This is in conjunction with my earlier acticle.
 
In the Sam Yuan Xuan Kong feng shui science, the calculation and setting up of flyingstar diagram for a building depends on known info about the building construction was completed and ready fof use in which year, falls into which yun.
 
The building life yun star would then enable the setting up of yun pan (heaven pan) as per the Lo Shu number flying track. Once done, this would enable which nos to be taken into the centre for water and mountain stars as per the building facing/sitting direction info. Next, whether the subequent nos of the mountain and water stars in centre should fly out clockwise or anti-clockwise, it depends on the 8th yun yin yang setting for 24 mountains, instead of using the fixed 24 mountains yin yang as per the luopan, which is named "earth pan" as per 5th yun setting.
 
Below diagrams are self-explanatory, could help for illustration the above Xuan Kong feng shui rules. Eg, 24 mountain's yin yang are not fixed, but change as per the yuan yun's going.......