What this article needs to discuss is an evidentiary rules, and is also a lawyer practicing right. Although《Law of the People's Republic of China on Lawyers》which was revised on October 28,2007 expanded the scope of lawyer keeping professional secrets, it has not touched the deep question of protection of lawyers' professional secrets, especially the privilege of evidence exemption has not established in our country that universally exists in developed countries. In the criminal justice domain, the rules of...