Commercial下沉广场平面

Quick answer：

A 'Commercial sinking square plan' refers to a floor plan or design layout of a下沉广场 (sinking square), which is a type of public space integrated into the design of commercial buildings. These squares are often situated below ground level and can include retail spaces, restaurants, and other commercial activities, designed to create a harmonious blend of urban and commercial functions. The plan would detail the spatial arrangement of different areas within the square, such as pathways, seating areas, and the distribution of commercial units.