xiǎo​xīn​jǐn​shèn

prudent

小心谨慎 (小心謹慎) xiǎo​xīn​jǐn​shèn
prudent idiom
acting with great care and circumspection to avoid mistakes or risks

One should be cautious before signing any legal documents.

Frequency

Movie subtitles
1.88 per million appears in 1% of films
Written text
1.42 per million

Sources

Definitions
CC-CEDICT