Bazi is early, and it should be the earliest prediction number. It has been very popular in the Tang Dynasty, and can be traced back to the Huangdi Neijing. Therefore, in ancient times, to understand medicine, one must understand the horoscope. Many diseases can be seen based on the horoscope, and in ancient times the so-called Readers must also know their horoscopes. By calculating their horoscopes, they can better understand their parents' situation. Therefore, the Bazi culture has become a deep-rooted way of life for the Chinese people, and can be seen everywhere in life, such as naming a child at birth, choosing a date, getting married, and even naming a company, etc., all with Bazi, affecting all aspects of popular life.
Ziwei Dou Shu is a numerology developed on the basis of eight characters. It can be traced back to the Song Dynasty. It is said to have been invented by Chen Tuan, a Taoist in the Northern Song Dynasty, so it appeared very late