Iron painting and silver hook are used to describe calligraphy as strong and soft. From "On the Use of Brushstrokes": "Wandering and pitching, graceful and romantic, strong as iron painting, charming as silver hook." Painting: strokes; hook: hook.
Idiom usage: conjunction; used as predicate, attributive, and object.
Examples:
1. After studying the silver-hook and iron-painted stones, I wanted to see the ancient calligraphy books of the Tang Dynasty. ——Qing Dynasty Shen Zengzhi's poem "Inscribed on the Four Wonders of Guangyun in the Northern Song Dynasty".
2. Wen Yiduo's "The First Chapter of Spring": "It is painted with some cursive calligraphy of monk Huaisu's iron paintings and silver hooks."
3. Xuanyuan Bufan read it quietly. , these two iron paintings with silver hooks, the handwriting on the back of the paper can be seen clearly. The words are filled with a father's care and love for his children, as well as the diligent expectations, which he never had or expected.