In real life, are there any occupations such as Yin and Yang teachers?
In the Warring States period, there was a school that advocated the theory of Yin-Yang and Five Elements, which was called "Yin-Yang School". At that time, Zou Yan and Zou Shuang from the State of Qi were the main representatives. With the complexity and variety of the world, the simple way of thinking when everything is dichotomous can no longer explain what is happening in front of us. Thus, a new mode of thinking was derived, such as "Eight Diagrams", which were used to express the movement and change of Yin and Yang, and represented various natural phenomena, and could be used to calculate the passage of time, natural changes and various opportunities in life. The wise ancients then arranged the interpretation of these phenomena into "Yi", and the reference book handed down to this day in the Zhou Dynasty was the "Book of Changes". The "Five Elements Theory" developed from Jin Mu's theory that the five basic substances of fire, water and soil are "constantly circulating and changing". Studying the theory of yin-yang, five elements, we can draw up a calendar from the calculation of the operation of celestial bodies and master everything in the world. Later, astronomers who specialize in celestial bodies, calendar experts and five-element experts were developed. ?