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.
The ancients in China 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. So, by experience, they put all levels of information in the universe, such as the stars in the sky, everything represented by the five actions on the earth, heavenly stems and earthly branches and so on. , 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.
Origin and evolution
Marx said in the book "Machine, Natural Force and Application of Science": "Compass (compass) opened the world market and established a colony." This invention of ancient people in China was first used for navigation, which really promoted the emergence and development of capitalism. Magnetic needles are used for navigation, making three quarters of the earth's sea area a thoroughfare.
The predecessor of the compass is called "Sina", and the earliest record can be found in You Did Everything Wrong in the third century BC. At that time, when people talked about the phenomenon that magnets attract iron, they thought it meant "motherly belt", so they once wrote "magnetism" as "kindness".