Introduction to fortress-style architecture: The architectural style of Kangwanwan Manor is different from the courtyards and gang culture of Shanxi merchants, as well as the villas and theater layouts of Huizhou merchants. "The traditional cultural site selection is to build buildings facing the street, build cave dwellings against the mountains, set up docks along the river, and build stronghold walls. This not only retains the form of folk houses on the Loess Plateau and the courtyard houses in the north, but also absorbs the characteristics of government buildings, gardens, and military fortress buildings. With complete categories, reasonable layout, exquisite design and unique characteristics, it combines the simplicity and elegance of the south with the roughness and heaviness of the north. It is the most representative group of ancient buildings among the folk houses in the Central Plains and is known as a wonder of Central Plains art.