they are only suggested ideas

but some realtors or furnishing companies may go to extremes

and prop up their realty or furnitures prices

these are what people strongly against.

feng shui is like that

there maybe 10 years of east wind. there may be 10 years of west wind.

the yellow river changed directions all the time, we may be east of the river for 10 years, and then west of the river for 10 years.

10 years means a long time or many years in Chinese.

everything changes. even feng (wind) and shui (river/water).

so they said.