Is the geomantic compass based on the earth's magnetic field or geographical magnetic field?

Compass is a tool for feng shui detection, and it is also a common operating tool for managing style. The compass is mainly composed of a magnetic needle in the center of a disk and a series of concentric circles, each of which represents the ancient people in China's understanding of a certain level of information in the cosmic system.

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The ancients believed that man's gas field was controlled by the gas field of the universe, that harmony between man and the universe was auspicious, and disharmony between man and the universe was fierce. Therefore, they put all levels of information in the universe, such as the stars in the sky and the five stars on the ground, by experience.

Everything represented by behavior, heavenly stems and earthly branches, etc. Put them all on the compass. Geomantic omen is to find the most suitable position or time for a specific person or thing through the rotation of a magnetic needle. Although the concept of "magnetic field" is not mentioned in Feng Shui, the coordination of the directions, orientations and intervals of all layers on the compass implies the law of "magnetic field".