What does metaphysics include?

Metaphysics is the study and explanation of Laozi, Zhuangzi and Zhouyi. Produced in the Wei and Jin Dynasties. It is the main philosophical trend of thought in Wei and Jin Dynasties, and it is a philosophical and cultural trend of thought produced by the integration of Taoism and Confucianism.

The original meaning of the word "Xuan" is a deep red color that is almost black, so Xu Shen's Shuowen is interpreted as: Xuan, you are far away. The word "Xuan" comes from Laozi's Tao Te Ching. "Xuan is both mysterious and mysterious, and it is deep and subtle. The origin of the name "Metaphysics" is precisely because the speakers in the Wei and Jin Dynasties called three books Zhouyi, Laozi and Zhuangzi, so the name "Metaphysics" came from this.