What do you mean by $3900?
Ternary is an upper element, a middle element and a lower element. One yuan is 60 years, according to the number of years when Jupiter, Saturn and Mercury met, which also happens to be Jiazi. One yuan is shipped in three steps in 60 years, once every 20 years. Based on the number of years Jupiter and Saturn met. Shangyuan: It includes the first, second and third luck. Central Plains: Including the 4th, 5th and 6th National Games. Xia Yuan: Including the 7th, 8th and 9th National Games. The total is $39 for good luck, and * * * is 180 years. Just like the laws of stars in the solar system.
The origin of sanyuan jiuyun:
One of the sayings of "Sanyuan Jiuju" comes from the ancient chronology of dry branches, which was carried out with dry branches. According to legend, in 2697 BC, the Yellow Emperor deduced the astronomical calendar and designated this year as the first year of the Yellow Emperor. After that, every 60 years is a cycle, called "sixty flowers", one yuan. Sanyuan is three families, *** 180. Sanyuan is divided into Shangyuan, Zhongyuan and Xia Yuan. The 9th National Games came from nine planets, followed by the 1st White Water Transport, the 2nd Black Soil Transport, the 3rd Bimu Transport, the 4th Lvmu Transport, the 5th Loess Transport, the 6th Platinum Transport, the 7th Red Gold Transport, the 8th White Clay Transport and the 9th Purple Fire Transport.
"Spirit of the City" said: "The universe is closely related, and the mountains and rivers dominated by fate have true temperament, and momentum comes first. The movement of the earth has changed, the weather has changed, the movement of the sky has changed, and the earth's atmosphere has to respond. " Thus, the concepts of time such as Yuan, Yun, Year, Month and Day are the important theoretical basis of Kong Xuan's Feng Shui.