What are the poems about "Silver Hook"?

On Ou Yangxun's pen in Tang Dynasty: "Wandering and pitching, tolerant and romantic, rigid and iron, charming as a silver hook", it was later called calligrapher's pen, and its stippling was both rigid and flexible. Yuan Gong Shitai's "Send a Word to Professor Zhang" says: "Six books are full of harmony and eight styles are elegant. Huang Zhong and Lu Tu are in harmony, painting with iron and silver hooks. " Qiu Jin's poem Linjiang Xian in Qing Dynasty: "There are two lines of iron painting and silver hooks, and the word is infinite Ding Ning." Also known as "iron painting silver hook". Wen Yiduo's "The First Chapter of Spring": "There are some cursive scripts painted on it, which were painted by Huai Su monks."