You probably do not have aclue what you are talking about. By that time when the video was made he was anunbeatable master of yang style tai chi chuan, and it is known that he had killed several of his enemies in fights by using taichi. So I think he knew better how to use tai chi in real combat situations than you.
原文:
...... By that time when the video was made he was an unbeatable master of yang style tai chi chuan, and it is known that he had killed several of his enemies in fights by using taichi....