The research object of Sanyuan Naqi is geography, and the research object of Xuankong is time.
The research object of Sanyuan Naqi is geography, including home feng shui, which is based on form. The theoretical derivation emphasizes formula, which is relatively fixed and will not change frequently.
The research object of Xuankong Feng Shui is time. Luck will change every year, so Feng Shui needs to be recalculated in conjunction with frequent updates of space. I solemnly declare that the answers are for reference only, please do not be blindly superstitious.