Tiancheng下沉式庭院实景

Quick answer：

The 'Tiancheng sunken courtyard scene' refers to the actual view of a sunken courtyard designed by Tiancheng, a Chinese architectural firm. Sunken courtyards are a traditional Chinese architectural feature where a courtyard is located below the level of the surrounding ground, often used for relaxation and privacy. The design and layout of such courtyards can reflect the cultural and historical context of Chinese architecture.