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
The moon faints but the wind blows, the foundation moistens but the rain - yuè yūn ér fēng,chǔ rùn ér yǔ
A tired bird knows how to return - juàn niǎo zhī huán
take pity on the poor and the old - lián pín jìng lǎo