Who invented the eight-character calculation?

The "eight characters" are also called four pillars (year pillar, moon pillar, sun pillar and time pillar), each of which has two characters, above which are heavenly stems (A, B, C, D, E, Ji, Ke, Xin, Man and Ghost) and below which are earthly branches (Zi, Ugly, Yin, Mao, Chen, Si and Wu).

According to legend, during the period of the Yellow Emperor, China's calendar (now the lunar calendar) was made by the emperor's family and Fu. Since the era of the Yellow Emperor, there have been 78 flowers and 68 flowers. A 60-year-old flower is composed of heavenly stems and earthly branches arranged in turn and combined circularly.

The eight characters express the position of the sun when a person is born. According to the principle of yin-yang and five elements, we can calculate a person's personality and the life trend presented by this personality. There are many schools of eight-character analysis. Generally speaking, it is divided into traditional school and non-traditional school. Traditional schools are divided into Jiangmen and Zhang Ci. Non-traditional schools include Chen Hanxin School and Infinite Mind School.