Bazi belongs to the five arts of ancient metaphysics. The five arts in the ancient metaphysical system refer to fortune telling by mountain doctors. Mountain refers to cultivating immortals; medicine refers to traditional Chinese medicine; fortune refers to numerology and prediction, such as Ziwei Dou Shu and Zi Ping Bazi; phase refers to physiognomy, such as Feng Shui and fortune telling; divination refers to divination, such as Liuyao and Qimen Dunjia. The Five Arts were born out of classical Chinese metaphysics and are a fusion of philosophy, culture, and mathematics.