to people who have nothing to do with the case for reference, extraction or reproduction, and shall not disclose the case file materials or contents or disclose them to unrelated people. Lawyers shall not disclose personal information such as the address, work unit and telephone number of witnesses and victims to others, including criminal suspects and defendants.