The idea of this film is very clever.
Caution: pay close attention to external things or your own words and deeds to avoid unfavorable or unfortunate things.
We are cautiously optimistic about the prospects of the negotiations.
Smart and cautious: smart and smart, pay close attention to external things or your own words and deeds, and avoid unfavorable or unfortunate things.
Example: Under the white terror of the enemy, our underground party member is working skillfully and cautiously.