Architectural introduction: The architectural structure of "Caiyi Hall" is a five-beam house with nine beams and nine rafters in the front (front pavilion) and back corridor, with a depth of 14.03 meters, a width of three bays of 14.98 meters, and a hard mountain top with five ridges. There are 116 colorful paintings on the beams, purlins, pillars and columns in the hall, which are divided into three categories: pure baggage paintings, full outline baggage paintings and palace-like paintings. The patterns are mainly composed of geometric brocade patterns, floating clouds, swimming dragons and cranes, and the contents include "Lions rolling hydrangea", "Mandarin ducks in lotus pond", "Songs and cranes prolong life", "Brows with joy", "Crane and deer spring together", " "Kilin Pine Branch" and so on; some pictures are painted with bitumen powder to create a strong three-dimensional effect; the colors are cyan, blue, black, white, yellow, ocher, red, etc., the colors are elegant and the tone is soft, especially the snail green background color ; The geometric figures filled with real gold are still dazzling after more than five hundred years. These more than 100 paintings, with rich themes and exquisite rendering, integrate painting, sculpture and sculpture. They can be regarded as the finest works of Jiangnan Baojin color painting and an excellent representative work of "Su-style color painting".