Design drawing of sunken courtyard under office building

Quick answer：

The design drawing of a sunken courtyard under an office building typically includes architectural plans, elevations, and cross-sections that illustrate the layout and structure of the courtyard. This type of design often aims to maximize natural light and ventilation, create a serene space for office workers, and integrate greenery into the urban environment. Key elements in the design might include landscaping, hardscaping, and the integration of the courtyard with the office building's infrastructure.