Design drawing of an open下沉式 courtyard

Quick answer：

An open下沉式 courtyard design typically features a courtyard that is lower in elevation than the surrounding ground level. This design often incorporates steps or a gentle slope to transition between the courtyard and the surrounding area. The design aims to create a sense of privacy and tranquility within the property, while also allowing for natural light and ventilation. Common elements in such designs include water features, gardens, and seating areas.