What is Mr. Yin Yang?

——? Mr. yin and yang, that is, yin and yang are born. In the Yuan Dynasty, Yin and Yang studies were set up to teach astrology, house observation, divination and tomb observation in order to learn the name of Yin and Yang. Since the Ming Dynasty, Yin and Yang have become proper terms for missing stars. Also known as Yin and Yang, commonly known as Mr. Feng Shui.