Fifteen deletions refer to the calligraphy style in which the number of strokes per word is limited to 15. Emphasize concise, neat and concise strokes, and pursue short and pithy calligraphy works. The fifteenth Han Dynasty indicates that the number of strokes per word is not limited, which can exceed the calligraphy style of 15 painting. Pay attention to the richness and variability of pen and ink, and pursue the grandeur, fullness and magnificence of calligraphy works.