A correct understanding of the harm that the entrance door brings to people's life and residence is a necessary condition to find a solution. Once the room type is determined, it can't be changed, and the harm that the entrance door brings to people's lives can only be changed by other means. First of all, keep the sanitation on both sides of the entrance door, and make the environment unobstructed, clean and tidy, and pollution-free, which will reduce the pollution caused by the elevator; Hanging Chinese knot pendants on both sides of the entrance door, and determining the size of Chinese knot according to the size of the entrance door; You can also hang a decorative curtain on the porch door to prevent the dirty air brought by the elevator; Or put a red carpet in front of the house, which can also be solved.