How many years can good feng shui last?

Geomantic omen with time concept belongs to the category of dividing water by flying stars in the sky, and its main theory comes from three yuan and nine luck. One yuan, 60 years, three yuan, 180 years, of which 20 years is a ***9 luck. Consistent with the acquired gossip, the duration of good feng shui varies from 20 years to 180 years. The specific judgment method should be based on the mountain, direction, construction time, surrounding chaos and other conditions. hope this helps