What does Shi Yang mean in ancient Chinese?

In ancient Chinese, there is no word "Shi Yang", only one word "Yin and". The so-called Yin and He, also known as fortune tellers or magicians, originated in China. They not only know how to observe the stars and look at people's faces, but also know how to locate, recite spells and perform illusions. For people's intangible forces, such as fate, soul, illusion,