The meaning is the same as "pen and ink", which originally refers to literary words. Three Kingdoms Cao Wei Pi's Essays on Canon: "The author is ancient, in calligraphy, and feels the article." Later generations also refer to calligraphy and Chinese painting.
Explanation:
1, pen and ink.
Source: Zhang Heng's "Returning to Tianfu": "Swinging ink to stimulate algae, Chen Xing traces the model." Yuan Zhen's "Bai Baiyun": "When the title is exhausted, it is timely."
2, refers to the text or article.
Source: Cao Pi's Dian Lun Paper: "The author of ancient times sent his own calligraphy and wanted to see the book."
3, refers to calligraphy or painting.
Source: Biography of Mi Fei in Song Dynasty: "Calligraphy is wonderful, written by Wang Xianzhi."