Yan Jin Liu Gu, a Chinese idiom whose pinyin is yánjīnliǔgǔ, means that the calligraphy of the Yan and Liu families is strong but different in style; it is also generally referred to as excellent calligraphy. From "Stone Sacrifice Scholar's Text".
Yan refers to Yan Zhenqing, who is called "Yan Jin" because his calligraphy is full of muscles, and Liu refers to Liu Gongquan, whose calligraphy is strong and powerful, which is called "Liu Gu".
The source of the idiom is Fan Zhongyan's "Stone Sacrifice Scholar's Articles" of the Song Dynasty: "Manqing's pen is like the bones of the willow.
The idiom is used as an object and attributive; it refers to calligraphy.
The example is the heartbroken poem, which can be regarded as the history of Chinese characters. Yan Jin Liu Gu, Xian Zhi and Xizhi
★ Yuan Dynasty Guan Hanqing's "Putian Le·Xide Family Letter" Song Lu You's "Tang Xiya Xue Que". "Poetry: "I comment that this painting is like a strange book, the bones of the willows and bones are like those of Ou and Yu. "Volume 2 of "Surprise at the Second Moment": "There is no illegal stroke in this book.