Danqing: In the poems written by the ancients, painters are often called painters. In fact, Danqing originally refers to the two mineral raw materials of temple sand and green wok. Because it is not easy to fade, it is used as a metaphor for a person's achievements. Zhaoming. At the same time, these pigments are used in painting, so Danqing is also used to refer to the art of painting. The "painting hand" in the poem means painter.