A man of letters but not of deeds
It's an idiom with the pronunciation y ǒ UW é NW ú x í ng, which means that although you have literary talent, you have bad character.
explain
Though he has literary talent, he has bad character.
source
Ji Yun of the Qing Dynasty wrote in the notes of Yuewei thatched cottage: "those who are either literate or have nothing to do for a long time, and who are obscene and disdainful, can beg for food."
Examples
Qian Daxin's new record of shijiazhaiyangwang Chong in the Qing Dynasty said, "it is a crime of fame and religion to cover oneself as a sage while Zi destroys his relatives."
A man of letters but not of deeds
said of an elegant demeanor and high personality - yù gǔ bīng jī
weigh up one thing against another - quán héng qīng zhòng
bring the painted dragon to life by putting in the pupils of its eyes - huà lóng diǎn jīng