Lawyers have the obligation to keep secrets, which is the minimum professional ethics, and keep the facts they hear confidential. However, criminal facts and information that endanger national security, public safety and other serious personal and property safety of others are not included. "According to the facts and laws, put forward the materials and opinions that the criminal suspects and defendants are innocent, the crime is light or their criminal responsibility is reduced or exempted, and safeguard the legitimate rights and interests of the criminal suspects and defendants. You shouldn't put forward defense opinions or comments against the suspect.
Legal basis: Article 38 of the Lawyers Law of People's Republic of China (PRC), lawyers should keep state secrets and business secrets they know in their practice activities, and may not disclose the privacy of their clients. Lawyers should keep confidential the information and materials that their clients and others are unwilling to disclose in their practice activities. However, criminal facts and information that endanger national security, public safety and other serious personal and property safety of others are not included.