Office building下沉 courtyard effect

Quick answer：

The 'Office building sinking courtyard effect' refers to the architectural design where a courtyard is incorporated into the basement level of an office building, creating a below-ground space that serves as a garden or recreational area. This design can enhance the aesthetic appeal and functionality of the building, offering a tranquil space for employees or visitors to relax. It can also maximize the use of the land by incorporating a courtyard into the basement level, which might be challenging in urban environments where space is limited.