energy must flow
The main task of feng shui is to create harmony with nature, it is important to allow the ch'i to flow.
The ch'i is the vital flow that as in the person determines the illness or health so in the realization of a house must be left free to flow.
The veins of the dragon, that is, the energy channels that are found on the human body and on the earth must be respected.
The feng shui expert must be both an astronomer, a surveyor, a numerologist and a researcher of proportions in order to indicate how these principles must be respected.
The tool for evaluation is the bagua, which literally means number eight, it defines the areas and functions based on the cardinal points. There is a version to design the houses of the living and one to design the cemeteries.
Bagua, the eight areas
The eight areas of the scheme define the functions of the rooms and are related to the basic elements of feng shui (water, wood, fire, earth, iron) and the symbol in yin yang that represents the duality of things.