The Chinese awareness of the earth’s magnetic field dates back to the Shang dynasty (1650-1027 BC). However, it was not until 500 BC during the Zhou dynasty that this information was used as an orientation aid. At that time, orientation instruments were created in such shapes as needles, spoons, and disks; these were used to establish magnetic and geographic constants. These eventually lead to the analysis of eight directions, five elements, and four seasons, Chinese astrology charts which were later engraved on the base of the Chinese compass which had over 24 rings or layers. These are used by the Feng Shui Masters to analyse the space.
