What are the modeling features of Caijing Case in Cave 257 of the Northern Wei Dynasty?

The pattern of the caisson in Cave 257 in the Northern Wei Dynasty consists of a multi-layer square frame beam pattern, in which the center of the caisson is painted with four flying feet, the four corners of the frame are fixed with clothes, and the rest are four-sided or bilateral symmetrical double-sided continuous patterns with grass patterns, flames and water patterns. The liveliness of characters and the regularity of patterns reflect each other, forming a harmonious and unified overall effect. The colors are mainly ochre and yellow, with occasional blue and green, which are steady and steady.