Hello, I'm glad to answer your question. 1, regarding the problem of paying attention to the number of stairs, Feng Shui believes that the odd number is Yang and the even number is Yin. In addition, it is also related to the good or ill luck of the number of steps. Generally speaking, the words "life, honor, death and despair" are the most important. Use the words "life" or "honor" one step at a time, and avoid using the words "death" and "despair". 2. The number of days is 1, 3, 7, 9, and the digits are 2, 4, 6, 8. Therefore, if the number of stairs is days, it means "step by step". 2. The reason why the singular number is set is also related to people's walking habits. In most cases, people are used to walking left and right, at least three steps, and it is more comfortable to walk with the same feet as the steps.