Fortune telling is also called Xuan _ fortune telling.

Metaphysics is not superstitious knowledge, but a specific philosophical trend of thought in ancient times. It was liberated from the complicated Confucian classics of the Han Dynasty in an attempt to reconcile "nature" and "Ming religion".

Metaphysics developed in Wei and Jin Dynasties in China and showed a hot trend in the middle of Song Dynasty. There were many people who studied metaphysics in ancient times, including the seven sages of bamboo forest who we are familiar with. According to the division of Justin, a historian in the Eastern Jin Dynasty, it can be divided into three stages. Each stage is represented by celebrities and revolves around the dialectical problem of "existence". Metaphysics has developed very rapidly and set off an upsurge.

Laozi said: "The mysterious is the mysterious, the gate of Wan Qi". This is the original use of the word "Xuan". Metaphysics is a trend of thought that appeared in China from Wei, Jin and the mid-Song Dynasty, advocating Laozi and Zhuangzi and focusing on studying and explaining Laozi, Zhuangzi and Zhouyi. In daily life, most people will choose to believe in some idols or science, thus rejecting metaphysics. In fact, metaphysics is a philosophy, not a superstition. Not made up by later generations, but it does exist, and it is not unreliable.