In the Zhuan Xu era around 4600 years ago, the ancestors had lived a settled agricultural life. After the beginning of spring, the Yang Qi floated on the ground, everything recovered, and people began to work in spring sowing and autumn harvest; in the cold winter, all things withered, people recuperated, and after another beginning of spring, people began the next spring sowing, autumn harvest and winter cultivation, and the nature is strict. The earth shows the cyclic law of the resuscitation of all things starting from the floating ground of Lichun Yang Qi. Therefore, Zhuan Xu based on the comprehensive factors of the universe, the environment and climate of China, the natural law of the growth of all things, and people’s production, practice and living habits. It is very scientific and practical to start the year with the beginning of spring.
The author believes that “HeTu” reflects the universal law of cosmic movement, while “LuoShu” reflects the special law of cosmic movement, that is, the law of a specific thing itself. (The author has a monograph in “He Luo” Overview). As far as the Universe is concerned, Yang Qi is born in the winter solstice, and Yin Qi is born in the summer solstice.http://www.360doc.cn/article/33210224_660158721.html
Since, the above article / discussion make sense in both aspect (Especially, the one that uses Winter Solstice). Then, shouldn’t we (also) ask ourselves…
Especially for 8 Mansion (八宅) Practitioners, have we been applying the wrong concept of plotting Life Gua (命卦) using Start of Spring (立春); or perhaps Winter Solstice (冬至) is a better representation of one Life Gua (命卦) number change. Since, Life Gua (命卦) is about playing with Gua (卦), shouldn’t this body of Feng Shui (風水) align closely with 12 Phrase Gua (十二消息卦) or iChing (已經).
Nonetheless, I recognize that there is many ways to play with 8 Mansion (八宅).