Wang Xizhi: evenly stippling, matching distance and distance, spreading cloth and researching essence, and harmonizing pen and ink; Fronts and fibers come and go, and the density is attached.
Liu Gongquan: "With a pen in your heart, your mind is regular and your pen is correct."
Wei Shuo: "You must do your best to send it when you write a little ink and draw a wave of flexion."