The residences of aristocrats and bureaucrats in the Song Dynasty were magnificent. The Song Dynasty developed in economy, handicrafts, and science and technology, which enabled the Song Dynasty's architects, carpenters, craftsmen, engineers, Dougong system, building structure, and modeling technology to reach a very high level. Building methods are also becoming increasingly systematic and modular, and buildings are gradually showing free and changeable combinations, blooming mature styles and having a more professional appearance. In order to enhance the indoor space and lighting, the column reduction and column shifting methods were adopted. The number of layers of large and thick brackets on the beams and columns increased, and irregular beam and column layouts appeared, which jumped out of the Tang Dynasty beam and column layout. Neat mode.