Song dynasty folk paper cutting what patterns and patterns?

Folk also use the form of paper-cutting, with donkeys, cows, horses, sheep and other animal skins, carved into shadow play figures; blue printed fabric process of skeletonization plate is carved with oil cardboard into patterns, scraping the pulp printing pattern is the use of paper-cutting and engraving techniques, there is a yin and yang carving points, long lines to be separated, to point divided into real and imaginary.