To me, there is only one school of Feng Shui, that is the Xuan kong Feng Shui. Other schools of feng shui either are, copier of xuan kong OR Bullshit. It is very prominant that 8 manison, da qua , feishing.........whose content, concept, philosophy, knowhow and techniques, tools of application, all derived partly or wholly or falsely and wrongly , mistakenly, misconceptually that of xuan kong.

There is One Sun, One Moon, One Earth and That is One Xuan Kong Or One Feng Shui.There is One Natural Ying and Yang, One natural Tai Zee, One system of Natural wind and water.........on earth. There in Only ONE NATURE On Earth.Feng shui is the sturdy of Natural science and application of it power for benefits of man kind growth. There were No such scientific development some time ago and untill some time has lapsed the invention and discoveries of Power of naure such as the solar energy used in doimestic applicances and etc, the supply of hydro-electric of enengy and power and ................A time will come, There will be Feng Shui Bomb,- a mass destruction weapon to kill and to be prosperous by, -by man kind.

Fortunately such secrets and techuques to Trap The Power of The Nautre to commit such ill and descructive mission OR to further enhance prosperity of mankind HAVE YET TO BE EXPLORED, SECURED AND TAKEN IN POSSESSION. AND ESTABLISHED WIDELY, PUBLICLY.

To learn Xuan Kong feng shui, one has to know and undersatand what the pre-qua and post- qua is.It could be an hexagram, a cicular diagram or a 9 square chart where 8 direction each is of 45 degree. The pre-qua- ,.first , it represent direction, then it represent sex, and is a pair of yin and yang qi , or is a body opposing each other by character, all other defination and dimension. It flow freely in the air on earth and *Out of Earth*. It is to beleived that all beings both living and non living on earth are formed of these Yin and Yang qi by nature.These qi may be depleted, contaminated and de-powered that it is rquired to be replenlish, input, and maintained that the Xuan Kong Feng Shui surfaced. Xuan Kong Feng shui is a mechanism and functions by which these qi are *imported* to maintain the life strengthen and growth of any location on earth.

We may think It is just as that the natural mechanism of maintaining of oxygen content in the atmospheric air to support internal respiration by man kind.

I would say, it is the Di Yuan dargon, Tian Yuan dragon, and Ren Yuan dragon OR Ren Yuan Dragon, Tian Yuan Dragon and The Di Yuan Dragon.

The crossing seemed always resulted to have the Tian Yuan being in the central and Di yuan and Ren Yuan either to the left or to the right or vice versa, depending on how the ORDERS of crossing be made.

The liu Fa 49 27 for the upper era and the 1638 for the Lower era Of their Water Dragon activities. That is either the pre-Qua concept, Or the post qua concept, depending on how you look at it. The Thunderstrom earth quake, water fire and heaven earth QUa are the xuan kong Qua -a product of both the pre-qua and post -Qua. ( Or of their Crossing )

Do you see the *secret* why? Thunder ( Chen Qua ) is 3 and Xun qua is 4, Thunderstorm is Chen Xun Qua, Earth Quake is the 8 and 7, water is 1 and fire is 9.......................I did mention that for the 8th period , the Earthquake take control and IT INVOLVE THE HEAVEN AND EARTH QUA TOO, IN THIS CASE.