Xu Ziping, the founder of astrology with five elements and eight characters.

Xu Ziping, a famous resident of the Northern Song Dynasty, had an unknown life story. According to legend, he lived in seclusion with Chen Tuan in Huashan Mountain at the end of the Five Dynasties, and wrote two volumes of Xu Luozi's Notes. He improved the naming of this algorithm on the basis of Liesanlian method (year, month and day calculation algorithm), making the eight-character method also known as the bisection method.

According to legend, there was a Xu Ziping in the Song Dynasty who was good at astrology. Later, all the magicians taught him, so he was called Ziping. "As a folk custom, Zhang Si of the Qing Dynasty devoted himself to Ziping's fortune-telling in Tufeng Record. Yuan Hai Zi Ping, which is popular in Hong Kong and Taiwan, is a masterpiece of fortune-telling in the name of Zi Ping. " "Siku" also said: "Ziping's deeds can't be tested, and his independent study is the teaching of the world. Today, he is called "Ziping numerology" because of his name. Today, Wang, Zhang Jiyuan, all admire Zi Pingshu.

Xuming was founded in Xu Ziping in the Northern Song Dynasty. Before that, there were only six characters, not eight. He invented the four-column method (calculation algorithm of year, month, day and hour) on the basis of the three-column method of Li in Tang Dynasty. Taking the branches of the four pillars as the eight characters and speculating the fate of life with the restraint relationship in the eight characters has a particularly wide impact on society, so that the eight-character method is also called the Ziping method. It can be said that Xu Ziping is the founder of the real eight-character numerology.