What does Dan Qing mean by drawing blueprints?

Dan Qing's blueprint refers to a beautiful vision. Dan refers to cinnabar and green refers to green pheasant (sound "Huo"), which are two kinds of minerals that can be used as pigments. Because in ancient China, scarlet and cyan were commonly used in painting. Dan Qing became a synonym for painting art. Blueprint: figurative planning, planning. Dan Qing's initial intention of drawing blueprint, pen and ink. It is a state of realm.