2. The height of the floor is mainly to avoid the height of dust floating objects in the building. Generally, cities with an altitude of 1500m in the north are between floors 1 1~ 15.
It would be nice if your floor exceeded the height of floating objects.
3. Singular numbers are masculine and even numbers are feminine. Your second floor and 1 are both odd and even numbers, which are a combination of yin and yang and balance. If yin is abundant, it may be unfavorable to the male master, and yin is abundant and yang is weak; If the whole sun is not good for the hostess, then it is more rigid and less elastic.
4. Congratulations on choosing a good floor, God willing. It seems that you are a person related to Buddha. May happiness always accompany you.