What does the grass-roots or even the floor in home improvement mean?

Yes, it's no different from high-rise buildings, with odd floors and even floors. One thing is that whether it is single or double, the higher the price, the more expensive it is. Odd number 1 3 5. . . . Even numbers are multiples of 2, which is related to geomantic omen in some cases. Because China people still have some differences in their views and beliefs.