A shopping mall rain garden design scheme refers to a plan for incorporating a rain garden into the design of a shopping mall. Rain gardens are designed to capture, filter, and retain stormwater runoff, reducing the strain on the local drainage system and promoting water conservation. This scheme would typically include details on the placement, size, and types of plants, the design of the garden bed, and any necessary infrastructure, such as permeable pavement and soil amendments, to ensure effective stormwater management.