What is the meaning of wet and dry separation

The wet and dry separation of the bathroom mainly refers to the separation of the shower area from the sink, and the separation of the shower area from the toilet and sink. Dry, refers to the dry area such as the sink, wet, refers to the shower area and other areas that are prone to water vapor. The old bathroom is mostly wet and dry a room, that is, the shower area, washbasin and toilet set up in a room, in the shower area is easy to use when the air is dirty as well as humid indoor environment, more likely to accumulate bacteria as well as microorganisms.