Eight Mansion Feng Shui (sometimes called East Groups/West Groups) is a method that has many uses. At a macro level, it enables you to rapidly select the best properties from a selection of properties that you might be considering to rent or purchase. It gives clear rules for beneficially opening new doorways, or closing old ones (often a key change). Inside the house if gives directions for the best sleeping, sitting or studying positions, and best personal facing directions. It complements, but does not conflict with, Flying Star feng shui. It is a very versatile but somewhat underrated method, that in the past has not been fully taught.