Classics are powerful, and the change of classics begins with the Book of Changes. The Book of Changes means that the Book of Changes is a complete ideological system and a flexible response to things. The right to experience is a pair of important categories in China's ancient philosophy, which refers to the hard-won principle followed by nature and human beings, that is, permanence. Adhering to the classics and changing is the great wisdom to treat people with things, in which the classics are a complete ideological system, and changing is yuantong, which means using one's own complete ideological system to handle things yuantong.