The effect of a下沉式 courtyard in a minsu (inn)

Quick answer：

Downstairs courtyards in minsu, or inns, are designed to create a sense of depth and privacy. They often incorporate traditional Chinese architectural elements such as curved walls, rock formations, and water features. These courtyards serve as tranquil retreats, offering a peaceful space for guests to relax. The layout and materials used in these courtyards can significantly impact the overall aesthetic and ambiance of the inn.