Xu Gong's pen and ink skills are profound, the lines have a sense of strength, and the colors are rich and vulgar. Xu Cao's "Three Heroes of Wind and Dust" Xu Cao's "Three Heroes of Wind and Dust" Xu Cao's "Three Heroes of Wind and Dust" Xu Cao's "Three Heroes of Wind and Dust" Xu Cao's "Three Heroes of Wind and Dust" Xu Cao's "Three Heroes of Wind and Dust"