What is the importance of stair steps? Brief description of the importance of stairs and steps

1. In the stair design, the steps should be odd, not even, that is, the actual steps are 1 1, 13, 15, 17, 19, 2/kloc.

2. This is caused by the technological requirements of stair construction. Of course, in Feng Shui, it is also considered that the singular number is Yang. Also, because of people's foot habits, the first step will be as comfortable as the last step.