Tian Cheng sunken courtyard illustration

Quick answer：

The 'Tian Cheng sunken courtyard illustration' likely refers to a diagram showcasing the design and layout of a sunken courtyard in traditional Chinese architecture, known as 'Tian Cheng' style. This style features a courtyard that is lower in elevation than the surrounding buildings, creating a sense of privacy and tranquility. The illustration would typically include details such as the arrangement of structures, pathways, and landscaping elements within the courtyard.