Lawyer Zhang Si Zhi What are the famous defense speech?

In the trial of the Gang of Four, he served as Li Zuopeng's defense counsel, and later, also served as the defense counsel for many major cases, such as the 1988 Daxinganling fire Zhuang Xueyi "dereliction of duty" case; 1994 Gao Yu "leaking state secrets" case; 2003 Zheng Enchong lawyer "leaking secrets" case. Gao Yu "leaking state secrets" case in 1994; Zheng Enchong lawyer "leaking secrets" case in 2003. The defense of which are very famous!