From all kinds of data, the two theories existed at the same time, but before the Song Dynasty, it was obvious that the integration of water and soil was the mainstream, and after the Song Dynasty, especially in the Ming Dynasty, the integration of water, fire and soil became the mainstream. This is because after the Song Dynasty, Ziping theory began to occupy the mainstream of Lu's life, while the ancient law gradually disappeared, so it can be said that with the prevalence of Ziping's eight-character theory, the theory of fire, water and soil became the mainstream. The biggest difference between Ziping's method and the ancient method is that it shifted from focusing on the annual column to the solar column. Because of this change, the technique of numerology has also changed: the ancient method is based on the annual column, and the three lives are based on the nectar. The hierarchical transformation is mainly based on Rizhu, which has three elements: Ganlu, life support and underground support. Why is there such a change in technology? Let's go back to the difference between the two five elements, that is, the true five acts as the innate invisible qi and the ten acts as the tangible five elements. Congenital yang, acquired yin. The innate five elements are divided into yin and yang, and the acquired five elements are divided into yin and yang. It is difficult to directly observe the invisible qi.
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