Yes, Feng Shui emphasizes that odd numbers are lucky and even numbers are unlucky. For example, if you use a Luban ruler to measure doors and windows, they will all be odd numbers (the odd numbers mentioned here are based on feet, feet, and inches), and the water flowing on the eaves will also be odd numbers. Definitely, including steps, you can use first-level steps, third-level steps, etc., five-level steps (at present, one-level steps and three-level steps are more common), second-level steps cannot be used, four-level steps (presumably you have never seen second-level steps, Four steps (maybe).