I can only recommend you a Korean geomantic scholar, hong-key yoon, who is a well-known Korean university professor in academic circles. He has a good study of Feng Shui in China, and thinks that the origin of Feng Shui is related to the geographical environment of the Loess Plateau in the Central Plains. This thought has influenced many people, including Professor Yu Xixian, a famous geomantic geographer in China. Professor Yu Xixian read and introduced many works of Yin Hongji.