Simple is beautiful.
The poem I learnt in my school days that still stays in my mind:
"Beauty is truth and truth beauty."
Well, a lot of people try hard to make simple things complicated to show how knowledgeable they are. One example is about the teaching of Three Cycles and Nine Periods (San Yuan Jiu Yun 三元九運).
Great Feng Shui masters in the past knew a lot about astronomy and geography. They definitely knew that Jupiter and Saturn do not meet in exactly 20 year cycles and could not have related San Yuan Jiu Yun to Jupiter and Saturn movements. Even the alleged relation between Sui Xing 歲星 and Jupiter 木星 is only a beautiful misunderstanding.
Masters in the past knew that there were 60 year cycles according to the Jia Zi combinations. They also knew that there were 9 stars that take turn to rule in Heaven. The ruling star is called a Ling Xing 令星. The term of office is 20 years. Why?
It is simple mathematics that the LCM of 60 and 9 is 180. When 180 is divided by 60, the result is 3 and hence 3 cycles of 60 Jia Zi. When 180 is divided by 9, the result is 20 and hence 9 periods of 20 years each. It is a simple piece of mathematics. Remember that Mathematics is the Queen of Sciences. It is interesting to note that some people who claim that Feng Shui is scientific simply ignore the simple and beautiful mathematics and go for the more complicated astronomy for answers.
We are in Period 1 today? No way.