The door stepping stone is a must for the entrance door, but the bathroom door stepping stone may or may not be required. When decorating the door stone, its level must be slightly higher than the bathroom floor by 5 to 10 mm, which can slightly block the flow of water. Feng Shui is used to prevent the leakage of wealth in the home. The standard stone thickness is usually around 18~20mm, and the height of any entry stone in the home should not exceed this thickness, that is, no more than 20mm. The first is to be beautiful and coordinated, the second is to reduce stumbling when walking, and the third is to improve Feng Shui. Sheng means increasing luck. If you are particular about Feng Shui, you can prepare 7 or 8 modern coins and bury them under the door stone during decoration, which means to attract wealth (Seven Yang) and fortune (Eight).