Subterranean Courtyard Style

Quick answer：

The subterranean courtyard style, also known as sunken garden, is a traditional Chinese architectural feature. It involves creating a courtyard at a lower level than the surrounding ground, often with a roof over it. This design aims to maximize privacy, minimize heat gain in summer, and enhance the sense of tranquility. It's characterized by its unique layout, incorporating elements such as stepping stones, water features, and greenery.