Double-layer small-scale three-dimensional flower bed plan

Quick answer：

A double-layer small-scale three-dimensional flower bed plan refers to the design and layout of a small-scale, three-dimensional flower bed that has two layers. This type of flower bed is often used in gardens, parks, or urban spaces to create a visually appealing and efficient use of space. The plan would include dimensions, materials, and the arrangement of plants for aesthetic and functional purposes.