Where does "Kanyu" come from?

Huai Nan Zi, an ancient book of Han Dynasty in China, said: "Honesty, gentleness and easiness, and the public will sound like Anemarrhena asphodeloides." Xu Shen in the Eastern Han Dynasty said: "Kan, Heaven also; Hey, the tunnel is also. " Integrity refers to observing the sky, integrity refers to measuring the earth, and integrity is the study of the operation of heaven and earth.

China's Kanyu theory is the inheritance and differentiation of divination before the Han Dynasty. Based on the book Hutuluo, it combines the eight diagrams of nine planets and the five elements of Yin and Yang to form a special theoretical system, thus inferring or changing people's good fortune.

Kanyu, an activity of looking up at astronomical geography, was linked with astronomical geography from the beginning. In a sense, holistic research is the science of ancient environment and architecture in China.