For individual families, it is different. There are numbers on the floor, and there are five lines in the numbers. Everyone's life has ups and downs, and the five elements that are beneficial to him need to be remedied, so the number of floors where he lives is different. For example, a layman who needs to make up the fire is very good to live on the fourth floor, because the third and fourth floors belong to the fire. Those who say they don't want the fourth, eighth and 18th floors, say that 4 stands for "death", 8 stands for "seven ups and downs" and18 stands for "hell", in fact, they don't know anything and are superstitious.
Here you are taught to remember the five elements of Jin Mu fire, water and soil of the floor: 1 and 2 genus wood; 3, 4 belong to fire; 5, 6 belong to soil; 7 and 8 are gold; 9. 10 belongs to water, and above 1 1 only counts mantissa, and the mantissa calculation conclusion is the same as above. Remember this, when you meet a guest, you will have something to say. You can say that you don't know fortune-telling, but if the guest knows what is the best of his five hit lines, you can suggest which floor he should buy. For example, if a guest hits the best five-line wood, then the floors 1 and 2 are appropriate, 1 1 and 18.
Haha, I majored in engineering and Feng Shui, so I know a little. Ok, I believe you can do it!