Zhang kejian The Book of Changes is an ancient classic that expounds the changes of Vientiane in the world, and it is a profound dialectical philosophical work. Including Lianshan, Ghost Stories and Zhouyi, of which Lianshan and Ghost Stories have been lost, and only Zhouyi is left in the world. The Book of Changes, known as the source of ten thousand classics, is the general program of China traditional culture, which contains simple and profound natural laws and harmonious dialectical thoughts, and is the crystallization of the wisdom of the Chinese nation for 5,000 years. The Book of Changes is a product of ancient civilization and a philosophical work with a high degree of integration of natural science and social science in China. The Book of Changes is divided into three parts: Lianshan and Guizang in the era of Emperor Wu of the Han Dynasty, and Zhouyi in the Qin and Han Dynasties, also known as "three changes" (another said that all three books were written in ancient times).

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