Feng Shui is also part of the Mysterious culture (Shenmiwenhua) of China. Its purpose is to bring the two worlds (heaven and earth) together; the visible, physical world (Chinese called 'Yu') and the invisible, unseen vibrational world (Chinese called 'Kan'). Feng Shui is the edge in between these two worlds. An earlier name for feng shui was 'KanYu' meaning between Heaven and Earth. Over thousands of years, many aspects of divination have evolved from the Taoist philosophy of yin/yang, the 8 trigrams of the I Ching and the astrological systems of the 'Heavenly Stems' and 'Earthly Branches' and 'Lunar Mansions'.
The study of Feng Shui included a broad range of subjects and is considered part of the 8 'rays' of Traditional Chinese Medicine - acupuncture, herbal medicine, Wushu (Chinese martial arts) & Qigong (breathing exercises), food energetics, moxibustion, meditation, astrology and feng shui. According to tradition, "the 'River Chart' (Ho T'u) was a diagram supposed to have been borne out of the Yellow River on the back of a 'dragon horse' during the reign of the legendary Fu Hsi. This mathematical chart is one of the most ancient diagrams of Chinese numerical cosmological thought. "The 'Lo Writing' (Lo Shu) was supposed to have been borne out of the Lo River on the back of a tortoise at the time when the legendary Yu was draining off the waters of the great flood. This ancient diagram is often referred to as tute 'Ba Gua' or 'magic square', and is an arrangement of numbers reflecting the cosmological order of the seasons, directions and 8 trigrams in regards to the five element theory. In the Ching dynasty encyclopedia 'Si Xui Chu Shu" , Feng Shui is classified under the same category as mathematics because both are symbolic representations of nature. The divination of numbers is called 'Shu Shu' in China. The practice of using Feng Shui for grave sites is ancient. Five centuries before Christ, Chinese literature mentions the mausloea of Hoh Lu and his daughter having water flow towards the site. The I-Ching and divination using tortoise shells was used thousands of years ago to determine burial sites. Over the centuries the compass came to be used,and such is the method used today.