To pick up and keep items lost by others; often used in the idiom 路不拾遗 lù​bù​shí​yí describing a safe and honest society.

To collect or compile missing information; to supplement or correct omissions in a book or text.

A low-ranking imperial official in the Tang Dynasty responsible for advising and criticizing the emperor to prevent errors in judgment.

(literary) As easy as picking up a lost item; used as a metaphor for something extremely simple to achieve.

To gather leftover grain after a harvest