"Feng Shui" was originally a technique for observing geography on the spot, and it was also called "Feng Shui" or "Feng Shui Theory" in ancient times. It is said that the founder of geomantic omen is Jiutian Xuan Nv, and the relatively perfect method of geomantic omen originated in the Warring States Period.
The core idea of Feng Shui is the harmony between man and nature.