How important is the water in the feng shui?

Shanhaijing summarized in buried book points out that the most important thing in feng shui angry one principle, is the "world water", namely the angry encounter water will stay down.Water is the key to produce gas, so water is the symbol of keep gas in feng shui, extended down is water can stay, there is water area will be rich.

Water is also an important reference to identify dragon vein.Big dragon by pinch of large rivers, small dry dragon by big creek jian pinch, big branches by stream small jian pinch, small branches by ditches paddy pinch.The other from the length of the water, also can tell the size of the stems.