There are 3 charts available under Flying Star Principle

[Robert Lee]

Explanation of Flying Star Charts (Xuan Kong Fei Xing)
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There are three charts available (especially in the Report Management)
a. 20-Year Flying Star Chart
b. Yearly Flying Star Chart
c. Monthly Flying Star Chart
What are the difference and which one should I use?
a. 20-Year Flying Star Chart
This is the basic chart which you should be using to find your best house or
office. Why, this is because for the entire 20-year period, the stars on the
chart will show you the stars that is influencing your house if it is built
or had a last major renovation. This influences of this chart will not
change even if you proceed to the next period, as it takes the FS based on
the date of your house (or birth date of your house).
b. Yearly Flying Star Chart
This is the chart which you can use to make general yearly fine-tuning which
will help you avoid any unfortunate stars during this year, you can also
take the opportunity to enhance the good fortune if any.
c. Monthly Flying Star Chart
This provide further breakdown of your charts for month to month changes in
the stars. You can use this for saying month to month events for your office
or house. Eg. is it a good period to do something in this house or office?
Also, you can take extra caution if a month has a bad star.
Hope that helps you understand why this theory has 3 types of charts. Flying
Star is one chart which takes into account the Feng Shui of your house and
office. The main and most important is the 20-year for determining a
suitable house, the yearly and monthly helps you to be able to further
isolate any problems.
Hope you find this information useful:)
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http://www.geomancy.net - Centre for Feng Shui Research