Chinese often used the celestial pole
determined by the pole stars to determine
the north-south axis of settlements. This
technique explains why Shang palaces at
Xiaotun lie ten degrees east of due north.
In some cases, as Paul Wheatley observed,
they bisected the angle between the
directions of the rising and setting sun to
find north. This technique provided the more
precise alignments of the Shang walls at
Yanshi and Zhengzhou.
The earliest evidence of feng shui
provided in early Yangshao and Hongshan
cultures. Professor David Pankenier and his
associates reviewed astronomical data for
the time of the
Banpo dwellings (4000 BCE) to show that
the asterism Yingshi (Lay out the
Hall, in the
Warring States period and early
Han era) corresponded to the sun's
location at this time. Centuries before, the
asterism Yingshi was known as
Ding. It was used to indicate the
appropriate time to build a capital city,
according to the Shijing. Apparently
an astronomical alignment ensured that Banpo
village homes were sited for
solar gain.
The grave at Puyang (radiocarbon dated
5,000 BP) that contains mosaics of the
Dragon and Tiger
constellations and
Beidou (Dipper)
is similarly oriented along a north-south
axis. The presence of both round and square
shapes in the Puyang tomb, and at
Hongshan culture ceremonial centers,
suggests that the [[gaitian]]
cosmography (heaven-round, earth-square) was
present in Chinese society long before it
appeared in the Zhou Bu Suan Jing.
Cosmography that bears a striking
resemblance to modern feng shui compasses
(and computations) was found on a jade
unearthed at Hanshan (c. 3000 BCE). The
design is linked by
Li Xueqin to the liuren
astrolabe, zhinan zhen, and
Luopan.
All capital cities of China followed
rules of Feng Shui for their design and
layout. These rules were codified during the
Zhou era in the "Kaogong ji" (Manual of
Crafts). Rules for builders were codified in
the "Lu ban jing" (Carpenter's Manual).
Graves and tombs also followed rules of Feng
Shui. From the earliest records, it seems
that the rules for these structures were
developed from rules for dwellings.

Before
Confucianism was established as the only
philosophy allowed in China around 200 B.C.
, Taoism and many other philosophies enjoyed
relatively free expression of their
individual idea. Under the banner of
educating the perfect citizen, anything
other than Confucianism was banned. Many
philosophies were prosecuted. The surviving
Tao philosophers moved to the mountains and
Taoism further split to a secular scholar
philosophy and a religious practice.
In Han
dynasty (206 B.C.-220) secular Taoism
philosophers became very technical and
emphasis on technical skills and
mathematical calculation. The technical
methods of studying houses and tombs grounds
has allowed the Taoism to revive after the
huge persecution in the early Han Dynasty.
It has become the most fashionable study for
well to do Chinese scholars who had too much
time, money and wisdom. They also pushed the
application of Taoism and I-Ching to the
every day practice to furniture
arrangements.