The architectural styles of northern gardens and Jiangnan gardens are quite different. Why?

The gardens in the north are large in scale and rich in colors, with red and yellow as the main tones, expressing the artistic conception of imperial power or power; Southern gardens are small in scale, small and exquisite in layout, plain in color, with black and white as the main tone, which expresses the psychological needs of garden owners to pursue tranquility; The style of garden architecture in the north is in harmony with the natural environment, such as the flat terrain in the north and the climatic characteristics of blue sky and white clouds. The landscape architecture style in the south is small in scale and exquisite in layout. The color of the building is plain, with black and white as the main tone, which not only caters to the psychological needs of the owners to pursue leisure and tranquility, but also blends with the scenery and humid climate characteristics of the mountainous areas in the south of the Yangtze River. ② The buildings in Shiqian mountain area are close to the water source and built on the mountain. The roofs of buildings are usually designed as slopes, which may be influenced by local weather, climate, topography and other environmental backgrounds. Due to the limitation of topography, mountainous areas can only be built on gentle slopes, which is beneficial to drainage. The roof of a building is often designed as a slope, which is beneficial to drainage and heat dissipation in rainy days. Stone walls are matched with wooden walls, which are warm in winter and cool in summer, and local building materials are used to achieve the purpose of harmony between man and nature.