The design of sunken courtyards in Tianjin is a traditional architectural style that combines the natural landscape with the man-made environment. These courtyards are characterized by a central open space surrounded by walls and are often found in the city's historical districts. The design aims to create a serene and harmonious atmosphere within a bustling urban area. Features include rockeries, ponds, pavilions, and traditional Chinese gardens elements. This style reflects the cultural heritage of Tianjin and the fusion of Chinese and Western architectural influences.