Early Chinese compasses were also known as
Compass.
Sinan may be the earliest compass. Early compasses were also called compasses because the magnetic pointing tool was often placed on a plate marked with directions.
The compass, also called the compass, is a tool used for Feng Shui detection and is a commonly used operating tool in the Liqi sect. The compass is mainly composed of a magnetic needle located in the center of the disk and a series of concentric circles. Each circle represents the ancient Chinese's understanding of a certain level of information in the large system of the universe.
The ancient Chinese believed that a person's aura is controlled by the aura of the universe. If a person is in harmony with the universe, it is auspicious, and if a person is not in harmony with the universe, it is a bad thing. Therefore, based on their experience, they put all the information at all levels in the universe, such as the stars in the sky, everything on the earth represented by the five elements, the heavenly stems and the earthly branches, etc., on the compass.
The original form of magnet refers to polarity and magnetic director:
As for the understanding and application of magnet's ability to attract iron, it is said that the magnet door of the Qin Palace can prevent people with iron blades. The assassin enters. There are many descriptions of the phenomenon of magnets attracting iron in literature, such as "Lu Shi Chun Qiu" written during the Warring States Period, "Huainan Zi" written during the Western Han Dynasty, and "Lunheng" written by Wang Chong of the Eastern Han Dynasty. These authors all mentioned the phenomenon of magnets attracting iron.
Objects such as tortoiseshell and amber can attract certain light and small objects. Wang Chong pointed out that these phenomena are the result of "induction" (a view of action at a distance), but he does not seem to know the difference between electric induction and magnetic induction. The compass is made of natural magnet. To invent the compass, it is necessary to study the polarity of the magnet.
Reference for the above content: Baidu Encyclopedia-Compass