A long history
It is a well-established Chinese idiom. The Pinyin is Yu á nqu á NW à NH ú, which means that literary thinking overflows. From Wen Shuo.
The origin of Idioms
Su Shi's Wenshuo of Song Dynasty: "my writing is like the spring of ten thousand Dendrobium, which comes out of nowhere."
Idiom usage
As an object or attribute, it refers to a person's literary talent.
A long history
parade with beautiful dress in broad daylight - yì xiù zhòu xíng
promise with no intention of doing - yǒu kǒu wú xīn
old in age but vigorous in mind - fà duǎn xīn cháng