calligraphy terminology. A technique of stippling with a pen. The "Eight-word Method" calls short skimming "pecking". Pen-pecking writing should be swift. Li Shimin, Emperor Taizong of Tang Dynasty, wrote in his "Calligraphy Tactics": "When you peck at your beard, you will fall ill with your pen." In the Yuan Dynasty, Chen Yi once wrote in "The Tips of Hanlin": "Peck, nod your head, leave your tail behind and lean back slightly, like pecking something with a bird's beak." In Qing Dynasty, Bao Shichen also said: pecking "is sharp and fast as a bird's pecking, which means that his painting is gradual and his cutting is like a bird's pecking".
so I think it's a pie.