Metaphysics appeared in China from Wei-Jin to the mid-Song Dynasty, which was an ideological trend advocating Lao Zi and Zhuang Zi. Metaphysics is "Metaphysics". Based on "Ancestors Telling Lao Zi and Zhuang Zi", Laozi, Zhuangzi and Zhouyi are called "San Xuan", which is a new expression of Taoist knowledge, so it is also called Neo-Taoism.
Metaphysics is a manifestation of Taoism. It can be said that metaphysics is a branch or improvement of Taoism. In Wei and Jin Dynasties, the meaning of metaphysics refers to both words and deeds, and most of them are profound. "Xuanyuan" refers to the ontological problem of "transcending words and images" and staying away from concrete things. Therefore, emptiness, metaphysics and knowledge of metaphysics can be called metaphysics. Metaphysics scholars are mostly celebrities at that time. The main representatives are Yanhe, Wang Bi, Ruan Ji, Ji Kang, Xiang Xiu and Guo Xiang. It is based on the decline of Confucianism (Confucian classics) in Han Dynasty. It evolved from Taoism and Huang Lao's theory in Han Dynasty. It is the product of the direct evolution of Wei Chu dialect in the late Han Dynasty.