Design of half-submerged courtyard on the first floor

Quick answer：

Half-submerged courtyard design on the first floor is a type of architectural layout where a portion of the living space is partially sunken below ground level. This design often includes a combination of indoor and outdoor spaces, creating a seamless transition between the two. It allows for better utilization of the land, enhanced privacy, and increased connectivity with nature. The design may feature a variety of elements such as steps, railings, and landscaping to blend the indoor and outdoor spaces.