In geomantic omen, night is considered as a heavy time in Yin Qi, so the construction activities during this period may have some adverse effects on the surrounding gas fields. However, it does not mean that construction activities can never be carried out during the construction of the underworld, which needs to be considered comprehensively in combination with the actual situation.
The "underworld of architecture on the moon" in the Book of the Yellow Emperor may mean that it is more suitable or less suitable to carry out architectural activities in a certain period of time. However, it should be noted that the contents of Huang Di Shu may have a certain historical and cultural background, so it may not be applicable to modern society.
If you are interested in Feng Shui, you can consult professionals for more accurate information and suggestions.