Design drawing of a double-deck sunken courtyard

Quick answer：

A double-deck sunken courtyard design typically refers to a landscape architectural layout where a courtyard is situated below ground level, with one or more levels. This design often includes elevated platforms or terraces, steps, and multiple levels to create a sense of depth and exploration. It is commonly found in traditional Chinese architecture and modern residential or commercial buildings. The design aims to maximize privacy, enhance ventilation, and provide a tranquil space amidst urban environments.