The pen is fluent
As a Chinese idiom, Pinyin is B à h à NR ú Li ú, which means that the writing style is fast. From the biography of Tao Kan in the book of Jin.
The origin of Idioms
In the biography of Tao Kan in the book of Jin, it is said that "there are few books far and near, but you can't help answering them with your hands. Your writing is as good as flowing, and it's not stagnant."
Idiom usage
As a predicate or attributive; referring to a person's writing style
The pen is fluent
The past does not mend the present - bù fǎ gǔ bù xiū jīn
the melon is sweet , but the stalk is bitter - gān guā kǔ dì
both intelligent and courageous - zhì yǒng shuāng quán